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Dos Santos ES, Rocha AFL, Leite AA, Gallagher KPD, Penafort PVM, Cintra ML, Vargas PA. A crateriform lesion on the upper lip. Oral Surg Oral Med Oral Pathol Oral Radiol 2024:S2212-4403(24)00084-1. [PMID: 38519297 DOI: 10.1016/j.oooo.2024.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 02/09/2024] [Accepted: 02/26/2024] [Indexed: 03/24/2024]
Affiliation(s)
- Erison Santana Dos Santos
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Audrey Foster Lefort Rocha
- Oral Medicine, Department of Diagnosis and Surgery, Araraquara Dental School, Universidade Estadual Paulista (UNESP), São Paulo, Brazil
| | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | | | | | - Maria Letícia Cintra
- Pathology Department, Dermatopathology Division, School of Medical Sciences, UNICAMP, Sao Paulo, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil.
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2
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Silva LC, Leite AA, Borgato GB, Wagner VP, Martins MD, Loureiro FJA, Lopes MA, Santos-Silva AR, Sperandio M, de Castro Junior G, Kowalski LP, Squarize CH, Castilho RM, Vargas PA. Oral squamous cell carcinoma cancer stem cells have different drug sensitive to pharmacological NFκB and histone deacetylation inhibition. Am J Cancer Res 2023; 13:6038-6050. [PMID: 38187064 PMCID: PMC10767341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/06/2023] [Indexed: 01/09/2024] Open
Abstract
Despite many progresses in the development of new systemic therapies for oral squamous cell carcinoma (OSCC), the five-year survival rate of OSCC is low. The traditional chemotherapies approach (cisplatin - CDDP) shows some limitations like drug toxicity, limited efficacy, and drug resistance. Promising studies suggested OSCC cancer stem cells (CSC) presented resistance to CDDP. We have previously studied many targets, and we extensively showed the efficacy of the NFκB signaling and the role of histones acetylation, on different malignant tumors, including adenoid cystic carcinoma and mucoepidermoid carcinoma, but until then the effects of the NFkB inhibitor and histone deacetylase (HDAC) inhibitor on the biology of OSCC were not evaluated. Here we assessed the pharmacological inhibitor of NFκB emetine and HDAC inhibitor SAHA on the behavior of CSC derived from OSCC. Our data suggested that CDDP administration resulted in reduced viability of bulk OSCC cells and increased CSC. A single and isolated shot of emetine and SAHA were able to disrupt CSC by inhibiting the NFκB pathway and increasing the histone acetylation levels, respectively. Further, the combined administration of emetine and SAHA presented the same CSC disruption as seen in emetine alone.
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Affiliation(s)
- Luan César Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | | | - Vivian Petersen Wagner
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, Department of Clinical Dentistry, University of SheffieldSheffield, SY, UK
| | - Manoela Domingues Martins
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do SulPorto Alegre, Brazil
| | | | - Márcio Ajudarte Lopes
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
| | - Marcelo Sperandio
- Department of Oral Pathology & Medicine, Sao Leopoldo Mandic Dental Institute and Research CenterCampinas, SP, Brazil
| | - Gilberto de Castro Junior
- Serviço de Oncologia Clínica, Instituto do Câncer do Estado de São Paulo, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São PauloSão Paulo, SP, Brazil
| | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery, University of Sao Paulo Medical School and Head and Neck Surgery and Otorhinolaryngology Department, AC Camargo Cancer CenterSão Paulo, SP, Brazil
| | - Cristiane H Squarize
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Rogerio Moraes Castilho
- Laboratory of Epithelial Biology, Department of Periodontics and Oral Medicine, University of Michigan School of DentistryAnn Arbor, MI, USA
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of CampinasPiracicaba, SP, Brazil
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3
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Pérez-de-Oliveira ME, Louredo BVR, do Amaral-Silva GK, Leite AA, de Almeida OP, Jorge J, Santos-Silva AR, Lopes MA, Vargas PA. Cell block preparation as an adjunctive tool after fine-needle aspiration cytology for screening oral and maxillofacial diseases. Oral Surg Oral Med Oral Pathol Oral Radiol 2023; 136:343-352. [PMID: 37516618 DOI: 10.1016/j.oooo.2023.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 04/25/2023] [Accepted: 05/10/2023] [Indexed: 07/31/2023]
Abstract
OBJECTIVE To describe the use of cell block (CB) preparation from fine-needle aspiration cytology for diagnosing oral and maxillofacial diseases. STUDY DESIGN We performed a retrospective analysis of 568 samples collected by our laboratory for CB preparation from fine-needle aspiration cytology of the oral and maxillofacial region between January 2001 and October 2021. We performed cytologic diagnoses and compared them with the available histopathologic diagnoses to calculate the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of CB preparation for identifying malignant lesions. RESULTS The most frequent diagnosis was pleomorphic adenoma (n = 44, 7.7%), followed by metastatic squamous-cell carcinoma (n = 28, 4.9%) and odontogenic keratocyst (n = 26, 4.6%). The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of CB preparation, which revealed detailed morphologic and architectural patterns, were 70.0%, 100.0%, 100.0%, 62.5%, and 80.0%, respectively. CONCLUSIONS Cell block preparation from fine-needle aspiration cytology of the oral and maxillofacial region may be a useful adjunctive diagnostic tool for diagnosing oral and maxillofacial diseases because it reveals morphologic and architectural patterns similar to those shown on histopathologic slides, leading to the better categorization of diseases.
