Yetim, IbrahimSemerci, ErsanOzkan, Orhan VeliPaltaci, IlhanDiner, Guvenc2024-09-182024-09-1820111309-07201309-2014https://doi.org/10.4328/JCAM.183https://hdl.handle.net/20.500.12483/11713Pilonidal sinus disease is usually placed in sakrokoksigeal area. The etiology is unknown exactly. The pathogenesis is assumed to deciduous hair penetration into the subcutaneous tissues and a foreign body-type reaction may then lead to formation of an abscess. Cellulitis, abscesses, fistulas are common complications in pilonidal sinus disease. Chronic inflammation may be factors in the development of some malignancies. Malignant degeneration is very rare complication in chronic pilonidal disease. We reported in this case, a squamous cell carcinoma in caused by untreated chronic pilonidal sinus.trinfo:eu-repo/semantics/openAccessPilonidal Sinus DiseaseSquamous Cell CarcinomaArticle21313310.4328/JCAM.1832-s2.0-79952225992N/AWOS:000215542500009N/A