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Padhiyar J, Mahajan R, Panda M. RASopathies: Evolving Concepts in Pathogenetics, Clinical Features, and Management. Indian Dermatol Online J 2024; 15:392-404. [PMID: 38845651 PMCID: PMC11152490 DOI: 10.4103/idoj.idoj_594_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/27/2023] [Accepted: 10/01/2023] [Indexed: 06/09/2024] Open
Abstract
RASopathies refers to the group of disorders which are caused by a mutation in various genes of the RAS/MAPK (RAT sarcoma virus/Mitogen activated protein kinase) pathway. It includes many genes with varied functions, which are responsible for cell cycle regulation. As the mutation in one gene affects the entire pathway, there are many overlapping features among the various syndromes which are included under an umbrella term "RASopathies." However, neuroectodermal involvement is a unifying feature among these syndromes, which are caused by germline mutations affecting genes along this pathway. Recently, many other RASopathies have been described to involve blood vessels, lymphatics, and immune system. Also, many cutaneous mosaic disorders have been found to have mutations in the concerned pathway. The purpose of this article is to briefly review the pathogenesis of RASopathies with cutaneous manifestations, and summarise the features that can be helpful as diagnostic clues to dermatologists. As we understand more about the pathogenesis of the pathway at the cellular level, the research on genotype-phenotype correlation and therapeutic options broadens. Targeted therapy is in the clinical and preclinical trial phase, which may brighten the future of many patients.
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Affiliation(s)
- Jigna Padhiyar
- Department of DVL, Gujarat Cancer Society Medical College, Hospital and Research Centre, Ahmedabad, Gujarat, India
| | - Rahul Mahajan
- Department of Dermatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Maitreyee Panda
- Department of Dermatology, IMS and SUM Hospital, Bhubaneshwar, Odisha, India
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2
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Clabbers JMK, Roemen GMJM, Rajan N, Shah A, Woo P, Arefi M, Vreeburg M, Steijlen PM, Gostyński A, van Geel M. HRAS mosaicism in linear palmoplantar keratoderma. J Eur Acad Dermatol Venereol 2024; 38:e382-e384. [PMID: 37909292 DOI: 10.1111/jdv.19613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/24/2023] [Indexed: 11/03/2023]
Affiliation(s)
- J M K Clabbers
- Department of Dermatology, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Dermatology, Haga Hospital, The Hague, The Netherlands
| | - G M J M Roemen
- Department of Pathology, Maastricht University Medical Centre +, Maastricht, The Netherlands
| | - N Rajan
- Department of Dermatology, Newcastle University, Newcastle, UK
| | - A Shah
- Department of Dermatology, Northampton General Hospital, Northampton, UK
| | - P Woo
- Department of Dermatology, Northampton General Hospital, Northampton, UK
| | - M Arefi
- Department of Dermatology, Newcastle University, Newcastle, UK
| | - M Vreeburg
- Department of Clinical Genetics, Maastricht University Medical Centre +, Maastricht, The Netherlands
| | - P M Steijlen
- Department of Dermatology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - A Gostyński
- Department of Dermatology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - M van Geel
- Department of Dermatology, Maastricht University Medical Centre+, Maastricht, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Centre +, Maastricht, The Netherlands
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3
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Cantisani C, Paolino G, Di Guardo A, Gomes V, Carugno A, Greco ME, Musolff N, Azzella G, Rossi G, Soda G, Longo C, Pellacani G. Diagnostic Imaging of Agminated Blue Lesions and Blue Lesions with Satellitosis: Case Series with a Concise Review of the Current Literature. J Clin Med 2024; 13:894. [PMID: 38337588 PMCID: PMC10856709 DOI: 10.3390/jcm13030894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/22/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Background: Agmination and/or satellitosis in pigmented blue lesions is a phenomenon rarely mentioned in the literature and not well known. This phenomenon can be expressed by several benign and malignant pigmented blue lesions, such as blue nevi, Spitz nevi, melanocytoma and melanoma. On this spectrum, dermoscopy, reflectance confocal microscopy (RCM) and dynamic Optical coherence tomography (D-OCT) represent non-invasive imaging technologies, which may help clinicians in the diagnosis of melanoma and non-melanoma skin cancers in daily clinical practice. Methods: Currently, in the literature there is a lack of new data about agminated blue lesions and blues lesions with satellitosis, as well as the lack of a recent and updated review of the literature about this topic. Therefore, considering that clinicians must be confident with the diagnosis of these rare skin lesions, we decided to carry out this work. Results: In this paper, four new cases of agminated pigmented cutaneous lesions were described. Moreover, a review of the current literature on this topic was performed. Conclusions: A clinical-pathological correlation is often needed to reach a correct diagnosis; currently, dermoscopy and non-invasive diagnostic techniques, such as reflectance confocal microscopy and optical coherence tomography, due to the depth of these skin lesions in the dermis, can only make a partial and limited contribution.
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Affiliation(s)
- Carmen Cantisani
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
| | - Giovanni Paolino
- Unit of Dermatology, IRCCS Ospedale San Raffaele, 20132 Milan, Italy
| | - Antonio Di Guardo
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
| | - Vito Gomes
- Department of Anatomy and Pathology, Ospedale San Filippo Neri, 00135 Rome, Italy
| | - Andrea Carugno
- Dermatology Unit, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
- Ph.D. Program in Molecular and Translational Medicine (DIMET), University of Milan-Bicocca, 20126 Milan, Italy
| | | | - Noah Musolff
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
| | - Giulia Azzella
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
| | - Giovanni Rossi
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
| | - Giuseppe Soda
- Department of Molecular Medicine, Policlinico Umberto I, Sapienza University of Rome, 00185 Rome, Italy
| | - Caterina Longo
- Dermatology Department, University of Modena and Reggio Emilia, 41121 Modena, Italy
- Azienda Unità Sanitaria Locale–IRCCS di Reggio Emilia, Skin Cancer Center, 42122 Reggio Emilia, Italy
| | - Giovanni Pellacani
- Department of Dermatology, Sapienza University of Rome, 00185 Rome, Italy
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4
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Chatzopoulos K, Syrnioti A, Linos K. Spitz Melanocytic Tumors: A Fascinating 75-Year Journey. Genes (Basel) 2024; 15:195. [PMID: 38397186 PMCID: PMC10887813 DOI: 10.3390/genes15020195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/26/2024] [Accepted: 01/28/2024] [Indexed: 02/25/2024] Open
Abstract
Over the last 75 years, our understanding of Spitz lesions has undergone substantial evolution. Initially considered a specific type of melanoma, the perception has shifted towards recognizing Spitz lesions as a spectrum comprising Spitz nevi, Spitz melanocytomas, and Spitz melanomas. Spitz lesions are known for posing a significant diagnostic challenge regarding the distinction between benign neoplasms displaying atypical traits and melanomas. A comprehensive understanding of their molecular basis and genomic aberrations has significantly improved precision in classifying and diagnosing these challenging lesions. The primary aim of this review is to encapsulate the current understanding of the molecular pathogenesis and distinct clinicopathologic characteristics defining this intriguing set of tumors.