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Affiliation(s)
| | | | - Gleyson Kleber do Amaral-Silva
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Oslei Paes de Almeida
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Jacks Jorge
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Alan Roger Santos-Silva
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Márcio Ajudarte Lopes
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
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4
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Mendes Penafort PV, Leite AA, Noronha-Júnior F, Vargas PA. Letter to Editor Regarding "Hybrid Neurofibroma/Schwannoma of the Oral Cavity: A Rare Case Report and Literature Review" by Leite et al. Int J Surg Pathol 2023; 31:1163-1165. [PMID: 36314442 DOI: 10.1177/10668969221129891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Fernando Noronha-Júnior
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
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5
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Silva LC, Faustino ISP, Ramos JC, Colafemina ACE, Di Pauli-Paglioni M, Leite AA, Santos-Silva AR, Lopes MA, Vargas PA. The importance of early treatment of oral squamous cell carcinoma: Case report. Oral Oncol 2023; 144:106442. [PMID: 37356209 DOI: 10.1016/j.oraloncology.2023.106442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/27/2023]
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) is frequently diagnosed at an advanced stage, with the five-year survival rate varying around 50%, however, ifs the sooner OSCC in early-stage is treated, the lower the chances of recurrence and death. In this study, we described an OSCC diagnosed early, highlighting how the early surgical excision prevents the morbidity. CASE REPORT A 74-year-old man presented a whitish and symptomatic plaque and a discreet ulcerated area on the right lateral border of the tongue. Due to close contact with the second inferior molar, a clinical diagnosis of a frictional keratosis was suspected, however as the lesion persisted after two weeks of follow-up, an incisional biopsy was performed and the microscopic features revealed an OSCC. Early surgical resection was performed, preventing the morbidity and improve benefits to patient. CONCLUSION OSCC can manifest of several clinical forms, including indolent appearances, which can delay the diagnosis, and consequently the prognosis. Further, it is important to recognize and not neglect any intraoral lesions, in order to avoid the far more invasive surgery that a more advance disease would imply.
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Affiliation(s)
- Luan César Silva
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Isabel Schausltz Pereira Faustino
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Joab Cabral Ramos
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Ana Carolina Evangelista Colafemina
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Mariana Di Pauli-Paglioni
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Amanda Almeida Leite
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Alan Roger Santos-Silva
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Márcio Ajudarte Lopes
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
| | - Pablo Agustin Vargas
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
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Leite AA, Mariz BALA, Oliveira LA, Assunção Júnior JNR, Almeida OPD, Vargas PA. Hybrid Neurofibroma/Schwannoma of the Oral Cavity: A Rare Case Report and Literature Review. Int J Surg Pathol 2023; 31:695-701. [PMID: 35971291 DOI: 10.1177/10668969221117978] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Hybrid peripheral nerve sheath tumors show combined features of more than one type of conventional benign peripheral nerve sheath tumors. There are few cases reported of hybrid peripheral nerve sheath tumors in the head and neck region. A 68-year-old female patient was referred for evaluation of an oral swelling lasting five years. Intraoral examination revealed a small mobile nodule located in the lower vestibule. The patient underwent excisional biopsy and microscopic evaluation showed typical features of neurofibroma enclosing areas with palisading nuclei compatible with Antoni A pattern, which are seen in schwannomas. These regions showed strong and diffuse immunoreactivity for S100 protein and moderate positivity in the neurofibroma area. CD34 was positive in the neurofibroma area and entrapped axons were positive for neurofilament. The final diagnosis was oral hybrid neurofibroma-schwannoma tumor. Hybrid peripheral nerve sheath tumors, although extremely rare, may arise within the oral cavity. To the best of our knowledge, this is the first neurofibroma-schwannoma tumor reported in the oral cavity. Recognizing hybrid peripheral nerve sheath tumors as a distinct clinicopathological entity is important because they may also be associated with syndromic disorders.
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Affiliation(s)
- Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Brazil
| | | | | | | | - Oslei Paes de Almeida
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Brazil
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Leite AA, Pires TDL, Silva LC, Penafort PVM, Vargas PA. Lobulated nodule arising on the tongue in a young patient. Oral Dis 2023; 29:1379-1381. [PMID: 37075058 DOI: 10.1111/odi.14389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 04/20/2023]
Affiliation(s)
- Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Tulio de Lucena Pires
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Luan César Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Paulo Victor Mendes Penafort
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
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8
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Leite AA, Da Silva LC, Borgato GB, Martins MD, De Castilho RM, Vargas PA. ANTI-CANCER PROPERTIES OF CEPHAELINE IN ORAL SQUAMOUS CELL CARCINOMA CELL LINE. Oral Surg Oral Med Oral Pathol Oral Radiol 2022. [DOI: 10.1016/j.oooo.2022.01.700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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De Carvalho TMI, Viera PVA, Vargas PA, Leite AA, De Lima Camilo A, Besseler MO, Rocha AC. EXTENSIVE MAXILLARY ODONTOGENIC CALCIFYING CYST: CASE REPORT. Oral Surg Oral Med Oral Pathol Oral Radiol 2022. [DOI: 10.1016/j.oooo.2022.01.308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Oliveira LA, Leite AA, Mariz BALA, Teixeira VP, Rosa Assunção JN. POLYMORPHOUS LOW-GRADE ADENOCARCINOMA: CASE REPORT. Oral Surg Oral Med Oral Pathol Oral Radiol 2022. [DOI: 10.1016/j.oooo.2022.01.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Souza LL, Roza ALOC, Leite AA, Gallagher KPD, Mariz BALA, Santos MRG, Santos-Silva AR, Vargas PA. A PIGMENTED NODULE IN THE BUCCAL MUCOSA. Oral Surg Oral Med Oral Pathol Oral Radiol 2022; 135:465-469. [PMID: 36153301 DOI: 10.1016/j.oooo.2022.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/11/2022] [Accepted: 08/15/2022] [Indexed: 11/28/2022]
Affiliation(s)
- L L Souza
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | | | - Mariana Rates Gonzaga Santos
- Department of Immunology, Science Biological Institute, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil; Department of Oral Pathology and Oral Biology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa.
