Mammary analogue secretory carcinoma: A case report
Keywords:
salivary gland, secretory carcinoma, acinic cell carcinoma, mammary analog secretory carcinoma, ETV6-NTRK3 translocation, mammaglobin, S100, DOG1.Abstract
Background: Mammary analogue secretory carcinoma is a rare new entity of low-grade
malignant tumor of salivary glands. It shared the same histologic features and the chromosomal translocation t(12;15)(p13;q25) as secretory carcinoma of the breast.
Aim: To highlight the diagnosis approaches and the
attitude of management in a case of MASC which is the first case reported in Tunisia.
Reported case: A case of MASC of the lower left jugal mucosa was reviewed for its
microscopic and immunohistochemical features. Fluorescence in situ hybridization (FISH) for the ETV6–NTRK3 translocation was performed. Surgery was the only treatment required in this case. No signs of local or regional recurrence during the one-year follow-up were noticed.
Commentaries: Secretory carcinoma was confused with other salivary gland tumors especially acinic cell carcinoma due to their morphological similarities, making diagnosis dilemma. Fluorescence in-situ hybridization (FISH) is the one definitive finding to confirm the diagnosis of MASC and to differentiate it from the other types of salivary gland tumor. At the present time, no specific therapy is available for patients with MASC.
