Surgical combination for umbilical pilonidal sinus: Punch excision followed by chemical cauterization of base with 88% phenol

The pilonidal sinus is a localized granulomatous reaction of trapped hair shaft in the epidermis and dermis, resulting in foreign body reaction and recurrent infections.1 It is most commonly encountered in sacro-coccygeal area and less commonly in the groin, umbilicus, supra-pubic area, nose, inter-digital web, prepuce, inter-mammary region, clitoris, penis, foot, and occiput. There are numerous noninvasive (personal hygiene, shaving, hair extraction, laser hair removal, etc.,) and invasive (minor incision, sinus curettage with hair removal, excision followed by reconstruction, flap surgery, umbilectomy, etc.,) treatments available.