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Lavareze L, Scarini JF, de Lima-Souza RA, Egal ESA, Tetzner D, Leite AA, Vargas PA, Altemani A, Mariano FV. Granulomatous gingival enlargement in a patient with an unrecognized HIV infection. J Am Dent Assoc 2022:S0002-8177(22)00336-1. [PMID: 35870949 DOI: 10.1016/j.adaj.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 05/30/2022] [Accepted: 06/06/2022] [Indexed: 10/17/2022]
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13
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Cabral Ramos J, César Silva L, Schausltz Pereira Faustino I, Carolina Evangelista Colafemina A, de Pauli Paglioni M, Almeida Leite A, Roger Santos-Silva A, Agustin Vargas P, Ajudarte Lopes M. A rare case of squamous cell carcinoma of the gingiva: A diagnostic challenge. Oral Oncol 2022; 132:105995. [PMID: 35759858 DOI: 10.1016/j.oraloncology.2022.105995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/15/2022] [Accepted: 06/21/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) of the gingiva represents less than 6% of intraoral carcinomas. CASE REPORT A 51-year-old male patient presented with a history of a symptomatic red spot with periods of remission and recurrence in the mandibular gingiva. On clinical examination red and white areas were observed in the gingiva, particularly around the left lower molars. Diagnosis of gingival lichen planus was suspected and topical corticosteroids was prescribed. A good clinical response was observed with reduction of symptom. The patient remained in regular follow-up and after 9 months, the lesion suddenly changed, became ulcerated and diagnosis of OSCC was established. CONCLUSION The clinical manifestation of OSCC can eventually mimic other even more common lesions of the oral mucosa, highlighting the importance of considering OSCC as differential diagnosis of any unexplained and persistent lesion in the oral cavity.
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Affiliation(s)
- Joab Cabral Ramos
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Luan César Silva
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Isabel Schausltz Pereira Faustino
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Ana Carolina Evangelista Colafemina
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Mariana de Pauli Paglioni
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Amanda Almeida Leite
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Alan Roger Santos-Silva
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Pablo Agustin Vargas
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Marcio Ajudarte Lopes
- Oral Semiology and Oral Pathology, Department of Oral Diagnosis, Piracicaba School of Dentistry, University of Campinas, Piracicaba, São Paulo, Brazil.
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14
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Chateaubriand SL, de Amorim Carvalho EJ, Leite AA, da Silva Leonel ACL, Prado JD, da Cruz Perez DE. Necrotizing sialometaplasia: A diagnostic challenge. Oral Oncol 2021; 118:105349. [PMID: 34023218 DOI: 10.1016/j.oraloncology.2021.105349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Saulo Lobo Chateaubriand
- Department of Clinical and Preventive Dentistry, Universidade Federal de Pernambuco (UFPE), Recife, Pernambuco, Brazil
| | | | - Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil
| | | | - José Divaldo Prado
- Department of Stomatology, A. C. Camargo Cancer Center, São Paulo, São Paulo, Brazil
| | - Danyel Elias da Cruz Perez
- Department of Clinical and Preventive Dentistry, Universidade Federal de Pernambuco (UFPE), Recife, Pernambuco, Brazil; Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
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15
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do Amaral-Silva GK, Leite AA, Mariz BALA, dos Santos Moreira F, Lopes MA, Ribeiro ACP, Santos-Silva AR, Rocha AC, Vargas PA. Metastatic Neuroblastoma to the Mandible of Children: Report of Two Cases and Critical Review of the Literature. Head Neck Pathol 2021; 15:757-768. [PMID: 33394374 PMCID: PMC8384948 DOI: 10.1007/s12105-020-01277-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 12/14/2020] [Indexed: 10/22/2022]
Abstract
Neuroblastoma is the most common extracranial solid cancer of infancy, occurring mainly in the adrenal gland, with high metastatic potential. However, involvement of the head and neck region is rare. Here, we present two cases of metastatic neuroblastoma of childhood, in which a mandibular swelling was the first sign of disseminated disease. Case 1 describes a 4-year-old boy with a 2-week history of painful swelling in the left mandibular region, body soreness and weakness. Panoramic radiography and computed tomography showed a destructive lesion in the left mandibular ramus. Case 2 describes a 3-year-old boy with a 1-month history of swelling in the right mandibular area. Panoramic radiograph and cone-beam computed tomography showed a destructive lesion in the right body and ramus of the mandible, displacing tooth germs, with the destruction of vestibular and lingual bone cortices. In both cases, microscopic analyses revealed a diffuse proliferation of small, round, and blue cells with hyperchromatic nuclei and scant cytoplasm. While Case 1 was more undifferentiated, Case 2 presented eosinophilic areas suggestive of neuropil. A large immunohistochemical panel was performed, showing expression of neural markers such as CD56, neuron-specific enolase (in Case 2), chromogranin, and synaptophysin. Both lesions presented a high proliferation index (Ki67 > 70% and 80%, respectively). Positron emission tomography-computed tomography revealed ipsilateral adrenal primary lesions in both cases, with multiple bone metastatic lesions. Besides the mandible, multiple sites of the axial and appendicular skeleton were affected. Treatment consisted of induction chemotherapy, adrenalectomy, consolidation chemoradiotherapy, and post-consolidation therapy.
