We report a 58-year-old Chinese female who presented with a pigmented skin lesion on the right thigh, associated with a single ipsilateral inguinal lymph node without distant metastases detected. A wide excision of the tumour, split skin graft coverage and an en-bloc ipsilateral superficial groin dissection was performed. Histopathology revealed malignant skin adnexal tumour or porocarcinoma, with nodal metastases. She is presently at six months follow-up without any recurrence.
Porocarcinoma is a rare malignant tumour, arising from the intra-epidermal ductal portion of the eccrine sweat gland, also known as “acrosyringium”.’ According to the histological typing of skin tumours, it is an eccrine carcinoma that may arise de nova or develop in eccrine poroma, its benign counterpart, as an entirely intra-epidermal tumour or with an invasive dermal component.
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