A case series of three atypical cases of syringocystadenoma papilliferum with thigh, abdomen and axillary involvement, and review of literature

Syringocystadenoma papilliferum is an uncommon benign apocrine gland tumour, mostly of congenital or early childhood onset, affecting head and neck. In addition, nevus sebaceous is commonly associated with this tumor. Here, we document three cases of syringocystadenoma papilliferum with many atypical features, such as the involvement of rare sites (abdomen, axilla and thigh), absence of nevus sebaceous and coexistence of tubular apocrine adenoma. The histopathologic characteristics were consistent with the diagnosis in all three cases.