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Affiliation(s)
- Gleyson Kleber do Amaral-Silva
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - Amanda Almeida Leite
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - Bruno Augusto Linhares Almeida Mariz
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - Fernanda dos Santos Moreira
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - Márcio Ajudarte Lopes
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - Ana Carolina Prado Ribeiro
- grid.488702.10000 0004 0445 1036Dental Oncology Service, Instituto do Câncer do Estado de São Paulo, ICESP-FMUSP, São Paulo, Brazil
| | - Alan Roger Santos-Silva
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
| | - André Caroli Rocha
- grid.11899.380000 0004 1937 0722Medical School, Clinics Hospital, University of São Paulo, São Paulo, Brazil
| | - Pablo Agustin Vargas
- grid.411087.b0000 0001 0723 2494Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, CEP: 13414-903 Brazil
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Ribeiro JT, Thieme S, Zettermann P, Leite AA, Zanella VG, Pilar EFS, Fonseca FP, Mesquita RA, Vargas PA, Dos Santos JN, Martins MD. Immunoexpression of BDNF, TrkB, and p75NTR receptors in peripheral neural lesions of the head and neck. J Oral Pathol Med 2020; 50:492-501. [PMID: 33222311 DOI: 10.1111/jop.13145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 10/20/2020] [Accepted: 11/11/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND Brain-derived neurotrophic factor (BDNF) and neurotrophin receptors have been recognized as fundamental regulators of normal brain development, homeostasis, and plasticity. They have also been studied in the behavior of central nervous system tumors. Here, we studied the pattern of BDNF, TrkB and p75NTR immunoexpression in peripheral benign and malignant neural lesions in head and neck. METHODS This cross-sectional analytical study included 79 cases of head and neck neural lesions. Nineteen cases of traumatic neuromas (TN), 20 cases of granular cell tumors (GCT), 16 cases of neurofibromas (NF), 20 cases of schwannomas (SC), and 4 malignant peripheral nerve sheath tumor (MPNST) were submitted to immunohistochemistry with BDNF, TrkB, and p75NTR antibodies. A semi-quantitative analysis was performed. RESULTS The analysis of BDNF demonstrated a high percentage of positive cells in TN, GCT and SC with a decrease in cases of NF and MPNST. TrkB presented a lower significant immunoexpression in GCT in relation to the TN, NF, SC, and MPNST (P < .0001); and TN showed less percentage of positive cell compared to SC (P = .0017). Regarding p75NTR, the percentage of positive cell was significantly reduced in MPNST compared GCT (P = .009), NF (P = .0138) and SC (P = .0069). Also, a decrease in TN compared to GCT (P = .007) was observed. CONCLUSIONS Our results showed the immunoreactivity of BDNF, TrkB, and p75NTR in head and neck peripheral neural lesions. Reduction of BDNF and p75NTR in MPNST might suggest down-regulation during the acquisition of malignant phenotype.
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Affiliation(s)
- Julia Turra Ribeiro
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Stéfanie Thieme
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Paula Zettermann
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Virgilio Gonzales Zanella
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Head and Neck Surgery Department, Hospital Santa Rita, Complexo Hospitalar Santa Casa, Porto Alegre, Brazil
| | - Emily Ferreira Salles Pilar
- Experimental Pathology Unit, Clinics Hospital of Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Felipe Paiva Fonseca
- Department of Oral Surgery and Pathology, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Ricardo Alves Mesquita
- Department of Oral Surgery and Pathology, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Jean Nunes Dos Santos
- Department of Oral Pathology, School of Dentistry, Federal University of Bahia, Salvador, Brazil
| | - Manoela Domingues Martins
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Head and Neck Surgery Department, Hospital Santa Rita, Complexo Hospitalar Santa Casa, Porto Alegre, Brazil.,Department of Oral Medicine, Porto Alegre Clinics Hospital (HCPA/UFRGS), Porto Alegre, Brazil
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Miranda-Galvis M, Rumayor Piña A, Sales de Sá R, Almeida Leite A, Agustin Vargas P, Calsavara VF, Lópes Pinto CA, Teng Y, Kowalski LP. PD-L1 expression patterns in oral cancer as an integrated approach for further prognostic classification. Oral Dis 2020; 27:1699-1710. [PMID: 33169454 DOI: 10.1111/odi.13714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/21/2020] [Accepted: 10/24/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Despite the well-known role of programmed cell death ligand 1 (PD-L1) in promoting immune resistance in oral squamous cell carcinoma (OSCC), its potential utility as a prognostic biomarker is undetermined. We evaluated PD-L1 expression as predictor of survival in patients with OSCC and explored PD-L1 expression patterns. METHODS We conducted a retrospective cohort study that assessed PD-L1 expression through immunohistochemistry in 123 surgical specimens of OSCC. A first approach evaluated tumor proportion scores (TPS) and combined proportion scores (CPS). Next, expression patterns were examined by evaluating PD-L1 localization in tumor nests, as well as the interfaces of tumor cells (TC) and immune cells (IC) in the tumor microenvironment. RESULTS High-level PD-L1 expression determined by TPS and CPS using variable cutoffs was not associated with survival. Immunohistochemistry revealed that TC expressed PD-L1 in either patchy or diffuse patterns. The patchy pattern was an independent risk factor for overall survival. Furthermore, expression patterns in the tumor immune microenvironment showed that most cases expressed PD-L1 on both TC and IC, while PD-L1 non-expressors had the lowest overall survival. CONCLUSION PD-L1 expression patterns in the context of localization in tumor nests and TC-IC interactions represent antitumor immune responses better than either TPS or CPS. Our suggested classification system may have important implications for the characterization of OSCC and for the use of PD-L1 as a prognostic biomarker.
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Affiliation(s)
- Marisol Miranda-Galvis
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil.,Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | | | - Raísa Sales de Sá
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | | | | | - Yong Teng
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, USA.,Georgia Cancer Center, Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Luiz Paulo Kowalski
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil.,Department of Head and Neck Surgery and Otorhinolaryngology, A.C. Camargo Cancer Center, São Paulo, Brazil.,Head and Neck Surgery Department, Medical School, University of São Paulo, São Paulo, Brazil
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18
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Silva Cunha JL, Leite AA, de Castro Abrantes T, Vervloet LP, de Lima Morais TM, de Oliveira Paiva Neto G, Kimura TNL, Ferreira SMS, de Albuquerque-Júnior RLC, Abrahão AC, Romañach MJ, Benevenuto de Andrade BA, de Almeida OP, Soares CD. Oral focal mucinosis: A multi-institutional study and literature review. J Cutan Pathol 2020; 48:24-33. [PMID: 33410541 DOI: 10.1111/cup.13813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 07/05/2020] [Accepted: 07/15/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND Oral focal mucinosis (OFM) is a rare benign condition of unknown etiology, considered the oral counterpart of cutaneous focal mucinosis. We report the clinicopathologic features of 21 cases of OFM in conjunction with a review of the literature. METHODS Clinical data were collected from the records of five oral and maxillofacial pathology services. All cases were evaluated by hematoxylin and eosin staining, histochemistry, and immunohistochemistry (vimentin, S-100, α-SMA, CD34, and mast cell). RESULTS The series comprised 14 females (66.7%) and seven males (33.3%), with a mean age of 48.2 ± 20.7 years (range: 8-77 years) and a 2:1 female-to-male ratio. Most of the lesions affected the gingiva (n = 6, 28.6%) and presented clinically as asymptomatic sessile or pedunculated nodules with fibrous or hyperplasic appearance. All cases were negative for S-100 protein, CD34, and α-SMA and positive for Alcian blue staining. Conservative surgical excision was the treatment in all cases, and there was only one recurrence. CONCLUSION OFM is a rare benign disorder that is often clinically misdiagnosed as reactive lesions or benign proliferative processes. Dermatologists and pathologists should consider OFM in the differential diagnosis of soft tissue lesions in the oral cavity, mainly located in the gingiva.