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Affiliation(s)
- Kyriakos Chatzopoulos
- Department of Pathology, Aristotle University, 54636 Thessaloniki, Greece; (K.C.); (A.S.)
| | - Antonia Syrnioti
- Department of Pathology, Aristotle University, 54636 Thessaloniki, Greece; (K.C.); (A.S.)
| | - Konstantinos Linos
- Department of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
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5
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Perkins IU, Tan SY, McCalmont TH, Chou PM, Mully TW, Gerami P, Pomerantz JH, Reyes-Múgica M, Balkin DM, Kruse LL, Huang B, Reichek JL, Gangopadhyay N, Chiosea S, Green JR, Chamlin SL, Frieden IJ, Bastian BC, Yeh I. Melanoma in infants, caused by a gene fusion involving the anaplastic lymphoma kinase (ALK). Pigment Cell Melanoma Res 2024; 37:6-14. [PMID: 37475109 DOI: 10.1111/pcmr.13115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 07/22/2023]
Abstract
We describe the first cases of pediatric melanoma with ALK fusion gene arising within giant congenital melanocytic nevi. Two newborn boys presented with large pigmented nodular plaques and numerous smaller satellite nevi. Additional expansile nodules developed within both nevi and invasive melanomas were diagnosed before 10 months of age in both boys. Oncogenic driver mutations in NRAS and BRAF were absent in both cases. Instead, oncogenic ZEB2::ALK fusion genes were identified in both the nevus and melanoma developing within the nevus. In both cases, tumors were noted by ultrasound in utero, demonstrated significant nodularity at birth, and progressed to melanoma in the first year of life suggesting that congenital nevi with ALK fusion genes may behave more aggressively than those with other mutations. As ALK kinase inhibitors are effective against a range of tumors with similar ALK fusion kinases, identifying ALK fusion genes in congenital melanocytic nevi may provide an opportunity for targeted therapy.
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Affiliation(s)
- Ifeoma U Perkins
- Department of Pathology, University of Colorado School of Medicine, Denver, Colorado, USA
| | - Serena Y Tan
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Timothy H McCalmont
- Department of Dermatology, University of California, San Francisco, California, USA
- Department of Pathology, University of California, San Francisco, California, USA
- GS Dermatology Associates, Walnut Creek, California, USA
| | - Pauline M Chou
- Department of Pathology, Ann and Robert H. Lurie Children's Hospital of Chicago, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Thaddeus W Mully
- Department of Dermatology, University of California, San Francisco, California, USA
- Department of Pathology, University of California, San Francisco, California, USA
| | - Pedram Gerami
- Department of Pathology, Ann and Robert H. Lurie Children's Hospital of Chicago, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jason H Pomerantz
- Division of Plastic and Reconstructive Surgery, Department of Surgery, University of California, San Francisco, California, USA
- Department of Orofacial Sciences, Program in Craniofacial Biology, Eli and Edythe Broad Center of Regeneration Medicine, University of California, San Francisco, California, USA
| | - Miguel Reyes-Múgica
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Daniel M Balkin
- Department of Plastic & Oral Surgery, Boston's Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Lacey L Kruse
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Benjamin Huang
- Department of Pediatrics, University of California, San Francisco, California, USA
| | - Jennifer L Reichek
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Noopur Gangopadhyay
- Division of Plastic Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Simon Chiosea
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jared R Green
- Envision Radiology Associates of Hollywood, Joe DiMaggio Children's Hospital, Hollywood, Florida, USA
| | - Sarah L Chamlin
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Ilona J Frieden
- Department of Dermatology, University of California, San Francisco, California, USA
- Department of Pediatrics, University of California, San Francisco, California, USA
| | - Boris C Bastian
- Department of Dermatology, University of California, San Francisco, California, USA
- Department of Pathology, University of California, San Francisco, California, USA
| | - Iwei Yeh
- Department of Dermatology, University of California, San Francisco, California, USA
- Department of Pathology, University of California, San Francisco, California, USA
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6
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Torchia D, Happle R. Phacomatosis spilosebacea: A new name for a distinctive binary genodermatosis. J Am Acad Dermatol 2023; 89:764-773. [PMID: 33583608 DOI: 10.1016/j.jaad.2020.12.082] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/16/2020] [Accepted: 12/28/2020] [Indexed: 12/21/2022]
Abstract
Phacomatosis pigmentokeratotica (PPK) is defined by the association of papular nevus spilus arranged in a flag-like pattern and sebaceous nevus following Blaschko's lines. A systematic search of the worldwide literature retrieved 95 well-established PPK cases. An additional 30 cases were excluded for a number of reasons. Based on this study, we propose to rename PPK phacomatosis spilosebacea (PSS). Mosaic mutations of the HRAS gene are the only proven cause of PSS. The extracutaneous abnormalities of PSS result from various degrees of intermingling of Schimmelpenning syndrome and papular nevus spilus syndrome. PSS seems to be a condition at particularly high risk of developing basal cell carcinoma, urogenital malignancies, and vitamin D-resistant hypophosphatemic rickets. Extracutaneous abnormalities were detected in approximately 75% of PSS cases.
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Affiliation(s)
- Daniele Torchia
- Department of Dermatology, James Paget University Hospital, Gorleston-on-Sea, United Kingdom.
| | - Rudolf Happle
- Department of Dermatology, Medical Center-University of Freiburg, Freiburg, Germany
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7
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Fumero-Velázquez M, Hagstrom M, Dhillon S, Olivares S, Jennings LJ, Dittman D, Sukhanova M, Arva NC, Goldstein SD, Theos A, Pavlidakey P, Carr Z, Gerami P. Agminated presentation of fusion-driven melanocytic neoplasms. J Cutan Pathol 2023; 50:913-921. [PMID: 37407520 DOI: 10.1111/cup.14482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/09/2023] [Accepted: 05/31/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND The conventionally understood pathogenesis of agminated Spitz nevi includes a mosaic HRAS mutation followed by copy number gains in 11p. However, we have recently observed agminated presentations of fusion-driven melanocytic neoplasms. METHODS We retrieved cases from our database of benign fusion-induced melanocytic neoplasms with an agminated presentation. Both the primary lesion and the secondary lesion were sequenced. TERT-promoter mutational testing and the melanoma fluorescence in situ hybridization assay were also performed. RESULTS Three cases were included. Two had a PRKCA fusion (partners ATP2B4 and MPZL1) and one had a ZCCHC8::ROS1 fusion. None of the cases met morphologic or molecular criteria for malignancy. There was no evidence of tumor progression in secondary lesions. The same fusion was identified in the primary and secondary lesions. None of the patients developed evidence of nodal or systemic metastasis. CONCLUSIONS We present accumulating evidence that fusion-driven melanocytic neoplasms can present with an agminated presentation. The differential diagnosis of an agminated presentation versus a locally recurrent or potentially locally metastatic tumor is critical, and accurate diagnosis has significant prognostic and therapeutic consequences for the patient. As with HRAS mutations, fusion-driven melanocytic tumors may have an agminated presentation.
