Nodular Hidradenoma: A Cytohistological Correlation on Fine-Needle Aspiration Cytology

Cytodiagnosis of adnexal tumors is challenging by virtue of an enormous number of individual tumors and their variant forms. We report a case of nodular hidradenoma in a male patient aged 59 years who presented with nodular swelling at the outer canthus of the left eye. Clear cell hidradenomas arise as nodules from eccrine sweat glands. It is an uncommon benign adnexal neoplasm that is more common in adults than in children. The diagnosis is usually based on histopathology, and the lesion is rarely diagnosed on fine-needle aspiration cytology (FNAC), hence merits mention. Overall our study established that the FNAC can be used as the first line of diagnostic investigation for most of the nodular lesions of the skin.