A rare case of a recently described entity: mammary analogue secretory carcinoma (MASC) of the parotid gland

espanolCSAM es un tumor de glandula salival que comparte caracteristicas histologicas, inmunologicas y geneticas con el carcinoma secretor mamario, que incluye una translocacion ETV6 y positividad inmunocitoquimica para la proteina S-100, CK7 y mamaglobina, asi como negatividad para DOG1. Este es un tumor raro con caracteristicas poco comunes en comparacion con otros tumores de glandulas salivales. El caso referido aqui es el de una paciente de 28 anos de edad que se presento en la sala de emergencias debido a una masa palpable en la region parotidea izquierda. Se sometio a una parotidectomia superficial con un abordaje de mini-lifting, con reseccion tumoral, seguida de radioterapia. El tumor identificado compartia la mayoria de las caracteristicas clinicas con otros casos de CSAM descritos en la literatura. EnglishMASC is a salivary gland tumour which shares histological, immunologic and genetic characteristics with mammary secretory carcinoma including an ETV6 translocation and immunocytochemical positivity for S-100 protein, CK7, and mammaglobin as well as negativity for DOG1. This is a rare tumour with uncommon characteristics when compared to other salivary gland tumours. The case reported here is of a 28-year-old female patient who presented in the ER due to a palpable mass in the left parotid region. She underwent a superficial parotidectomy with using a mini-lifting approach, with tumour resection, followed by radiotherapy. The identified tumour shared most of the clinical characteristics with other cases of MASC described in the literature.