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M.B.B.S., F.R.C.S
MBBS, FCPS (Surgery)
MBBS, FCPS, FRCS
MBBS, FCPS,
MBBS, FCPS
MBBS, FRCS, FCPS
MBBS, LRCP, MRCS, FRCS
MBBS
A pilonidal sinus is a small hole or ""tunnel"" in the skin. It usually develops in the cleft of the buttocks where the buttocks separate. More than one hole may develop, and often these are linked by tunnels under the skin. Most people associate the word sinus with the nose, but sinuses can occur anywhere in the body.