Anterior chest wall pilonidal sinus: Disease at a rare site

Pilonidal sinus is defined as an infected tract in the skin, commonly containing a tuft of hair. The most common locations are buttocks, axillae, groin, etc., but it can also develop at rare locations. We present the case of a 24-year-old, hirsute male with recurrent infected discharging sinus on the anterior chest wall, at a tertiary care hospital in Karachi. The patient had earlier undergone incision and drainage multiple times before he finally came to us. On evaluation and exploration a sinus tract containing a tuft of hair was excised from the anterior chest wall. A pilonidal sinus can develop in any area containing hair under friction. Hence, it should be included under the differential diagnosis of any long-standing sinus over a hairy area.