Nodular cystic hidradenoma over the gluteal region: A rare cytomorphological diagnosis

Abstract

The primary as well as metastatic tumours of the skin can be diagnosed by fine-needle aspiration cytology (FNAC) because of its easy accessibility; however, the cytomorphological features of skin adnexal tumours are rarely described in literature. A young male presented with solitary subcutaneous nodule over gluteal region measuring 3 cm in diameter for 2 years. FNAC was done and showed an overcrowded cluster of basaloid to polyhedral cells intermingled with hyaline material and foamy macrophages. Few squamous cells were also seen along with foci of calcification. A cytological diagnosis of adnexal tumor, possibly of eccrine origin was given. The excised nodule was received for histopathological examination, and a final diagnosis of nodular cystic hidradenoma was made. Hence, awareness of cytological features by FNAC of skin adnexal tumors is important to prevent misdiagnosis.

Keywords

• Adnexal tumor
• eccrine
• fine-needle aspiration
• nodular hidradenoma