title: Carcinoma ex pleomorphic adenoma in a Brazilian population: clinico-pathological analysis of 38 cases.
abstract: Carcinoma ex pleomorphic adenoma (CXPA) is a rare tumour, with different prevalence rates reported among studies. Epidemiological studies of large series of CXPAs in developing countries are scarce. The aim of the present study was to describe Brazilian patients with CXPA; this was a retrospective study of 38 patients. Demographic and clinico-pathological features were evaluated. No preferential gender was found, and the mean age at diagnosis was 57.6 years. The most commonly involved site was the parotid, followed by the submandibular and the minor salivary glands. A prevalence of clinical stages III and IV was observed at diagnosis. The most common histological subtypes were salivary duct carcinoma, adenocarcinoma not otherwise specified, myoepithelial carcinoma, and epithelial-myoepithelial carcinoma. Moreover, by invasive phase, most were frankly invasive carcinoma. Recurrence was observed in seven out of 24 patients with outcome information available, and all were invasive cases. All seven patients died of causes related to the disease. The distributions of cases according to age, gender, tumour location, and clinical stage were similar to those reported in the literature. Frankly invasive cases presented a worse prognosis. More information is needed to further our understanding of the clinico-pathological aspects of CXPA.
authors.affiliation: Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, São Paulo, Brazil. fmariano@fcm.unicamp.br
authors.forename: F V
authors.initials: FV
authors.lastname: Mariano
authors.forename: A L F
authors.initials: AL
authors.lastname: Noronha
authors.forename: R O
authors.initials: RO
authors.lastname: Gondak
authors.forename: A M de A M
authors.initials: AM
authors.lastname: Altemani
authors.forename: O P
authors.initials: OP
authors.lastname: de Almeida
authors.forename: L P
authors.initials: LP
authors.lastname: Kowalski
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D008949:Adenoma, Pleomorphic / Q000473:pathology*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000473:pathology*; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009208:Myoepithelioma / Q000473:pathology; D009361:Neoplasm Invasiveness / Q000473:pathology; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D012189:Retrospective Studies; D012468:Salivary Gland Neoplasms / Q000473:pathology*