1
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Wakefield C, Hornick JL. Update on immunohistochemistry in bone and soft tissue tumors: Cost-effectively replacing molecular testing with immunohistochemistry. Hum Pathol 2024; 147:58-71. [PMID: 38135060 DOI: 10.1016/j.humpath.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 12/24/2023]
Abstract
Soft tissue tumors form part of a challenging domain in diagnostic pathology owing to their comparative rarity, astonishing histologic diversity, and overlap between entities. Many of these tumors are now known to be defined by highly recurrent, or, in some instances, unique molecular alterations. Insights from gene profiling continue to elucidate the wider molecular landscape of soft tissue tumors; many of these advances have been co-opted by immunohistochemistry (IHC) for diagnostic applications. There now exists a multitude of antibodies serving as surrogate markers of recurrent gene fusions, amplifications, and point mutations, which, in certain settings, can replace the need for more resource and time-intensive cytogenetic and molecular genetic analyses. IHC presents many advantages including rapid turnaround time, cost-effectiveness, and interpretative reproducibility. A sensible application of these immunohistochemical markers complemented by a working knowledge of the molecular pathogenesis of bone and soft tissue tumors permits accurate diagnosis in the majority of cases. In this review, we will outline some of these biomarkers while emphasizing molecular correlates and highlighting interpretative challenges and pitfalls.
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Affiliation(s)
- Craig Wakefield
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Jason L Hornick
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States.
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2
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Folpe AL. Vascular tumors of intermediate malignancy: An update. Hum Pathol 2024; 147:114-128. [PMID: 38360216 DOI: 10.1016/j.humpath.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 02/17/2024]
Abstract
The term "hemangioendothelioma" is used for endothelial neoplasms of intermediate malignancy and describes a group of rare neoplasms having biologic behavior falling in between that of the benign hemangiomas and fully malignant angiosarcomas. The hemangioendotheliomas fall into several specific, clinicopathologically and genetically distinct entities, specifically epithelioid hemangioendothelioma, kaposiform hemangioendothelioma, papillary intralymphatic angioendothelioma and retiform hemangioendothelioma (hobnailed hemangioendothelioma), pseudomyogenic hemangioendothelioma, composite hemangioendothelioma, and YAP1::TFE3-fused hemangioendothelioma. The clinical, morphologic, immunohistochemical, and genetic features, and the differential diagnosis of each of these rare entities are discussed in this review.
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Affiliation(s)
- Andrew L Folpe
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55902, United States.
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3
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Li B, Zhang C, Zhao L, Chen N, Hu Y, Li Z, Kang S, Blake A, Xiao S. Diverse clinical presentations of pseudomyogenic hemangioendothelioma associated with EGFL7::FOSB fusion: a second case. Histopathology 2024; 84:708-712. [PMID: 38012540 DOI: 10.1111/his.15108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/29/2023]
Affiliation(s)
- Bin Li
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Changliang Zhang
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd, Suzhou, China
| | - Lina Zhao
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd, Suzhou, China
| | - Nan Chen
- Molecular Genetics Laboratory, Suzhou Sano Precision Medicine Ltd, Suzhou, China
| | - Yongbin Hu
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiyuan Li
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Suya Kang
- Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Angella Blake
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sheng Xiao
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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4
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Ren D, Lou J, Wei K, Ifegwu I. Molecularly Confirmed Pseudomyogenic Hemangioendothelioma with Unusual EGFL7::FOSB Fusion in the Head and Neck Region of an Older Patient. Diagnostics (Basel) 2024; 14:342. [PMID: 38337858 PMCID: PMC10855081 DOI: 10.3390/diagnostics14030342] [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: 01/02/2024] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024] Open
Abstract
