Anal canal squamous cell carcinoma metastasizing to the thigh – A “carcinoma en cuirasse”-like rare presentation

Abstract

Anal canal squamous cell carcinoma (SCC) rarely metastasizes to the skin. We report an unusual case of anal SCC with metastasis to the thigh, presenting as an indurated plaque with “carcinoma en cuirasse”- like features. Cutaneous metastases from gastrointestinal malignancies occur in less than 4 % of cases and a diffuse plaque-like presentation is generally associated with breast or lung carcinoma. The case highlights a rare manifestation of anal cancer indicating widespread disease dissemination and poor prognosis.