The recurrence rate of pilonidal sinuses after surgery is purported to be as high as 50% with incision and drainage. Procedures that leave a midline scar are the most susceptible to further hair penetration.
Recurrence rates with other techniques are:
Phenol injection: 8% to 9%
Fibrin injection: 5% to 29%
Excision with healing by secondary intention: 2% to 42%
Karydakis flap: 0% to 6%
Rhomboid (Limberg) flap: 0% to 24%
Bascom cleft-lift: 0% to 11%
Sinusectomy (trephination/Gips procedure): 0% to 16%
Endoscopic pilonidal sinus treatment: 0% to 15%
Reference
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