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Affiliation(s)
- John Lennon Silva Cunha
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Amanda Almeida Leite
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Thamiris de Castro Abrantes
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Lorena Passoni Vervloet
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Thayná Melo de Lima Morais
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | | | | | | | | | - Aline Corrêa Abrahão
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Mario José Romañach
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | | | - Oslei Paes de Almeida
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Ciro Dantas Soares
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
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Roza ALOC, Sousa EM, Leite AA, Amaral-Silva GK, Morais TMDL, Wagner VP, Schuch LF, Vasconcelos ACU, de Arruda JAA, Mesquita RA, Fonseca FP, Abrahão AC, Agostini M, de Andrade BAB, da Silveira EJD, Martínez-Flores R, Rondanelli BM, Alberdi-Navarro J, Robinson L, Marin C, Assunção Júnior JNR, Valiati R, Fregnani ER, Santos-Silva AR, Lopes MA, Hunter KD, Khurram SA, Speight PM, Mosqueda-Taylor A, van Heerden WFP, Carlos R, Wright JM, de Almeida OP, Romañach MJ, Vargas PA. Central odontogenic fibroma: an international multicentric study of 62 cases. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 131:549-557. [PMID: 32988809 DOI: 10.1016/j.oooo.2020.08.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/30/2020] [Accepted: 08/16/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVE The aim of this study was to report the clinicopathologic features of 62 cases of central odontogenic fibroma (COdF). STUDY DESIGN Clinical and radiographic data were collected from the records of 13 oral pathology laboratories. All cases were microscopically reviewed, considering the current World Health Organization classification of tumors and were classified according to histopathologic features. RESULTS There were 43 females and 19 males (average age 33.9 years; range 8-63 years). Clinically, COdF lesions appeared as asymptomatic swellings, occurring similarly in the maxilla (n = 33) and the mandible (n = 29); 9 cases exhibited palatal depression. Imaging revealed well-defined, interradicular unilocular (n = 27), and multilocular (n = 12) radiolucencies, with displacement of contiguous teeth (55%) and root resorption (46.4%). Microscopically, classic features of epithelial-rich (n = 33), amyloid (n = 10), associated giant cell lesion (n = 7), ossifying (n = 6), epithelial-poor (n = 3), and granular cell (n = 3) variants were seen. Langerhans cells were highlighted by CD1a staining in 17 cases. Most patients underwent conservative surgical treatments, with 1 patient experiencing recurrence. CONCLUSIONS To the best of our knowledge, this study represents the largest clinicopathologic study of COdF. Most cases appeared as locally aggressive lesions located in tooth-bearing areas in middle-aged women. Inactive-appearing odontogenic epithelium is usually observed within a fibrous/fibromyxoid stroma, occasionally exhibiting amyloid deposits, multinucleated giant cells, or granular cells.
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Affiliation(s)
| | - Emanuel Mendes Sousa
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Amanda Almeida Leite
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | | | - Thayná Melo de Lima Morais
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Vivian Petersen Wagner
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Lauren Frenzel Schuch
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | | | | | - Ricardo Alves Mesquita
- Department of Oral Surgery and Pathology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Felipe Paiva Fonseca
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil; Department of Oral Surgery and Pathology, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil; Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Aline Corrêa Abrahão
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Michelle Agostini
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | | | - Ericka Janine Dantas da Silveira
- Post-Graduate Program in Dentistry Sciences, Dentistry Department, Federal University of Rio Grande do Norte (UFRN), Natal, Brazil
| | - René Martínez-Flores
- Department of Oral Pathology and Oral Medicine, Dentistry Faculty, Andrés Bello University, Viña del Mar, Chile
| | | | - Javier Alberdi-Navarro
- Oral Medicine and Oral and Maxillofacial Pathology Unit, Dental Clinic Service, Department of Stomatology II, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Liam Robinson
- Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Constanza Marin
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | | | - Renato Valiati
- School of Dentistry, Planalto Catarinense University (UNIPLAC), Lages, Brazil
| | | | - Alan Roger Santos-Silva
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Marcio Ajudarte Lopes
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Keith D Hunter
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK; Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Syed Ali Khurram
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | - Paul M Speight
- Academic Unit of Oral and Maxillofacial Medicine and Pathology, School of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | - Adalberto Mosqueda-Taylor
- Departamento de Atención a la Salud, Universidad Autónoma Metropolitana Xochimilco, Mexico City, Mexico
| | - Willie F P van Heerden
- Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Román Carlos
- Pathology Section, Centro Clínico de Cabeza y Cuello/Hospital Herrera Llerandi, Guatemala City, Guatemala
| | - John M Wright
- Department of Diagnostic Sciences, Texas A&M University College of Dentistry, College Station, TX, USA
| | - Oslei Paes de Almeida
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Mário José Romañach
- Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), São Paulo, Brazil; Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa.
