title: Recurrent carpal tunnel syndrome owing to an implantation epidermoid cyst after carpal tunnel decompression: case report.
abstract: OBJECTIVE
  Implantation epidermoid cysts have been reported after a variety of surgical procedures. Although carpal tunnel surgery is the most common peripheral nerve operation, there have been no previous reports of these cysts after carpal tunnel decompression. We present a case of an implantation epidermoid cyst after carpal tunnel surgery.
  
  
  METHODS
  A 41-year-old man presented with recurrence of carpal tunnel syndrome and an enlarging mass at the site of his previous carpal tunnel decompression.
  
  
  METHODS
  The operation site was re-explored, and a subcutaneous mass was removed. This was histologically shown to be an implantation epidermoid cyst.
  
  
  CONCLUSIONS
  The possibility of an implanted epidermoid cyst should be considered in any patient who presents with a recurrence of carpal tunnel symptoms and a mass at the site of the previous operation. It is possible that the occurrence of these cysts may be related to the use of polyglactin sutures for wound closure. In this case, the result of surgery was excellent.
authors: Hu Liang
authors: HL
authors: Low
authors: Viraliur P
authors: VP
authors: Sivasamy
authors: A Paul
authors: AP
authors: Griffiths
authors: Robert M
authors: RM
authors: Redfern
mesh_terms: D000328:Adult; D002349:Carpal Tunnel Syndrome / Q000209:etiology / Q000517:prevention & control* / Q000601:surgery*; D019299:Decompression, Surgical / Q000009:adverse effects; D004814:Epidermal Cyst / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D008297:Male; D012008:Recurrence