pilonidal cyst

Pathology

• a cyst in the sacral region (gluteal cleft), containing a hair which may act as a foreign body producing chronic inflammation
• it is thought to be initiated by the penetration of hair beneath the skin
• a cyst, abscess or sinus tract(s) may occur

More general terms

• dermoid cyst
• pilonidal disease

Additional terms

• pilonidal abscess
• pilonidal sinus/fistula