title: Carcinoma developing in pilonidal sinus: Report of two cases and review of the literature.
mesh_terms: D002081:Buttocks; D002294:Carcinoma, Squamous Cell / Q000150:complications* / Q000401:mortality / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D010864:Pilonidal Sinus / Q000150:complications* / Q000601:surgery; D013997:Time Factors