Pseudomyogenic hemangioendothelioma (PMHE), a rare vascular neoplasm, was first described in 1992 asa fibroma-like variant of epithelioid sarcoma, and would be termed as epithelioid sarcoma-like hemangioendothelioma a decade later due to its significant histologic overlap with epithelioid sarcoma and diffuse cytokeratin expression. PHME is currently defined as a distinct, potentially intermediate malignant, rarely metastasizing neoplasm with vascular/endothelial differentiation. It is characterized by young age (typically less than 40 years old), extremity location (approximately ~80%), and t(7:19) SERPINE1::FOSB fusion as the most common molecular alteration. Herein, we report a case of a 59-year-old male presenting with multifocal lesions, including in the right temporalis muscle, right frontoparietal calvarium, right pterygoid muscles, and right mandibular condyle. Histologic examination of the right temporal lesion revealed a multinodular biphasic lesion composed of sheets and fascicles of elongated spindle and epithelioid cells infiltrating into the adjacent skeletal muscle. Admixed abundant neutrophilic infiltration is noted; however, areas of necrosis, increased mitosis, nuclear atypia, or rhabdomyoblast-like cells are absent. Immunohistochemical (IHC) staining showed that the tumor cells were diffusely and strongly positive for FOSB, pan-cytokeratin (AE1/AE3), CD31, and ERG. Molecular testing demonstrated a t(9:19) EGFL7::FOSB fusion mRNA. This constellation of morphological, IHC and molecular findings was consistent with a diagnosis of PMHE. This is the first reported case of multifocal PMHE with EGFL7::FOSB fusion in the head and neck area of a patient aged more than 50 years old. Since the differential diagnoses for PMHE includes high-grade malignancies with aggressive clinical behavior, coupled with the rare reports of PMHE in the head and neck region, awareness of this tumor in the head and neck region will avoid the misdiagnosis and overtreatment of this entity.
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Affiliation(s)
- Dong Ren
- Departments of Pathology and Laboratory Medicine, University of California Irvine Medical Center, Orange, CA 92868, USA;
| | - Jerry Lou
- Departments of Pathology and Laboratory Medicine, University of California Irvine Medical Center, Orange, CA 92868, USA;
| | - Katherine Wei
- Departments of Radiology, University of California Irvine Medical Center, Orange, CA 92868, USA;
| | - Ibe Ifegwu
- Departments of Pathology and Laboratory Medicine, University of California Irvine Medical Center, Orange, CA 92868, USA;
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5
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Warmke LM, Collier CD, Davis JL. NR1D1::MAML1 epithelioid and spindle cell sarcoma mimicking pseudomyogenic hemangioendothelioma in core biopsy: A case report and review of the literature. Genes Chromosomes Cancer 2023; 62:655-662. [PMID: 37326138 DOI: 10.1002/gcc.23186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/17/2023] Open
Abstract
Epithelioid and spindle cell sarcomas with NR1D1::MAML1/2 gene fusions are rare and emerging entities. Only six cases of NR1D1-rearranged mesenchymal tumors have previously been reported in the literature; they are often characterized by an epithelioid morphology, at least focal pseudogland formation, prominent cytoplasmic vacuoles, and focal to diffuse immunohistochemical expression of keratin. We herein report the first case of an NR1D1::MAML1 epithelioid and spindle cell sarcoma with dual immunohistochemical expression of ERG and FOSB, mimicking a pseudomyogenic hemangioendothelioma (PHE) on core biopsy. The sarcoma arose in the left forearm of a 64-year-old man. Initial biopsy showed a mesenchymal neoplasm composed of epithelioid and spindle cells dispersed in myxoid stroma with scattered stromal neutrophils. The morphologic features, combined with the dual immunohistochemical expression of ERG and FOSB, initially mimicked PHE, representing an important potential diagnostic pitfall. The patient subsequently underwent a radical resection, which showed a much more diffuse epithelioid appearance with nested architecture and pseudogland formation. Next-generation sequencing was performed on the resection specimen, which revealed an NR1D1::MAML1 gene fusion, confirming the final diagnosis. Given the fully malignant potential of this tumor, knowledge and recognition of this rare entity are essential to ensure proper management, prevent misdiagnosis, and further characterize the clinical course of this emerging entity. Comprehensive molecular testing can help to identify these rare tumors and exclude the possibility of epithelioid mimics, including PHE.
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Affiliation(s)
- Laura M Warmke
- Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Christopher D Collier
- Department of Orthopedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jessica L Davis
- Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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6
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Saleh JS, Whittington CP, Bresler SC, Patel RM. Cutaneous vascular tumors: an updated review. Hum Pathol 2023; 140:53-65. [PMID: 37059271 DOI: 10.1016/j.humpath.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/30/2023] [Accepted: 04/06/2023] [Indexed: 04/16/2023]
Abstract
Cutaneous vascular tumors constitute a heterogeneous group of entities that share overlapping morphologic and immunohistochemical features, which can be diagnostically challenging for pathologists and dermatopathologists. Our understanding and knowledge of vascular neoplasms have improved over time, resulting in both a refinement of their classification by the International Society for the Study of Vascular Anomalies (ISSVA) and an improvement in the accurate diagnosis and clinical management of vascular neoplasms. This review article aims to summarize the updated clinical, histopathological, and immunohistochemical characteristics of cutaneous vascular tumors, as well as to highlight their associated genetic mutations. Such entities include infantile hemangioma, congenital hemangioma, tufted angioma, spindle cell hemangioma, epithelioid hemangioma, pyogenic granuloma, Kaposiform hemangioendothelioma, retiform hemangioendothelioma, pseudomyogenic hemangioendothelioma, Kaposi sarcoma, angiosarcoma, and epithelioid hemangioendothelioma.
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Affiliation(s)
- Jasmine S Saleh
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Scott C Bresler
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Dermatology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Rajiv M Patel
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Dermatology, University of Michigan, Ann Arbor, MI 48109, USA; Cutaneous Pathology, WCP Laboratories, Inc., Maryland Heights, MO 63043, USA.
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7
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Frecentese GI, Pantanowitz L, Patel RM, Bresler SC. A rare case of cellular epithelioid hemangioma involving the penis. J Cutan Pathol 2023; 50:97-100. [PMID: 35811482 DOI: 10.1111/cup.14285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/17/2022] [Accepted: 06/20/2022] [Indexed: 01/24/2023]
Affiliation(s)
| | - Liron Pantanowitz
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Rajiv M Patel
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA.,Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Scott C Bresler
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA.,Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
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8
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Subramaniam A, Giani C, Napolitano A, Ravi V, Frezza AM, Jones RL. Management of Vascular Sarcoma. Surg Oncol Clin N Am 2022; 31:485-510. [PMID: 35715146 DOI: 10.1016/j.soc.2022.03.014] [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] [Indexed: 11/18/2022]
Abstract
Vascular sarcomas encompass 3 well-defined sarcoma types: hemangioendothelioma, Kaposi sarcoma, and angiosarcoma. These distinct types are exceedingly rare and very different in terms of clinical behavior, biological features, and treatment approach. Because of this rarity and heterogeneity, it is crucial that vascular sarcomas are treated in sarcoma reference centers or networks, in order to ensure optimal management. The diversity of vascular sarcomas also needs to be taken into account in the design of clinical trials, in order to produce meaningful results that can be consistently translated into everyday clinical practice.
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Affiliation(s)
- Aparna Subramaniam
- Department of Sarcoma Medical Oncology, University of Texas MD Anderson Cancer Center, 1400 Holcombe Blvd, Unit 0450, FC12.3044, Houston, TX 77030, USA
| | - Claudia Giani
- Medical Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Via Giacomo Venezian 1, Milan 20133, Italy
| | - Andrea Napolitano
- Sarcoma Unit, The Royal Marsden NHS Foundation Trust, 203 Fulham Road, London SW3 6JJ, UK
| | - Vinod Ravi
- Department of Sarcoma Medical Oncology, University of Texas MD Anderson Cancer Center, 1400 Holcombe Blvd, Unit 0450, FC12.3044, Houston, TX 77030, USA.
