A Case of Tubulopapillary Cystic Adenoma with Apocrine Differentiation

Abstract

A 56-year-old man presented with a nodular lesion on the head. The lesion had gradually increased over recent years. He had a 15×15 mm reddish nodule with erosion, and an erythematous prominence in the center. The nodule was surgically excised in January of 2017. Pathologically, syringocystadenoma papilliferum, tubular papillary adenoma, and apocrine gland cyst coexisted, so it was diagnosed as a recently proposed "tubular papillary cystic adenoma with apocrine differentiation". We discussed this new concept in the paper.