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Affiliation(s)
- Mónica Fumero-Velázquez
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Michael Hagstrom
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Soneet Dhillon
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Shantel Olivares
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Lawrence J Jennings
- Division of Molecular Pathology, Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - David Dittman
- Division of Molecular Pathology, Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Madina Sukhanova
- Division of Molecular Pathology, Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Nicoleta C Arva
- Department of Pathology, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, Chicago, Illinois, USA
| | - Seth D Goldstein
- Department of Surgery, Feinberg School of Medicine, Chicago, Illinois, USA
| | - Amy Theos
- Department of Dermatology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Peter Pavlidakey
- Department of Dermatology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Zachary Carr
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Pedram Gerami
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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8
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Polubothu S, Bender N, Muthiah S, Zecchin D, Demetriou C, Martin SB, Malhotra S, Travnickova J, Zeng Z, Böhm M, Barbarot S, Cottrell C, Davies O, Baselga E, Burrows NP, Carmignac V, Diaz JS, Fink C, Haenssle HA, Happle R, Harland M, Majerowski J, Vabres P, Vincent M, Newton-Bishop JA, Bishop DT, Siegel D, Patton EE, Topf M, Rajan N, Drolet B, Kinsler VA. PTPN11 Mosaicism Causes a Spectrum of Pigmentary and Vascular Neurocutaneous Disorders and Predisposes to Melanoma. J Invest Dermatol 2023; 143:1042-1051.e3. [PMID: 36566878 PMCID: PMC10602917 DOI: 10.1016/j.jid.2022.09.661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/07/2022] [Accepted: 09/22/2022] [Indexed: 12/24/2022]
Abstract
Phakomatosis pigmentovascularis is a diagnosis that denotes the coexistence of pigmentary and vascular birthmarks of specific types, accompanied by variable multisystem involvement, including CNS disease, asymmetrical growth, and a predisposition to malignancy. Using a tight phenotypic group and high-depth next-generation sequencing of affected tissues, we discover here clonal mosaic variants in gene PTPN11 encoding SHP2 phosphatase as a cause of phakomatosis pigmentovascularis type III or spilorosea. Within an individual, the same variant is found in distinct pigmentary and vascular birthmarks and is undetectable in blood. We go on to show that the same variants can cause either the pigmentary or vascular phenotypes alone, and drive melanoma development within pigmentary lesions. Protein structure modeling highlights that although variants lead to loss of function at the level of the phosphatase domain, resultant conformational changes promote longer ligand binding. In vitro modeling of the missense variants confirms downstream MAPK pathway overactivation and widespread disruption of human endothelial cell angiogenesis. Importantly, patients with PTPN11 mosaicism theoretically risk passing on the variant to their children as the germline RASopathy Noonan syndrome with lentigines. These findings improve our understanding of the pathogenesis and biology of nevus spilus and capillary malformation syndromes, paving the way for better clinical management.
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Affiliation(s)
- Satyamaanasa Polubothu
- Mosaicism and Precision Medicine Laboratory, The Francis Crick Institute, London, United Kingdom; Paediatric Dermatology, Great Ormond Street Hospital, London, United Kingdom; Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Nicole Bender
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Siobhan Muthiah
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Davide Zecchin
- Mosaicism and Precision Medicine Laboratory, The Francis Crick Institute, London, United Kingdom; Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Charalambos Demetriou
- Mosaicism and Precision Medicine Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Sara Barberan Martin
- Mosaicism and Precision Medicine Laboratory, The Francis Crick Institute, London, United Kingdom; Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Sony Malhotra
- Scientific Computing Department, Science and Technology Facilities Council, Research Complex at Harwell, Harwell Oxford, United Kingdom
| | - Jana Travnickova
- MRC Human Genetics Unit and Cancer Research UK Edinburgh Centre, MRC Institute of Genetics & Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Zhiqiang Zeng
- MRC Human Genetics Unit and Cancer Research UK Edinburgh Centre, MRC Institute of Genetics & Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Markus Böhm
- Department of Dermatology, University of Münster, Münster, Germany
| | - Sebastien Barbarot
- Department of Dermatology, Centre Hospitalier Universitaire Nantes, Nantes, France
| | - Catherine Cottrell
- Institute for Genomic Medicine, Nationwide Childrens' Hospital, Columbus, USA
| | - Olivia Davies
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Eulalia Baselga
- Department of Dermatology, SJD Barcelona Children's Hospital, Barcelona, Spain
| | - Nigel P Burrows
- Department of Dermatology, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Virginie Carmignac
- Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France
| | - Joey Santiago Diaz
- Section of Epidemiology and Biostatistics, Leeds Institute of Cancer and Pathology, Cancer Research UK Clinical Centre at Leeds, St James's University Hospital, Leeds, United Kingdom; Department of Statistics, College of Science, Central Luzon State University, Science City of Munoz, Philippines; Department of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Manila Ermita, Manila, Philippines
| | - Christine Fink
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | - Holger A Haenssle
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | - Rudolf Happle
- Department of Dermatology, Medical Center, University of Freiburg, Freiburg, Germany
| | - Mark Harland
- Section of Epidemiology and Biostatistics, Leeds Institute of Cancer and Pathology, Cancer Research UK Clinical Centre at Leeds, St James's University Hospital, Leeds, United Kingdom
| | - Jacquelyn Majerowski
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Pierre Vabres
- Génétique des Anomalies du Développement, Université de Bourgogne, Dijon, France; Department of Dermatology, CHU Dijon, Dijon, France
| | - Marie Vincent
- Department of Dermatology, Centre Hospitalier Universitaire Nantes, Nantes, France
| | - Julia A Newton-Bishop
- Division of Haematology and Immunology, Leeds Institute of Medical Research, Leeds, United Kingdom
| | - D Tim Bishop
- Division of Haematology and Immunology, Leeds Institute of Medical Research, Leeds, United Kingdom
| | - Dawn Siegel
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - E Elizabeth Patton
- MRC Human Genetics Unit and Cancer Research UK Edinburgh Centre, MRC Institute of Genetics & Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Maya Topf
- Centre for Structural Systems Biology, Leibniz-Institut für Virologie (LIV) and Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Neil Rajan
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Beth Drolet
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Veronica A Kinsler
- Mosaicism and Precision Medicine Laboratory, The Francis Crick Institute, London, United Kingdom; Paediatric Dermatology, Great Ormond Street Hospital, London, United Kingdom; Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.
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9
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Yeh I. Melanocytic naevi, melanocytomas and emerging concepts. Pathology 2023; 55:178-186. [PMID: 36642570 DOI: 10.1016/j.pathol.2022.12.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 12/28/2022]
Abstract
With the elucidation of the genetics of melanocytic tumours, new concepts have emerged. An important one is the identification of 'intermediate' melanocytic tumours, those with genetic progression events beyond those of melanocytic naevi but that are not fully malignant. Thus, melanocytic tumours exist on a genetic spectrum that likely corresponds to biological behaviour. There are multiple pathways to melanoma development with different initiating events and characteristic benign melanocytic neoplasms and the precise placement of tumours on these pathways remains to be established and the corresponding risks of progression quantified. In this review, I discuss the classification of melanocytic naevi based on clinical, histopathological and genetic features, as well as the concept of melanocytomas with discussion of specific recognisable subtypes.
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Affiliation(s)
- Iwei Yeh
- Departments of Dermatology and Pathology, University of California, San Francisco, CA, USA.
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10
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Hagstrom M, Fumero-Velázquez M, Dhillon S, Olivares S, Gerami P. An update on genomic aberrations in Spitz naevi and tumours. Pathology 2023; 55:196-205. [PMID: 36631338 DOI: 10.1016/j.pathol.2022.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/28/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022]
Abstract
Spitz neoplasms continue to be a diagnostic challenge for dermatopathologists and are defined by distinctive morphological and genetic features. With the recent advancements in genomic sequencing, the classification, diagnosis, and prognostication of these tumours have greatly improved. Several subtypes of Spitz neoplasms have been identified based on their specific genomic aberrations, which often correlate with distinctive morphologies and biological behaviour. These genetic driver events can be classified into four major groups, including: (1) mutations [HRAS mutations (with or without 11p amplification) and 6q23 deletions]; (2) tyrosine kinase fusions (ROS1, ALK, NTRK1-3, MET and RET); (3) serine/threonine kinase fusions and mutations (BRAF, MAP3K8, and MAP2K1); and (4) other rare genomic aberrations. These driver genomic events are hypothesised to enable the initial proliferation of melanocytes and are often accompanied by additional genomic aberrations that affect biological behaviour. The discovery of theses genomic fusions has allowed for a more objective definition of a Spitz neoplasm. Further studies have shown that the majority of morphologically Spitzoid appearing melanocytic neoplasms with aggressive behaviour are in fact BRAF or NRAS mutated tumours mimicking Spitz. Truly malignant fusion driven Spitz neoplasms may occur but are relatively uncommon, and biomarkers such as homozygous 9p21 (CDKN2A) deletions or TERT-p mutations can have some prognostic value in such cases. In this review, we discuss the importance and various methods of identifying Spitz associated genomic fusions to help provide more definitive classification. We also discuss characteristic features of the various fusion subtypes as well as prognostic biomarkers.
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Affiliation(s)
- Michael Hagstrom
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Mónica Fumero-Velázquez
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Soneet Dhillon
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Shantel Olivares
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Pedram Gerami
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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11
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Cheng TW, Ahern MC, Giubellino A. The Spectrum of Spitz Melanocytic Lesions: From Morphologic Diagnosis to Molecular Classification. Front Oncol 2022; 12:889223. [PMID: 35747831 PMCID: PMC9209745 DOI: 10.3389/fonc.2022.889223] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/26/2022] [Indexed: 11/17/2022] Open
Abstract
Spitz tumors represent a distinct subtype of melanocytic lesions with characteristic histopathologic features, some of which are overlapping with melanoma. More common in the pediatric and younger population, they can be clinically suspected by recognizing specific patterns on dermatoscopic examination, and several subtypes have been described. We now classify these lesions into benign Spitz nevi, intermediate lesions identified as “atypical Spitz tumors” (or Spitz melanocytoma) and malignant Spitz melanoma. More recently a large body of work has uncovered the molecular underpinning of Spitz tumors, including mutations in the HRAS gene and several gene fusions involving several protein kinases. Here we present an overarching view of our current knowledge and understanding of Spitz tumors, detailing clinical, histopathological and molecular features characteristic of these lesions.
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Affiliation(s)
- Tiffany W. Cheng
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States
| | - Madeline C. Ahern
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States
| | - Alessio Giubellino
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, United States
- *Correspondence: Alessio Giubellino,
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12
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Dal Pozzo CA, Cappellesso R. The Morpho-Molecular Landscape of Spitz Neoplasms. Int J Mol Sci 2022; 23:ijms23084211. [PMID: 35457030 PMCID: PMC9030540 DOI: 10.3390/ijms23084211] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 12/14/2022] Open
Abstract
Spitz neoplasms are a heterogeneous group of melanocytic proliferations with a great variability in the histological characteristics and in the biological behavior. Thanks to recent discoveries, the morpho-molecular landscape of Spitz lineage is becoming clearer, with the identification of subtypes with recurrent features thus providing the basis for a more solid and precise tumor classification. Indeed, specific mutually exclusive driver molecular events, namely HRAS or MAP2K1 mutations, copy number gains of 11p, and fusions involving ALK, ROS, NTRK1, NTRK2, NTRK3, MET, RET, MAP3K8, and BRAF genes, correlate with distinctive histological features. The accumulation of further molecular aberrations, instead, promotes the increasing malignant transformation of Spitz neoplasms. Thus, the detection of a driver genetic alteration can be achieved using the appropriate diagnostic tests chosen according to the histological characteristics of the lesion. This allows the recognition of subtypes with aggressive behavior requiring further molecular investigations. This review provides an update on the morpho-molecular correlations in Spitz neoplasms.
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Affiliation(s)
- Carlo Alberto Dal Pozzo
- Surgical Pathology and Cytopathology Unit, Department of Medicine (DIMED), University of Padua, 35121 Padua, Italy;
| | - Rocco Cappellesso
- Pathological Anatomy Unit, University Hospital of Padua, 35121 Padua, Italy
- Correspondence: ; Tel.: +39-049-8217962
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13
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Kervarrec T, Pissaloux D, Tirode F, Samimi M, Jacquemus J, Castillo C, de la Fouchardière A. Morphologic features in a series of 352 Spitz melanocytic proliferations help predict their oncogenic drivers. Virchows Arch 2021; 480:369-382. [PMID: 34761304 DOI: 10.1007/s00428-021-03227-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/20/2021] [Accepted: 10/25/2021] [Indexed: 12/21/2022]
Abstract
Spitz nevi are indolent melanocytic tumors arising preferentially during and after childhood. Over the last decades, recurrent oncogenic drivers, sparsely detected in melanoma, were identified in Spitz melanocytic proliferations. Therefore, the detection of such drivers appears as a relevant diagnostic tool to distinguish both entities. Interestingly, morphologic features might correlate with the oncogenic drivers. Thus, the goal of this study was to assess the performances of previously identified morphological criteria to predict the presence of specific drivers. In total, 352 Spitz melanocytic proliferations either with a genetically identified oncogenic driver or investigated for ALK, ROS1, and NTRK1 overexpression by immunohistochemistry were enrolled in the present study. The microscopic features of the cases were assessed blindly with regards to the molecular status and, performances of previously described morphological criteria to predict the molecular status were assessed applying the likelihood-ratio test (LHR). Overall, an oncogenic driver was identified in 76% of the cases (n = 268/352). No microscopic features allowed the reliable prediction of ROS1- and NTRK1-overexpressing cases. By contrast, a plexiform pattern can contribute to the recognition of ALK-overexpressing cases (LHR(+) = 6.14). Importantly, the pseudo-schwannoma variant was highly suggestive of NTRK3-rearranged cases (LHR(+) = 43). Moreover, atypical/malignant tumor (LHR(+) = 5.18), severe cellular atypia (LHR(+) = 5.07), and p16 loss (LHR(+) = 14) contribute to the recognition of MAP3K8-rearranged cases, while the presence of a sheet-like architecture (LHR(+) = 5.39) and a marked fibrosis of the stroma (LHR(+)=5.06) were predictive of BRAF-fused tumors. To conclude, our study confirms ALK-overexpressing, NTRK3-, MAP3K8-, and BRAF-rearranged cases harbored distinct morphologic features allowing their microscopic recognition.
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Affiliation(s)
- Thibault Kervarrec
- Department of Biopathology, Center Léon Bérard, Lyon, France. .,Department of Pathology, Centre Hospitalier Universitaire de Tours, Tours, France. .,Biologie des infections à Polyomavirus team, INRA UMR 1282 ISP, Université de Tours, Tours, France.
| | - Daniel Pissaloux
- Department of Biopathology, Center Léon Bérard, Lyon, France.,Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Centre Léon Bérard, Université Claude Bernard Lyon 1, Université de Lyon, INSERM 1052, CNRS, 5286, Lyon, France
| | - Franck Tirode
- Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Centre Léon Bérard, Université Claude Bernard Lyon 1, Université de Lyon, INSERM 1052, CNRS, 5286, Lyon, France
| | - Mahtab Samimi
- Biologie des infections à Polyomavirus team, INRA UMR 1282 ISP, Université de Tours, Tours, France.,Department of Dermatology, Centre Hospitalier Universitaire de Tours, Tours, France
| | | | - Christine Castillo
- Department of Biopathology, Center Léon Bérard, Lyon, France.,Cypath Lyon, Villeurbanne, France
| | - Arnaud de la Fouchardière
- Department of Biopathology, Center Léon Bérard, Lyon, France.,Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Centre Léon Bérard, Université Claude Bernard Lyon 1, Université de Lyon, INSERM 1052, CNRS, 5286, Lyon, France
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14
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Kervarrec T, Briand C, Pissaloux D, Tirode F, Abasq-Thomas C, Fraitag S, de la Fouchardière A. Agminated Spitz naevus with an activating HRAS Q61R mutation. Pathology 2021; 54:374-376. [PMID: 34412857 DOI: 10.1016/j.pathol.2021.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/03/2021] [Accepted: 04/25/2021] [Indexed: 12/26/2022]
Affiliation(s)
- Thibault Kervarrec
- Department of Pathology, Centre Hospitalier Universitaire de Tours, Tours, France; Department of Biopathology, Center Léon Bérard, Lyon, France.
| | - Clémence Briand
- Department of Dermatology, Centre Hospitalier Universitaire de Brest, Brest, France
| | - Daniel Pissaloux
- Department of Pathology, Centre Hospitalier Universitaire de Tours, Tours, France; Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Lyon, France
| | - Franck Tirode
- Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Lyon, France
| | - Claire Abasq-Thomas
- Department of Dermatology, Centre Hospitalier Universitaire de Brest, Brest, France
| | - Sylvie Fraitag
- Department of Pathology, Institut Imagine, APHP, Hôpital Universitaire Necker-Enfants Malades, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Arnaud de la Fouchardière
- Department of Pathology, Centre Hospitalier Universitaire de Tours, Tours, France; Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Lyon, France
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15
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Robertson SJ, Orme L, Teixeira R, Shamassi M, Newell F, Patch AM, Yeh I, Gard G, Wilmott J, Jackett L, LeBoit P, Fellowes A, MacArthur G, Fox S, Hayward NK, Bastian B, Scolyer R, Waddell N, Penington A, Shackleton M. Evaluation of Crizotinib Treatment in a Patient With Unresectable GOPC-ROS1 Fusion Agminated Spitz Nevi. JAMA Dermatol 2021; 157:836-841. [PMID: 34076666 DOI: 10.1001/jamadermatol.2021.0025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Importance Spitz nevi are benign melanocytic neoplasms that classically present in childhood. Isolated Spitz nevi have been associated with oncogenic gene fusions in approximately 50% of cases. The rare agminated variant of Spitz nevi, thought to arise from cutaneous genetic mosaicism, is characterized by development of clusters of multiple lesions in a segmental distribution, which can complicate surgical removal. Somatic single-nucleotide variants in the HRAS oncogene have been described in agminated Spitz nevi, most of which were associated with an underlying nevus spilus. The use of targeted medical therapy for agminated Spitz nevi is not well understood. Observations A girl aged 30 months presented with facial agminated Spitz nevi that recurred rapidly and extensively after surgery. Owing to the morbidity of further surgery, referral was made to a molecular tumor board. The patient's archival nevus tissue was submitted for extended immunohistochemical analysis and genetic sequencing. Strong ROS1 protein expression was identified by immunohistochemistry. Consistent with this, analysis of whole-genome sequencing data revealed GOPC-ROS1 fusions. These results indicated likely benefit from the oral tyrosine kinase inhibitor crizotinib, which was administered at a dosage of 280 mg/m2 twice daily. An excellent response was observed in all lesions within 5 weeks, with complete flattening after 20 weeks. Conclusions and Relevance Given the response following crizotinib treatment observed in this case, the kinase fusion was believed to be functionally consequential in the patient's agminated Spitz nevi and likely the driver mutational event for growth of her nevi. The repurposing of crizotinib for GOPC-ROS1 Spitz nevi defines a new treatment option for these lesions, particularly in cases for which surgery is relatively contraindicated.
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Affiliation(s)
- Susan J Robertson
- Department of Dermatology, The Royal Children's Hospital, The Royal Melbourne Hospital and Monash Medical Centre, Melbourne, Australia.,Murdoch Children's Research Institute, Melbourne, Australia
| | - Lisa Orme
- Department of Oncology, The Royal Children's Hospital, Melbourne, Australia.,Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Rodrigo Teixeira
- Department of Plastic Surgery, The Royal Children's Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Maryam Shamassi
- Department of Anatomical Pathology, The Royal Children's Hospital, Melbourne, Australia
| | - Felicity Newell
- Department of Genetics and Computational Biology, QIMR (Queensland Institute of Medical Research) Berghofer Medical Research Institute, Brisbane, Australia
| | - Ann-Marie Patch
- Department of Genetics and Computational Biology, QIMR (Queensland Institute of Medical Research) Berghofer Medical Research Institute, Brisbane, Australia
| | - Iwei Yeh
- Helen Diller Family Comprehensive Cancer Center, Departments of Dermatology and Pathology, University of California, San Francisco
| | - Grace Gard
- Department of Medical Oncology, Alfred Health, Melbourne, Australia
| | - James Wilmott
- Melanoma Institute Australia, University of Sydney, Sydney, Australia
| | - Louise Jackett
- Melanoma Institute Australia, University of Sydney, Sydney, Australia.,Sydney Medical School, University of Sydney, Sydney, Australia.,Royal Prince Alfred Hospital, Camperdown, Australia
| | - Philip LeBoit
- Helen Diller Family Comprehensive Cancer Center, Departments of Dermatology and Pathology, University of California, San Francisco
| | | | | | - Stephen Fox
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Nicholas K Hayward
- Department of Genetics and Computational Biology, QIMR (Queensland Institute of Medical Research) Berghofer Medical Research Institute, Brisbane, Australia
| | - Boris Bastian
- Helen Diller Family Comprehensive Cancer Center, Departments of Dermatology and Pathology, University of California, San Francisco
| | - Richard Scolyer
- Melanoma Institute Australia, University of Sydney, Sydney, Australia.,Sydney Medical School, University of Sydney, Sydney, Australia.,Royal Prince Alfred Hospital, Camperdown, Australia
| | - Nicola Waddell
- Department of Genetics and Computational Biology, QIMR (Queensland Institute of Medical Research) Berghofer Medical Research Institute, Brisbane, Australia
| | - Anthony Penington
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Plastic Surgery, The Royal Children's Hospital, Melbourne, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Mark Shackleton
- Peter MacCallum Cancer Centre, Melbourne, Australia.,Department of Medical Oncology, Alfred Health, Melbourne, Australia.,Central Clinical School, Monash University, Melbourne, Australia
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16
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Goto K, Pissaloux D, Kauer F, Huriet V, Tirode F, de la Fouchardière A. GOPC-ROS1 mosaicism in agminated Spitz naevi: report of two cases. Virchows Arch 2021; 479:559-564. [PMID: 33733342 DOI: 10.1007/s00428-020-02992-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 12/06/2020] [Accepted: 12/08/2020] [Indexed: 02/02/2023]
Abstract
Spitz tumors are genetically associated with activating HRAS point mutations or fusions of either ALK, ROS1, NTRK1, NTRK3, RET, MET, MERTK, LCK, BRAF, MAP3K8, or MAP3K3. All these driver gene alterations are mutually exclusive. We report two cases of agminated Spitz naevi with a GOPC-ROS1 fusion. Both cases occurred on the lower limb of young adults. Since adolescence, pigmented or pink-colored papules have been periodically arising in a limited area of skin. In one case, an ill-defined hyperpigmented macule known since childhood was present in the background. Morphologically, at least five lesions were analyzed from each patient. In one case, all were predominantly junctional pigmented Spitz naevi, and in the other case, all were compound unpigmented Spitz naevi. No atypical features were present. RNA-sequencing revealed a GOPC-ROS1 gene translocation in both cases. Split signals of ROS1 gene in fluorescence in situ hybridization were observed not only in the nests of spitzoid melanocytes but also in the bland basal melanocytes surrounding the proliferations. These findings suggest the presence of a GOPC-ROS1 mosaicism in melanocytes with further emergence of agminated Spitz naevi potentially triggered by other genetic alterations. This expands the spectrum of genetic anomalies described in agminated Spitz naevi and our understanding of the mechanisms involved in their emergence.
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Affiliation(s)
- Keisuke Goto
- Department of Pathology, Tokyo Metropolitan Cancer and Infectious Disease Center Komagome Hospital, Tokyo, Japan.,Department of Pathology, Itabashi Central Clinical Laboratory, Tokyo, Japan.,Department of Diagnostic Pathology, Shizuoka Cancer Center Hospital, Nagaizumi, Japan.,Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka, Japan.,Department of Dermatology, Hyogo Cancer Center, Akashi, Japan
| | - Daniel Pissaloux
- Department of Biopathology, Center Léon Bérard, 28, rue Laennec, 69008, Lyon, France.,Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Lyon, France
| | | | | | - Franck Tirode
- Department of Biopathology, Center Léon Bérard, 28, rue Laennec, 69008, Lyon, France.,Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Lyon, France
| | - Arnaud de la Fouchardière
- Department of Biopathology, Center Léon Bérard, 28, rue Laennec, 69008, Lyon, France. .,Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Lyon, France.