| | - Anna Maria Frezza
- Medical Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Via Giacomo Venezian 1, Milan 20133, Italy
| | - Robin L Jones
- Sarcoma Unit, The Royal Marsden NHS Foundation Trust, 203 Fulham Road, London SW3 6JJ, UK
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Gersmann AK, Haller F, Behnert N, Richter A, Stöhr R, Hartmann A, Ströbel P, Bremmer F. Primary pseudomyogenic hemangioendothelioma of the testis with a novel POTEI::FOSB gene fusion. Histopathology 2022; 81:411-414. [PMID: 35582841 DOI: 10.1111/his.14697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/02/2022] [Accepted: 05/15/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Ann-Kathrin Gersmann
- Institute of Pathology, University Medical Center, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Florian Haller
- Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Nina Behnert
- Department of Pathology, Pathologie Nordhessen, Kassel, Germany
| | - Annika Richter
- Institute of Pathology, University Medical Center, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Robert Stöhr
- Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Arndt Hartmann
- Institute of Pathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Philipp Ströbel
- Institute of Pathology, University Medical Center, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Felix Bremmer
- Institute of Pathology, University Medical Center, Robert-Koch-Str. 40, 37075, Göttingen, Germany
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Drabent P, Fraitag S. Malignant Superficial Mesenchymal Tumors in Children. Cancers (Basel) 2022; 14:cancers14092160. [PMID: 35565289 PMCID: PMC9104419 DOI: 10.3390/cancers14092160] [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: 03/19/2022] [Revised: 04/12/2022] [Accepted: 04/22/2022] [Indexed: 11/16/2022] Open
Abstract
Malignant superficial mesenchymal tumors are a very diverse group of neoplasms with few clinical and radiological discriminatory factors. Hence, some of these cancers are rarely suspected based on clinical and radiological grounds, others may be easily misdiagnosed, and the histological analysis of a biopsy or resection is central in the diagnostic process. In children, the age at presentation is a major element of the differential diagnosis. Some tumors have a very distinct epidemiology, while others may be seen at any age. More recently, the advances in molecular biology have greatly improved the diagnosis of mesenchymal tumors and new entities are still being described. In the present review, we provide an overview of the diversity of malignant superficial mesenchymal tumors in children, including new and/or rare entities. We discuss the important diagnostic features, be they clinical, histological, or molecular. Special attention was given to the genetic features of these tumors, particularly when they were helpful for the diagnosis or treatment.
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Affiliation(s)
- Philippe Drabent
- Department of Pathology, Necker-Enfants Malades Hospital, APHP, 75015 Paris, France;
- Faculté de Médecine, Université de Paris, 75005 Paris, France
| | - Sylvie Fraitag
- Department of Pathology, Necker-Enfants Malades Hospital, APHP, 75015 Paris, France;
- Faculté de Médecine, Université de Paris, 75005 Paris, France
- Correspondence:
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11
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Torrence D, Antonescu CR. The genetics of vascular tumours: an update. Histopathology 2022; 80:19-32. [PMID: 34958509 PMCID: PMC8950088 DOI: 10.1111/his.14458] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 07/16/2021] [Accepted: 07/20/2021] [Indexed: 01/03/2023]
Abstract
Recent molecular advances have shed significant light on the classification of vascular tumours. Except for haemangiomas, vascular lesions remain difficult to diagnose, owing to their rarity and overlapping clinical, radiographic and histological features across malignancies. In particular, challenges still remain in the differential diagnosis of epithelioid vascular tumours, including epithelioid haemangioma and epithelioid haemangioendothelioma at the benign/low-grade end of the spectrum, and epithelioid angiosarcoma at the high-grade end. Historically, the classification of vascular tumours has been heavily dependent on the clinical setting and histological features, as traditional immunohistochemical markers across the group have often been non-discriminatory. The increased application of next-generation sequencing in clinical practice, in particular targeted RNA sequencing (such as Archer, Illumina), has led to numerous novel discoveries, mainly recurrent gene fusions (e.g. those involving FOS, FOSB, YAP1, and WWTR1), which have resulted in refined tumour classification and improved diagnostic reproducibility for vascular tumours. However, other molecular alterations besides fusions have been discovered in vascular tumours, including somatic mutations (e.g. involving GNA family and IDH genes) in a variety of haemangiomas, as well as copy number alterations in high-grade angiosarcomas (e.g. MYC amplifications). Moreover, the translation of these novel molecular abnormalities into diagnostic ancillary markers, either fluorescence in-situ hybridisation probes or surrogate immunohistochemical markers (FOSB, CAMTA1, YAP1, and MYC), has been remarkable. This review will focus on the latest molecular discoveries covering both benign and malignant vascular tumours, and will provide practical diagnostic algorithms, highlighting frequently encountered pitfalls and challenges in the diagnosis of vascular lesions.
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Affiliation(s)
- Dianne Torrence
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Cristina R Antonescu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY,Corresponding author: Cristina R Antonescu, MD, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065,
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