A pilonidal sinus is a small tunnel that develops at the top of the crease in the buttocks. Trapped hair around the buttocks crease can lead to an abscess, and a pilonidal sinus may develop as a ...

This procedure works well for a pilonidal sinus and there are no serious concerns about its safety. A pilonidal sinus is a small infected cavity under the skin between the buttocks, just above the ...

A pilonidal sinus is a small infected tract or a network of interlinking tracts under the skin between the buttocks. The exact cause is unknown but it may be from loose hairs pushing into the skin, ...

From the Department of Surgery, Peter Bent Brigham Hospital, Boston, Massachusetts. Glenn — On staff of the New York Hospital, New York City. For record and address of author see "This Week's Issue," ...