title: Squamous cell carcinomas of the anus appearing as a primary inguinal mass.
mesh_terms: D001005:Anus Neoplasms / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D006801:Humans; D007264:Inguinal Canal / Q000473:pathology*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged