Squamous Melanocytic Tumour at an Unusual Site: An Uncommon Case and Literature Review

*Corresponding author: Barbara Barbosa*, Salvador J. Diaz-Cano and Alexandre Abramavicus

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We herein present a case report of a 60-year-old male patient diagnosed with squamous-melanocytic tumour (SMT) in his anal region, comprised of two intermingled different phenotypic lesions. This dual tumour is quite uncommon and could potentially be challenging on both diagnose and also management. It is the first case reported on this location, moreover, the lack of consensus for these lesions makes it difficult to classify them. We reviewed the literature of similar SMT’s and discussed its histogenesis. As they are rare, their biological behavior and potential metastasis remain unclear. Therefore, close follow-up is advised.


Combined neoplasia; Squamous-melanocytic tumour; Uncertain; Anal canal.