Nodular hidradenoma over the leg

Nodular hidradenoma is a rare benign tumour of eccrine sweat gland. It usually presents as a solitary, intradermal nodule 0.5 -2 cms in diameter in most instances. It may be red, brown or bluish and sometimes may show superficial ulceration. We are presenting a case report of 50 years old female who presented with painless swelling measuring 3×3 cms over right leg for 2 years. Excisional biopsy of swelling showed findings suggestive of eccrine hidradenoma. Preoperative diagnosis is often difficult and diagnosis of benign nodular hidradenoma can only be established after biopsy. Carcinoma of sweat gland often mimics benign tumour and a definitive diagnosis of benign nodular hidradenoma is made after biopsy.