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17
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Roy SF, Bastian BC, Maguiness S, Giubellino A, Vemula SS, McCalmont TH, Yeh I. Multiple desmoplastic Spitz nevi with BRAF fusions in a patient with ring chromosome 7 syndrome. Pigment Cell Melanoma Res 2021; 34:987-993. [PMID: 33522711 DOI: 10.1111/pcmr.12963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/04/2021] [Accepted: 01/25/2021] [Indexed: 11/29/2022]
Abstract
Patients with non-supernumerary ring chromosome 7 syndrome have an increased incidence of hemangiomas, café-au-lait spots, and melanocytic nevi. The mechanism for the increased incidence of these benign neoplasms is unknown. We present the case of a 22-year-old man with ring chromosome 7 and multiple melanocytic nevi. Two nevi, one on the right ear and the other on the right knee, were biopsied and diagnosed as desmoplastic Spitz nevi. Upon targeted next-generation DNA sequencing, both harbored BRAF fusions. Copy number alterations and fluorescence in situ hybridization (FISH) for BRAF suggested that the fusions arose on the ring chromosome 7. Hence, one reason for increased numbers of nevi in patients with non-supernumerary ring chromosome 7 syndrome may be increased likelihood of BRAF fusions, due to the instability of the ring chromosome.
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Affiliation(s)
- Simon F Roy
- Department of Pathology, University of Montréal, Montréal, OC, Canada
| | - Boris C Bastian
- Department of Dermatology, University of California in San Francisco, San Francisco, CA, USA.,Department of Pathology, University of California in San Francisco, San Francisco, CA, USA
| | - Sheilagh Maguiness
- Department of Dermatology, University of Minnesota, Minneapolis, MN, USA
| | - Alessio Giubellino
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Swapna S Vemula
- Department of Pathology, University of California in San Francisco, San Francisco, CA, USA
| | - Timothy H McCalmont
- Department of Dermatology, University of California in San Francisco, San Francisco, CA, USA.,Department of Pathology, University of California in San Francisco, San Francisco, CA, USA
| | - Iwei Yeh
- Department of Dermatology, University of California in San Francisco, San Francisco, CA, USA.,Department of Pathology, University of California in San Francisco, San Francisco, CA, USA
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18
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Goto K, Pissaloux D, Durand L, Tirode F, Guillot B, de la Fouchardière A. Novel three-way complex rearrangement of TRPM1-PUM1-LCK in a case of agminated Spitz nevi arising in a giant congenital hyperpigmented macule. Pigment Cell Melanoma Res 2020; 33:767-772. [PMID: 32386465 DOI: 10.1111/pcmr.12884] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/06/2020] [Accepted: 04/20/2020] [Indexed: 11/28/2022]
Abstract
The genetic anomalies associated with the agminated variant of Spitz nevus have so far been limited to HRAS G13R mutations, especially when arising within a nevus spilus. A previous report exposed the case of a man with a giant pigmented macule involving his upper right limb and trunk. Since childhood, Spitz nevi have been periodically arising, within the pigmented area. The histopathology of several lesions displayed the usual criteria of junctional, compound, or intradermal Spitz nevi with a diversity of cytomorphological and architectural features. Some lesions spontaneously regressed. Genetic studies confirmed in three lesions an identical translocation involving TRPM1, PUM1, and LCK. No mutations in HRAS, NRAS, BRAF, or other known fusion genes linked to Spitz nevus were detected. LCK break-apart fluorescence in situ hybridization confirmed the rearrangement was present not only in the melanocytic proliferation but also in the surrounding non-spitzoid melanocytes. This report expands the list of genetic alterations involved both in giant congenital macules and in agminated Spitz nevi, and also extends the concept of mosaicism in melanocytes to gene translocations.
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Affiliation(s)
- Keisuke Goto
- Department of Pathology, Tokyo Metropolitan Cancer and Infectious Disease Center Komagome Hospital, Tokyo, Japan.,Department of Diagnostic Pathology, Shizuoka Cancer Center Hospital, Nagaizumi, Japan.,Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka, Japan.,Department of Dermatology, Hyogo Cancer Center, Akashi, Japan
| | - Daniel Pissaloux
- Department of Biopathology, Center Léon Bérard, Lyon, France.,INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | | | - Franck Tirode
- Department of Biopathology, Center Léon Bérard, Lyon, France.,INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Bernard Guillot
- Department of Dermatology, Saint Eloi University Hospital, CHU Montpellier, Montpellier, France
| | - Arnaud de la Fouchardière
- Department of Biopathology, Center Léon Bérard, Lyon, France.,INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Equipe Labellisée Ligue contre le Cancer, Université de Lyon, Université Claude Bernard Lyon 1, Lyon, France
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19
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Spitz Nevus and Other Spitzoid Tumors in Children. Part 2: Cytogenetic and Molecular Features. Prognosis and Treatment. ACTAS DERMO-SIFILIOGRAFICAS 2020. [DOI: 10.1016/j.adengl.2019.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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20
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Yeh I. New and evolving concepts of melanocytic nevi and melanocytomas. Mod Pathol 2020; 33:1-14. [PMID: 31659277 DOI: 10.1038/s41379-019-0390-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 02/07/2023]
Abstract
In daily clinical practice melanocytic nevi are commonly encountered. Traditionally, both benign and malignant melanocytic tumors have been sub-classified by their histopathologic characteristics with differing criteria for malignancy applied to each group. Recently, many of the mutations that initiate nevus formation have been identified and specific sets of mutations are found in different subtypes of nevi. Whereas a single mutation appears sufficient to initiate a nevus, but is not enough to result in melanoma, specific combinations of mutations have been identified in some melanocytic tumors that are regarded to be of low biologic potential. The term "melanocytoma" has recently been proposed by the World Health Organization to describe those tumors that demonstrate genetic progression beyond the single mutations that are found in nevi but are not frankly malignant. Melanocytomas occupy intermediate genetic stages between nevus and melanoma and likely have an increased risk of malignant transformation as compared to nevi. This review provides an update on the broad spectrum of melanocytic nevi and melanocytomas and outlines their key histopathologic and genetic features.
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Affiliation(s)
- Iwei Yeh
- Departments of Dermatology and Pathology, University of California, San Francisco, 1701 Divisadero St. Ste. 280, San Francisco, CA, 94143, USA.
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21
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Sainz-Gaspar L, Sánchez-Bernal J, Noguera-Morel L, Hernández-Martín A, Colmenero I, Torrelo A. Spitz Nevus and Other Spitzoid Tumors in Children. Part 2: Cytogenetic and Molecular Features. Prognosis and Treatment. ACTAS DERMO-SIFILIOGRAFICAS 2019; 111:20-25. [PMID: 31739993 DOI: 10.1016/j.ad.2019.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 02/03/2019] [Indexed: 12/25/2022] Open
Abstract
Melanocytic neoplasms with spitzoid morphology (Spitz nevi, atypical Spitz tumors, and spitzoid melanomas) may be benign or malignant. Because the malignant potential of atypical Spitz tumors is uncertain, the proper therapeutic approach has been much debated over the years. Promising new techniques for molecular analysis have enabled better predictions of the biological behavior of these tumors. We review their cytogenetic features and prognosis and also provide an update of the most recent recommendations for management.
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Affiliation(s)
- L Sainz-Gaspar
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España
| | - J Sánchez-Bernal
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España
| | - L Noguera-Morel
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España
| | - A Hernández-Martín
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España
| | - I Colmenero
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España
| | - A Torrelo
- Servicio de Dermatología y Anatomía Patológica, Hospital Infantil Universitario del Niño Jesús, Madrid, España.
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22
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Eichenfield DZ, Cotter D, Thorson J, Hinds B, Sun BK. Agminated blue nevus with a GNAQ mutation: A case report and review of the literature. J Cutan Pathol 2018; 46:130-133. [PMID: 30315589 DOI: 10.1111/cup.13373] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 09/07/2018] [Accepted: 10/08/2018] [Indexed: 01/17/2023]
Abstract
Agminated blue nevi are dermal melanocytic proliferations that classically present as dark blue macules or papules in a grouped, linear, or blaschkoid distribution. In their more common sporadic form, blue nevi manifest in young adulthood as solitary blue papules or macules on the scalp, face, hands, or feet. By contrast, agminated blue nevi tend to manifest earlier in life, and are distributed more evenly across anatomic sites. Recent studies have identified mutations in sporadic blue nevi in the genes encoding G Protein subunit alpha Q and G protein subunit alpha 11 (GNAQ and GNA11). It is unknown whether agminated blue nevi share the same genetic changes. In the present paper, we present a case of agminated blue nevus on the wrist, and identify an activating mutation (c.626A > T, p.Glu209Leu) in GNAQ. We hypothesize that GNAQ/GNA11 activating mutations arising earlier during development may trigger agminated blue nevi, explaining the broader field of involvement in these cutaneous lesions.
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Affiliation(s)
- Dawn Z Eichenfield
- Department of Dermatology, University of California, San Diego, California
| | - David Cotter
- Department of Dermatology, University of California, San Diego, California
| | - John Thorson
- Department of Pathology, University of California, San Diego, California
| | - Brian Hinds
- Department of Dermatology, University of California, San Diego, California
| | - Bryan K Sun
- Department of Dermatology, University of California, San Diego, California
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23
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Rare Variant of Agminated Spitz Nevi on a Hypopigmented Background and Segmental Distribution: Case Report and Review of Literature. Am J Dermatopathol 2018. [DOI: 10.1097/dad.0000000000001135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Nemeth K, Szabo S, Cottrell C, McNulty S, Segura A, Sokumbi O, Browning M, Siegel D. Mosaic pathogenic HRAS
variant in a patient with nevus spilus with agminated Spitz nevi and parametrial-uterine rhabdomyosarcoma. Br J Dermatol 2018; 178:804-806. [DOI: 10.1111/bjd.16155] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- K. Nemeth
- Department of Dermatology; Medical College of Wisconsin; Milwaukee WI U.S.A
| | - S. Szabo
- Division of Pathology; Department of Pediatrics; Cincinnati Children's Hospital Medical Center; Cincinnati OH U.S.A
| | - C.E. Cottrell
- Institute for Genomic Medicine; Nationwide Children's Hospital; Columbus OH U.S.A
| | - S.M. McNulty
- Department of Pathology and Immunology; Washington University School of Medicine; St. Louis MO U.S.A
| | - A. Segura
- Department of Pathology; Medical College of Wisconsin; Milwaukee WI U.S.A
| | - O. Sokumbi
- Department of Dermatology; Medical College of Wisconsin; Milwaukee WI U.S.A
- Department of Pathology; Medical College of Wisconsin; Milwaukee WI U.S.A
| | - M. Browning
- Department of Pediatrics; Medical College of Wisconsin; Milwaukee WI U.S.A
- Section of Hematology/Oncology/Blood & Marrow Transplant; Medical College of Wisconsin; Milwaukee WI U.S.A
| | - D.H. Siegel
- Department of Dermatology; Medical College of Wisconsin; Milwaukee WI U.S.A
- Department of Pediatrics; Medical College of Wisconsin; Milwaukee WI U.S.A
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25
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Porubsky C, Teer JK, Zhang Y, Deschaine M, Sondak VK, Messina JL. Genomic analysis of a case of agminated Spitz nevi and congenital-pattern nevi arising in extensive nevus spilus. J Cutan Pathol 2017; 45:180-183. [PMID: 29210482 DOI: 10.1111/cup.13082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 11/02/2017] [Accepted: 11/17/2017] [Indexed: 12/30/2022]
Abstract
Nevus spilus is a melanocytic neoplasm characterized by a tan macular background punctuated by multiple hyperpigmented macules or papules that represent various types of nevi. These include junctional and compound nevi, Spitz nevi, and rarely blue nevi. We report a unique case of widespread, multiple nevi spili giving rise to agminated Spitz nevi and congenital-pattern compound nevi. We performed genetic analysis to further characterize the mutational profile of this rare entity.
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Affiliation(s)
- Caitlin Porubsky
- Department of Dermatology, PCOM Mednet/North Fulton Hospital Medical Campus, Roswell, Georgia
| | - Jamie K Teer
- Department of Biostatistics and Bioinformatics, Moffitt Cancer Center, Tampa, Florida.,Department of Anatomic Pathology, Moffitt Cancer Center, Tampa, Florida
| | - Yonghong Zhang
- Department of Biostatistics and Bioinformatics, Moffitt Cancer Center, Tampa, Florida
| | - Maria Deschaine
- Department of Anatomic Pathology, Moffitt Cancer Center, Tampa, Florida
| | - Vernon K Sondak
- Department of Cutaneous Oncology, Moffitt Cancer Center, Tampa, Florida
| | - Jane L Messina
- Department of Anatomic Pathology, Moffitt Cancer Center, Tampa, Florida.,Department of Cutaneous Oncology, Moffitt Cancer Center, Tampa, Florida
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26
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Kinsler VA, Larue L. The patterns of birthmarks suggest a novel population of melanocyte precursors arising around the time of gastrulation. Pigment Cell Melanoma Res 2017; 31:95-109. [PMID: 28940934 PMCID: PMC5765478 DOI: 10.1111/pcmr.12645] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 09/18/2017] [Indexed: 12/17/2022]
Abstract
Systematic work in the mouse and chicken has mapped out two neural crest-derived pathways of melanocyte precursor migration. With these in mind, this study reappraises the patterns of congenital pigmentary disorders in humans and identifies three recurrent patterns consistent across genetically different diseases. Only two of these are seen in diseases known to be melanocyte cell-autonomous. The segmental pattern correlates well with the classical dorsolateral population from animal studies, demonstrating respect of the midline, cranio-caudal axial mixing, unilateral migration and involvement of key epidermally derived structures. Importantly however, the melanocyte precursors responsible for the non-segmental pattern, which demonstrates circular, bilateral migration centred on the midline, and not involving key epidermally derived structures, have not been identified previously. We propose that this population originates around the time of gastrulation, most likely within the mesoderm, and ultimately resides within the dermis. Whether it contributes to mature melanocytes in non-disease states is not known; however, parallels with the patterns of acquired vitiligo would suggest that it does. The third pattern, hypo- or hyperpigmented fine and whorled Blaschko's lines, is proposed to be non-cell-autonomous.
