Primary melanoma of the oral cavity: A multi-institutional retrospective analysis in Brazil.
Med Oral Patol Oral Cir Bucal
; 26(3): e379-e386, 2021 May 01.
Article
en En
| MEDLINE
| ID: mdl-33340079
ABSTRACT
BACKGROUND:
Melanoma is an aggressive malignant tumor, rarely observed in the oral cavity. The aim of this study was to describe the clinicopathologic features of a series of oral melanomas. MATERIAL ANDMETHODS:
A retrospective descriptive study was performed. A total of 15,482 biopsy records from two oral and maxillofacial pathology services in Brazil were analyzed. All cases of oral melanomas were reviewed, and clinical, demographic, histopathological data, treatment, and follow-up status were collected. In addition, immunohistochemistry stains (pan-cytokeratin AE1/AE3, vimentin, α-SMA, CD45, S-100 protein, HMB-45, Melan A, and Ki-67) were performed.RESULTS:
The series comprised of 5 males (71.4%) and 2 females (28.6%), with a mean age of 58.0 ± 9.2 years (range 45-69 years) and a 2.51 male-to-female ratio. The gingiva (n = 3, 42.8%) and hard palate (n = 2, 28.6%) were the most common affected sites, presenting clinically as ulcerated swellings with a brown to black color. Cervical lymph node metastasis was detected in three patients during the first examination. Microscopically, 6 cases (85.7%) were melanotic, and one (14.3%) was amelanotic. Most cases (n = 4, 57.1%) presented a predominance of epithelioid cells. S-100 and HMB-45 were positive in all cases (n = 7, 100.0%). In contrast, only 4 cases (57.1%) were positive for Melan-A. The proliferative index with Ki-67 was high, with labeling index ranging from 70.0% to more than 90% of positive cells. Five patients died from complications of the tumors after a mean follow-up period of 7.8 months.CONCLUSIONS:
Melanoma is an aggressive malignant tumor that rarely occurs in the oral cavity. It occurs mainly in adult and elderly patients and often is diagnosed in advanced stages. The current findings were similar to previous studies and reflected the characteristics of the services from where lesions were retrieved.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Neoplasias de la Boca
/
Melanoma
Tipo de estudio:
Diagnostic_studies
/
Observational_studies
Límite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Med Oral Patol Oral Cir Bucal
Asunto de la revista:
ODONTOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Brasil