RESUMEN
OBJECTIVES: This study aim was to review cases of acinic cell carcinoma (the main differential diagnosis of secretory carcinoma) that were diagnosed and treated at the National Cancer Institute of Brazil (INCA) between 1996 and 2016. The primary objective was to identify underdiagnosed cases of secretory carcinoma via a clinical, immunopathological and molecular reassessment. MATERIALS AND METHODS: This is a cross sectional study, with retrospective data collection from medical records and histological specimen review, with staining for periodic acid-Schiff (PAS) and PAS with diastase, immunohistochemistry for S-100, mammaglobin, and DOG-1, and droplet digital RT-PCR for ETV6-NTRK3. The Research Ethics Committee approved this study, and the patients allowed their participation through informed consent. RESULTS: Eighty-three cases of acinic cell carcinoma were diagnosed and treated in the specified period at INCA, of which, seven had their diagnosis changed to secretory carcinoma. CONCLUSION: The present study adds seven cases of secretory carcinoma to the literature, contributing to a better understanding of the epidemiological, histological, immunohistochemical and molecular characteristics of this recently described tumor. Also, the use of a comprehensive diagnostic approach, including immunohistochemical and molecular methods, along with classical morphological studies, allowed the reclassification of acinic cell carcinoma to secretory carcinoma.
Asunto(s)
Carcinoma de Células Acinares , Neoplasias de las Glándulas Salivales , Biomarcadores de Tumor/genética , Biomarcadores de Tumor/metabolismo , Carcinoma de Células Acinares/metabolismo , Carcinoma de Células Acinares/patología , Estudios Transversales , Humanos , National Cancer Institute (U.S.) , Estudios Retrospectivos , Neoplasias de las Glándulas Salivales/metabolismo , Neoplasias de las Glándulas Salivales/patología , Estados UnidosRESUMEN
Prostate melanosis is an uncommon lesion of uncertain etiology where melanin deposition is seen in the epithelium, in the stroma, or in the form of a blue nevus. There are three reports in the literature of melanosis seen in association with prostatic adenocarcinoma. This is the fourth report of this association.
Asunto(s)
Carcinoma de Células Acinares/patología , Melanosis/patología , Próstata/patología , Neoplasias de la Próstata/patología , Anciano de 80 o más Años , Carcinoma de Células Acinares/complicaciones , Carcinoma de Células Acinares/metabolismo , Humanos , Inmunohistoquímica , Masculino , Melaninas/metabolismo , Melanosis/complicaciones , Melanosis/metabolismo , Próstata/metabolismo , Neoplasias de la Próstata/complicaciones , Neoplasias de la Próstata/metabolismo , Células del Estroma/metabolismo , Células del Estroma/patologíaRESUMEN
BACKGROUND: Integrins, heterodimeric transmembranic adhesion molecules composed of alpha and beta subunits, have been implicated in normal and neoplastic biological processes. We investigated the patterns of expression of integrins subunits beta 1, beta 3 and beta 4 in neoplasms derived from the terminal segment of salivary glands in order to understand their expression patterns in the different structures of these tumours. METHODS: Immunohistochemistry using 'catalized signal amplification' (CSA) detection system was applied to paraffin-embedded specimens of polymorphous low-grade adenocarcinoma, adenoid cystic carcinoma and acinic cell carcinoma. Normal salivary glands were used as controls. RESULTS: Immunoexpression of integrins showed that neoplastic structures of the tumours studied tend to mimic the patterns seen in the normal structures of salivary glands from which they are derived. Anaplastic cells were negative for all integrins. CONCLUSIONS: This study revealed detailed topography of integrins in malignant tumours derived from intercalated acinar segment of salivary gland and this might be useful in the diagnosis of these lesions, especially of fine-needle aspiration (FNA) products or small specimens derived form incisional biopsies.