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Pérez-de-Oliveira ME, Petersen Wagner V, do Amaral-Silva GK, Almeida Leite A, Ajudarte Lopes M, Santos-Silva AR, Jorge Júnior J, de Almeida OP, Agustin Vargas P. An audit of cytopathology in the oral and maxillofacial region: 18 years of experience. Cytopathology 2020; 31:555-563. [PMID: 32681691 DOI: 10.1111/cyt.12891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 07/08/2020] [Accepted: 07/12/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The aim of this study was to perform an audit of oral and maxillofacial specimens submitted for cytological diagnosis to verify the importance of this complementary examination. METHODS A retrospective analysis of our institutional cytopathology database was performed over an 18-year period. Clinical information and cytological data were collected. Associations between independent variables and outcomes were assessed using the Pearson χ2 test or Fisher's test, with a 5% significance level. When available, the histological diagnosis was compared with cytological diagnosis to identify the percentage of agreement and the specificity, sensitivity and accuracy of cytology in identifying malignant neoplasms. RESULTS A total of 1082 cases were identified, which included 65 different cytological diagnoses. Exfoliative cytology (EC) was performed in 312 cases (29.1%) and fine needle aspiration cytology (FNAC) in 770 cases (70.9%). EC was mainly employed to diagnose oral infectious diseases (P < 0.001) and FNAC to diagnose neoplasms, cystic, reactive and miscellaneous lesions (P < 0.001). Cell-block was performed in 555 FNAC cases (51.3%). Panoptic, Papanicolaou and haematoxylin-eosin staining were performed in FNAC and periodic acid-Schiff in EC (P < 0.001). In 211 cases (19.5%), the histological diagnosis was available and the percentage agreement with the cytological diagnosis was 41.2%. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy to identify malignant neoplasms were 84.6%, 100%, 100%, 77.8% and 90.0%, respectively. CONCLUSIONS EC was mainly performed for diagnosis of infectious diseases and FNAC for diagnosis of salivary gland tumours, odontogenic lesions, reactive lesions and cervical metastasis.
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Affiliation(s)
- Maria Eduarda Pérez-de-Oliveira
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Vivian Petersen Wagner
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Gleyson Kleber do Amaral-Silva
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Amanda Almeida Leite
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Márcio Ajudarte Lopes
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Jacks Jorge Júnior
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Oslei Paes de Almeida
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Oral Pathology and Semiology Area, Piracicaba Dental School, State University of Campinas (UNICAMP), Piracicaba, Brazil
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Leite AA, Vargas PA, Dos Santos Silva AR, Galvis MM, de Sá RS, Lopes Pinto CA, Kowalski LP, Saieg M. Retrospective application of the Milan System for reporting salivary gland cytopathology: A Cancer Center experience. Diagn Cytopathol 2020; 48:821-826. [PMID: 32374949 DOI: 10.1002/dc.24464] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/31/2020] [Accepted: 04/24/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND The Milan System for Reporting Salivary Gland Cytopathology (MSRSGC) was recently proposed. Herein, we retrospectively applied this nomenclature system to salivary gland lesions sampled by ultrasound-guided fine-needle aspiration (FNA). METHODS All cases of salivary gland FNA with available surgical follow-up, in the period from 2014 to 2017 at our institution were reviewed and reclassified according to one of the six categories of the MSRSGC, blind to the surgical outcome. Overall sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated, as well as risks of neoplasm (RON) and risk of malignancy (ROM) for each of the proposed categories. RESULTS There were 104 salivary gland lesions, with a female predominance (57.7%), most cases from the parotid gland (89.4%). Mean age was 53.2 years. Distribution of the specimens according to the Milan System was as follows: 19.2% nondiagnostic (ND), 8.7% non-neoplastic (NN), 9.6% atypia of undetermined significance (AUS), 40.4% benign neoplasm (BN), 14.4% salivary gland neoplasm of uncertain malignant potential (SUMP), 1.9% suspicious for malignancy (SFM), and 5.8% malignant. Sensitivity, specificity, PPV, and NPV using MSRSGC were calculated as 75%, 98.4%, 88.9%, and 95.3%, respectively. RON/ROM for each category were 60%/15% for ND, 44.4%/0% for NN, 90%/40% for AUS, 100%/9.5% for BN, 100%/13.3% for SUMP, 50%/50% for SFM and 100%/100% for malignant. CONCLUSION The use of the Milan System proved to be a useful method to predict the risk of neoplasm and malignancy in the sample studied, with high sensitivity and specificity.
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Affiliation(s)
- Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | - Marisol Miranda Galvis
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Raisa Sales de Sá
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery and Otorhinolaryngology, A.C. Camargo Cancer Center, São Paulo, Brazil
| | - Mauro Saieg
- Department of Pathology, Santa Casa Medical School, São Paulo, Brazil
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Sales de Sá R, Miranda Galvis M, Mariz BALA, Leite AA, Schultz L, Almeida OP, Santos-Silva AR, Pinto CAL, Vargas PA, Gollob KJ, Kowalski LP. Increased Tumor Immune Microenvironment CD3+ and CD20+ Lymphocytes Predict a Better Prognosis in Oral Tongue Squamous Cell Carcinoma. Front Cell Dev Biol 2020; 8:622161. [PMID: 33718347 PMCID: PMC7951138 DOI: 10.3389/fcell.2020.622161] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/18/2020] [Indexed: 12/24/2022] Open
Abstract
Background: Oral tongue squamous cell carcinoma (OTSCC) causes over 350,000 cases annually and particularly impacts populations in developing countries. Smoking and alcohol consumption are major risk factors. Determining the role of the tumor immune microenvironment (TIME) in OTSCC outcomes can elucidate immune mechanisms behind disease progression, and can potentially identify prognostic biomarkers. Methods: We performed a retrospective study of 48 OTSCC surgical specimens from patients with tobacco and alcohol exposures. A panel of immunoregulatory cell subpopulations including T (CD3, CD4, CD8) and B (CD20) lymphocytes, dendritic cells (CD1a, CD83), macrophages (CD68), and immune checkpoint molecules programmed cell death protein 1 (PD-1) and ligand 1 (PD-L1) were analyzed using immunohistochemistry. The levels of immune effector cell subpopulations and markers were analyzed in relation to overall survival. Results: Pathological characteristics of the tumor microenvironment included inflammatory infiltrates (83.3%), desmoplasia (41.6%), and perineural invasion (50.0%). The TIME contained high levels of T cells (CD3+, CD4+, and CD8+) and B cells (CD20+), as well as immature (CD1a) and mature (CD83) dendritic cells, PD-1, and PD-L1. Higher numbers of TIME infiltrating CD3+ T cells and CD20+ B cells were predictive of better survival, while higher levels of CD83+ mature dendritic cells predicted better survival. CD3+ T cells were identified as an independent prognostic marker for OTSCC. Lastly, CD3+ T cells were strongly correlated with the number of CD8+ cells and PD-L1 expression. Conclusion: Our findings provide evidence that the TIME profile of OTSSC impacted prognosis. The high expression of CD3+ T cells and B cells are predictive of better overall survival and indicative of an immunologically active, inflammatory TIME in patients with better survival. The number of CD3+ T cells was an independent prognostic marker.