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Affiliation(s)
- Veronica A Kinsler
- Genetics and Genomic Medicine, UCL Institute of Child Health, London, UK.,Paediatric Dermatology, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Lionel Larue
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,Univ Paris-Sud, Univ Paris-Saclay, CNRS UMR 3347, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
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27
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Spitz nevi and Spitzoid melanomas: exome sequencing and comparison with conventional melanocytic nevi and melanomas. Mod Pathol 2017; 30:640-649. [PMID: 28186096 PMCID: PMC5413430 DOI: 10.1038/modpathol.2016.237] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 12/12/2016] [Accepted: 12/12/2016] [Indexed: 01/01/2023]
Abstract
We performed exome sequencing of 77 melanocytic specimens composed of Spitz nevi (n=29), Spitzoid melanomas (n=27), and benign melanocytic nevi (n=21), and compared the results with published melanoma sequencing data. Our study highlights the prominent similarity between Spitzoid and conventional melanomas with similar copy number changes and high and equal numbers of ultraviolet-induced coding mutations affecting similar driver genes. Mutations in MEN1, PRKAR1A, and DNMT3A in Spitzoid melanomas may indicate involvement of the protein kinase A pathway, or a role of DNA methylation in the disease. Other than activating HRAS variants, there were few additional mutations in Spitz nevi, and few copy number changes other than 11p amplification and chromosome 9 deletions. Similarly, there were no large-scale copy number alterations and few somatic alterations other than activating BRAF or NRAS mutations in conventional nevi. A presumed melanoma driver mutation (IDH1Arg132Cys) was revealed in one of the benign nevi. In conclusion, our exome data show significantly lower somatic mutation burden in both Spitz and conventional nevi compared with their malignant counterparts, and high genetic similarity between Spitzoid and conventional melanoma.
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28
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Dika E, Ravaioli GM, Fanti PA, Neri I, Patrizi A. Spitz Nevi and Other Spitzoid Neoplasms in Children: Overview of Incidence Data and Diagnostic Criteria. Pediatr Dermatol 2017; 34:25-32. [PMID: 27874206 DOI: 10.1111/pde.13025] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Spitz nevi are benign melanocytic neoplasms characterized by epithelioid or spindle melanocytes or both. In some rare cases their presentation overlaps with the clinical and histopathologic features of malignant melanoma, so a differential diagnosis can be difficult to make. Intermediate forms between Spitz nevi and malignant melanoma, with unpredictable behavior, have been called atypical Spitz tumors. A literature search was performed to review the clinical, dermoscopic, genetic, and histopathologic aspects of spitzoid tumors. Spitz nevi mainly occur in children, with no predilection for sex, and in young women. Common sites are the head and lower arms, where Spitz nevi present as pink nodules or hyperpigmented plaques. Spitzoid lesions may have diverse dermoscopic patterns: vascular, starburst, globular, atypical, reticular, negative homogeneous, or targetoid. The management of spitzoid lesions can be invasive or conservative; surgical excision is usually reserved for those with doubtful features, whereas clinical and dermoscopic follow-up is preferred for typical pediatric Spitz nevi. The role of sentinel lymph node biopsy in atypical Spitz tumors is debated. Immunohistochemistry and new molecular techniques such as comparative genomic hybridization, polymerase chain reaction, and fluorescence in situ hybridization offer new diagnostic perspectives, investigating genetic alterations that are specific for malignant melanoma or for Spitz nevi.
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Affiliation(s)
- Emi Dika
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Giulia Maria Ravaioli
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Pier Alessandro Fanti
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Iria Neri
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Annalisa Patrizi
- Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
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29
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30
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Torchia D, Happle R. Segmental hypomelanosis and hypermelanosis arranged in a checkerboard pattern are distinct naevi: flag-like hypomelanotic naevus and flag-like hypermelanotic naevus. J Eur Acad Dermatol Venereol 2015; 29:2088-99. [DOI: 10.1111/jdv.13077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 01/07/2015] [Indexed: 11/27/2022]
Affiliation(s)
- D. Torchia
- Department of Dermatology; Queen Elizabeth Hospital; King's Lynn UK
| | - R. Happle
- Department of Dermatology; Freiburg University Medical Center; Freiburg Germany
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31
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Luo S, Tsao H. Epidermal, sebaceous, and melanocytic nevoid proliferations are spectrums of mosaic RASopathies. J Invest Dermatol 2015; 134:2493-2496. [PMID: 25219651 DOI: 10.1038/jid.2014.244] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Growing evidence demonstrates that various nevoid proliferations such as keratinocytic epidermal nevi and nevus sebaceous result from somatic mosaicism. Many of the mutations identified have been within the RAF/RAS/MAPK pathway, hence supporting the previously introduced term "mosaic RASopathy" for these nevi. In this issue, Kinsler et al. were among the first to characterize certain pigmented melanocytic nevi that may also fit this paradigm. To better frame these findings, we provide a summary of the analogous genotypic profiles for epidermal and melanocytic nevi from recent studies.
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Affiliation(s)
- Su Luo
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Hensin Tsao
- Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA; Wellman Center for Photomedicine and MGH Cancer Center, Massachusetts General Hospital, Boston, Massachusetts, USA.
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32
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Abstract
A new or changing melanocytic nevus in a child or adolescent often leads to concern in parents and physicians. To avoid undue alarm and unnecessary procedures, dermatologists should be aware of the natural history and clinical spectrum of nevi in pediatric patients, as well as findings that are potentially worrisome in this age group. This review provides an update on melanocytic nevi in children, focusing on their dynamic evolution over time, molecular insights into nevogenesis, and phenotypic markers for increased risk of melanoma in adolescence and adulthood. Special considerations for Spitz nevi and nevi located in particular sites (eg, scalp, acral, genital) are highlighted. Current understanding of the risks associated with congenital melanocytic nevi of different sizes and strategies for the management of children with numerous acquired nevi, Spitz nevi, and congenital nevi are also discussed.
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33
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NRAS-mutated melanocytic BAP1-associated intradermal tumor (MBAIT): a case report. Virchows Arch 2014; 466:117-21. [DOI: 10.1007/s00428-014-1674-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 10/09/2014] [Accepted: 10/14/2014] [Indexed: 11/26/2022]
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34
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Dubruc E, Balme B, Dijoud F, Disant F, Thomas L, Wang Q, Pissaloux D, de la Fouchardiere A. Mutated and amplifiedNRASin a subset of cutaneous melanocytic lesions with dermal spitzoid morphology: report of two pediatric cases located on the ear. J Cutan Pathol 2014; 41:866-72. [DOI: 10.1111/cup.12389] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/16/2014] [Accepted: 07/19/2014] [Indexed: 12/25/2022]
Affiliation(s)
- Estelle Dubruc
- Département de Biopathologie; Centre Léon Bérard; Lyon France
| | - Brigitte Balme
- Département de Pathologie; hôpital Lyon Sud; Lyon France
| | | | | | - Luc Thomas
- Service de Dermatologie Centre Hospitalier Lyon Sud; Pierre Bénite France
- Université Claude Bernard Lyon 1; Lyon France
| | - Qing Wang
- Département de Biopathologie; Centre Léon Bérard; Lyon France
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35
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Next-generation sequencing of nevus spilus-type congenital melanocytic nevus: exquisite genotype-phenotype correlation in mosaic RASopathies. J Invest Dermatol 2014; 134:2658-2660. [PMID: 24751729 PMCID: PMC4165863 DOI: 10.1038/jid.2014.195] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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36
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Sarin KY, McNiff JM, Kwok S, Kim J, Khavari PA. Activating HRAS mutation in nevus spilus. J Invest Dermatol 2014; 134:1766-1768. [PMID: 24390138 DOI: 10.1038/jid.2014.6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Kavita Y Sarin
- Department of Dermatology, Stanford University School of Medicine, Stanford, California, USA.
| | - Jennifer M McNiff
- Department of Dermatology, Yale Medical School, New Haven, Connecticut, USA
| | - Shirley Kwok
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Jinah Kim
- Department of Dermatology, Stanford University School of Medicine, Stanford, California, USA; Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Paul A Khavari
- Department of Dermatology, Stanford University School of Medicine, Stanford, California, USA; Dermatology Service, VA Palo Alto Health Care System, Palo Alto, California, USA
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