Pilonidal
sinus or sacrococcygeal fistula is a cyst or abscess near or on the natal cleft
of the buttocks that often contains hair and skin debris. The sinus track goes
in a vertical direction between the buttocks. Rarely, a pilonidal sinus occurs
in other sites of the body. The
exact cause is not clear. This report describes a 31-year-old man with
pilonidal sinus who was complaining...