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Affiliation(s)
- Raísa Sales de Sá
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Marisol Miranda Galvis
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, United States
| | | | - Amanda Almeida Leite
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Luciana Schultz
- Department of Anatomic Pathology, Instituto de Anatomia Patologica–IAP, Santa Barbara d'Oeste, Brazil
| | - Oslei Paes Almeida
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Alan Roger Santos-Silva
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | | | - Pablo Agustin Vargas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Kenneth John Gollob
- International Research Center, A. C. Camargo Cancer Center, São Paulo, Brazil
- National Institute for Science and Technology in Oncogenomics and Therapeutic Innovation, A.C. Camargo Cancer Center, São Paulo, Brazil
| | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery and Otorhinolaryngology, A. C. Camargo Cancer Center, São Paulo, Brazil
- Head and Neck Surgery Department, Medical School, University of São Paulo, São Paulo, Brazil
- *Correspondence: Luiz Paulo Kowalski
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Pérez-De-Oliveira ME, Leite AA, de Lima Morais TM, Lopes MA, de Almeida OP, Vargas PA. Intraoral Pleomorphic Adenoma With Extensive Bone Formation. Int J Surg Pathol 2019; 28:410-411. [PMID: 31496337 DOI: 10.1177/1066896919872816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | - Amanda Almeida Leite
- Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil
| | | | - Marcio Ajudarte Lopes
- Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil
| | | | - Pablo Agustin Vargas
- Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, São Paulo, Brazil
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Do Amaral-Silva GK, Leite AA, Santos-Silva AR, Fonseca FP, Rocha AC, Almeida OPD, Vargas PA. Tyrosine-Rich Crystalloids in Pleomorphic Adenoma: a Rare Descriptive Case. Oral Surg Oral Med Oral Pathol Oral Radiol 2018. [DOI: 10.1016/j.oooo.2018.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Leite AA, Da Silva Leonel ACL, Do Amaral Silva GK, Da Rocha Rodrigues I, De Castro JFL, Kowalski LP, Da Cruz Perez DE. Oral Squamous Cell Carcinoma: A Clinicopathological Study of 194 Cases in Northeastern Brazil. Oral Surg Oral Med Oral Pathol Oral Radiol 2018. [DOI: 10.1016/j.oooo.2018.02.678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Leite AA, Soares CD, De Almeida OP, Ribeiro Paranaiba LM, Rocha BA, De Melo Filho MR, De Carvalho MGF. Metastatic Gastric Adenocarcinoma of the Oral Cavity Mimicking Pyogenic Granuloma. Oral Surg Oral Med Oral Pathol Oral Radiol 2018. [DOI: 10.1016/j.oooo.2018.02.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Leite AA, Leonel ACLDS, de Castro JFL, Carvalho EJDA, Vargas PA, Kowalski LP, Perez DEDC. Oral squamous cell carcinoma: a clinicopathological study on 194 cases in northeastern Brazil. A cross-sectional retrospective study. SAO PAULO MED J 2018; 136:165-169. [PMID: 29590233 PMCID: PMC9879546 DOI: 10.1590/1516-3180.2017.0293061217] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 12/06/2017] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Only a few studies have evaluated the clinicopathological features of oral squamous cell carcinoma (SCC) in Brazil, and most were conducted in the most industrialized region of the country, i.e. the southeastern region. The aim of this study was to evaluate the clinicopathological features of this malignant neoplasm in northeastern Brazil. DESIGN AND SETTING Retrospective study performed in an oral pathology laboratory in Recife, Brazil. METHODS All cases of oral SCC that occurred between 2000 and 2015 were studied. Clinical data were recorded and histological slides were reviewed. Statistical analysis was performed using the chi-square test (P ≤ 0.05). RESULTS A total of 194 cases were evaluated. The male-to-female ratio was 1.5:1. The mean age was 65.4 years, and only 6.6% of the cases occurred in patients younger than 41 years. Most tumors consisted of well-differentiated SCC (54.6%). CONCLUSIONS The findings of this study highlight the higher prevalence of oral SCC among women and the increasing number of cases among young patients. Thus there is no specific risk group for oral SCC, as in the past. This fact needs to be taken into consideration in clinical routine care, so that apparently innocuous malignant lesions do not go unnoticed in these individuals.
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Affiliation(s)
- Amanda Almeida Leite
- MSc. Student, Oral Pathology Unit, Piracicaba Dental School, Universidade Estadual de Campinas (UNICAMP), Piracicaba (SP), Brazil.
| | | | - Jurema Freire Lisboa de Castro
- PhD. Professor, Oral Pathology Unit, School of Dentistry, Universidade Federal de Pernambuco (UFPE), Recife (PE), Brazil.
| | | | - Pablo Agustin Vargas
- PhD. Professor, Oral Pathology Unit, Piracicaba Dental School, Universidade Estadual de Campinas (UNICAMP), Piracicaba (SP), Brazil.
| | - Luiz Paulo Kowalski
- PhD. Director, Department of Otorhinolaryngology and Head and Neck Surgery, A.C. Camargo Cancer Center, Sao Paulo (SP), Brazil.
| | - Danyel Elias da Cruz Perez
- PhD. Professor, Oral Pathology Unit, School of Dentistry, Universidade Federal de Pernambuco (UFPE), Recife (PE), Brazil.
