Poroid Hidradenoma: A Rare Finger Lesion.

Poroid hidradenomas are uncommon tumors originating from eccrine sweat glands, often presenting as dermal nodules predominantly composed of cuticular and poroid cell types. They belong to the broader category of poroid neoplasms, which include hidroacanthoma simplex, dermal duct tumor, and eccrine poroma. Despite their rarity, poroid hidradenomas require accurate diagnosis and appropriate management due to potential overlaps in their histological features with other adnexal tumors, including digital papillary adenocarcinoma. We report a case of a 56-year-old female presenting with a nodular lesion on the palmar aspect of her right middle finger, which was excised under local anesthesia. Histopathological examination confirmed the diagnosis of poroid hidradenoma, highlighting the importance of maintaining a high clinical suspicion and precise histological evaluation in managing such an uncommon dermatological condition of the finger.