An elderly man with a vascular axillary mass

Abstract

A 94-year-old man presented with a painless, asymptomatic left axillary mass that grew over 25 years. The patient denied personal or family history of skin or breast cancer. The smooth pink pedunculated vascular mass measured 3.6 cm × 2.1 cm (Fig 1). Biopsy revealed glandular structures with luminal decapitation elements and micropapillary structures. The glandular components infiltrated the surrounding fibroadipose and breast tissue. Tumor cells had clear cytoplasm and high-grade features (including pleomorphic hyperchromatic nuclei, numerous mitoses, and atypical forms) (Fig 2) and stained positive for gross cystic disease fluid protein 15 (GCDFP-15).