This document presents a case of a 21-year-old female who presented with right nasal obstruction and discharge for two years. Imaging showed total opacification of the right sphenoid sinus and a polypoidal mass in the right nasal cavity. The patient underwent endoscopic sinus surgery where the mass was excised. Histopathology revealed secretory carcinoma (SC), previously known as mammary analogue secretory carcinoma (MASC). The patient had a second surgery for clear margins and is currently in remission with regular follow ups. The document then discusses SC/MASC as a rare salivary gland carcinoma that can rarely affect the sinonasal tract, and outlines its clinical features, diagnosis, treatment and prognosis.