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Leite AA, de Oliveira MEP, Fernandes CIR, da Cruz Perez DE. Multiple pericoronal radiolucencies affecting the four dental quadrants: dentigerous cysts? J Korean Assoc Oral Maxillofac Surg 2016; 42:238-9. [PMID: 27598331 PMCID: PMC5009201 DOI: 10.5125/jkaoms.2016.42.4.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Amanda Almeida Leite
- Department of Clinical and Preventive Dentistry, Oral Pathology Section, Universidade Federal de Pernambuco, Recife, Brazil
| | | | | | - Danyel Elias da Cruz Perez
- Department of Clinical and Preventive Dentistry, Oral Pathology Section, Universidade Federal de Pernambuco, Recife, Brazil
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Ondei LS, Silveira LM, Leite AA, Souza DRS, Pinhel MAS, Percário S, Ricci Júnior O, Bonini-Domingos CR. Lipid peroxidation and antioxidant capacity of G6PD-deficient patients with A-(202G>A) mutation. Genet Mol Res 2009; 8:1345-51. [PMID: 19937590 DOI: 10.4238/vol8-4gmr662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an enzymopathy in which reduced NADPH concentrations are not maintained, resulting in oxidative damage. We evaluated G6PD activity, oxidative stress levels and Trolox equivalent antioxidant capacity in individuals with the A-(202G>A) mutation for G6PD deficiency. Five hundred and forty-four peripheral blood samples were screened for G6PD deficiency; we also analyzed lipid peroxidation products measured as thiobarbituric acid reactive species and Trolox equivalent antioxidant capacity. Men with the A-(202G>A) mutation had lower G6PD activity than women with the same mutation. Individuals with the A-(202G>A) mutation also differed in mean Trolox equivalent antioxidant capacity values but not for thiobarbituric acid reactive species values. We concluded that A-(202G>A) mutation is associated with reduced G6PD activity and increased Trolox equivalent antioxidant capacity.
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Affiliation(s)
- L S Ondei
- Departamento de Biologia, Laboratório de Hemoglobinas e Genética das Doenças Hematológicas, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, SP, Brasil.
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Vago AR, Andrade LO, Leite AA, d'Avila Reis D, Macedo AM, Adad SJ, Tostes S, Moreira MC, Filho GB, Pena SD. Genetic characterization of Trypanosoma cruzi directly from tissues of patients with chronic Chagas disease: differential distribution of genetic types into diverse organs. Am J Pathol 2000; 156:1805-9. [PMID: 10793092 PMCID: PMC1876933 DOI: 10.1016/s0002-9440(10)65052-3] [Citation(s) in RCA: 184] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have previously shown that a low-stringency single-specific primer-polymerase chain reaction (LSSP- PCR) is a highly sensitive and reproducible technique for the genetic profiling of Trypanosoma cruzi parasites directly in tissues from infected animals and humans. By applying LSSP-PCR to the study of the variable region of kinetoplast minicircle from T. cruzi, the intraspecific polymorphism of the kinetoplast-deoxyribonucleic acid (kDNA) sequence can be translated into individual kDNA signatures. In the present article, we report on our success using the LSSP-PCR technique in profiling the T. cruzi parasites present in the hearts of 13 patients with chagasic cardiopathy and in the esophagi of four patients (three of them with chagasic megaesophagus). In two patients, one with the cardiodigestive clinical form of Chagas disease and the other with cardiopathy and an esophageal inflammatory process, we could study both heart and esophagus and we detected distinct kDNA signatures in the two organs. This provides evidence of a differential tissue distribution of genetically diverse T. cruzi populations in chronic Chagas disease, suggesting that the genetic variability of the parasite is one of the determining factors of the clinical form of the disease.
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Affiliation(s)
- A R Vago
- Departamento de Morfologia, Instituto de Ciências Biológicas, Belo Horizonte, UFMG, Minas Gerais, Brazil
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Leite AA, Barretto OC. Erythrocyte glucose-6-phosphate dehydrogenase activity assay and affinity for its substrate under "physiological" conditions. Braz J Med Biol Res 1998; 31:1533-5. [PMID: 9951548 DOI: 10.1590/s0100-879x1998001200004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) activity and the affinity for its substrate glucose-6-phosphate were investigated under conditions similar to the physiological environment in terms of ionic strength (I: 0.188), cation concentration, pH 7.34, and temperature (37 degrees C). A 12.4, 10.4 and 21.4% decrease was observed in G6PD B, G6PD A+ and G6PD A- activities, respectively. A Km increase of 95.1, 94.4 and 95.4% was observed in G6PD B, G6PD A+ and G6PD A-, respectively, leading to a marked decrease in affinity. In conclusion, the observation of the reduced activity and affinity for its natural substrate reflects the actual pentose pathway rate. It also suggests a much lower NADPH generation, which is crucial mostly in G6PD-deficient individuals, whose NADPH availability is poor.
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Affiliation(s)
- A A Leite
- Faculdade de Ciências Farmacêuticas, Universidade Estadual de Araraquara, SP, Brasil
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Peixoto EC, de Barros Filho CM, Pontes AC, Leite AA, de Brito AH, Dohmann HJ, Abrão C, de Oliveira PS, Amino JG, Studart PC. [Correlation of the clinical aspects of the patient evaluated by functional class and left ventricular function in chronic aortic insufficiency. II. Stresses]. Arq Bras Cardiol 1988; 51:231-7. [PMID: 3251450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Peixoto EC, Barros Filho CM, Pohl BW, Renato J, Silveira CB, Pontes AC, Leite AA, Duarte EP, de Brito AH, Amino JG. [Aortic stenosis. Volume, mass, compliance, shortening velocity, contractility indices and effort (stress) of the left ventricle]. Arq Bras Cardiol 1986; 47:101-9. [PMID: 3579646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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