Hidradenocarcinoma in a young Caucasian male, arising from a metatarsophalangeal joint and presenting with inguinal lymphadenopathy

Abstract

We report a case of a 25-year-old male with primary hidradenocarcinoma arising from the medial aspect of the left metatarsophalangeal joint who presented with palpable inguinal lymphadenopathy. The patient was able to give a corroborated history of the primary lesion being present for 4 years prior to the development of his groin swelling. Initial biopsy of the primary lesion suggested a malignant adnexal tumour. He underwent wide local excision of the primary lesion and therapeutic inguinal lymph node dissection. Review of the excision specimens established the diagnosis of hidradenocarcinoma. We discuss this case due to the rarity of the site of the tumour and demographics of the patient. There is limited data available on hidradenocarcinoma and there is no consensus on what should constitute standard identification and management.