Replantation of a circumferentially degloved thumb in an occupational crush injury - A case report and review of the literature.

Background: Degloving injuries of the fingers and especially the thumb are highly demanding problems in hand surgery and replantation often is not successful because of severe soft tissue contusion. Only few cases of successfull replantation for hand degloving injuries in thumbs are reported in literature.

Case Presentation: We present the case of a young right hand dominant worker experiencing an occupational accident with a circumferential avulsion of his right thumbs' soft tissue at the level of the metacarpophalangeal (MCP) joint with complete skeletization of his thumb and a deep laceration of the nail bed as he got trapped in a machine.Bony structures and tendons remained intact corresponding Urbaniak class III/Kay class IV injury. Immediate defect coverage by replantation was performed.Additionally, a deep palmar soft tissue defect to his middle finger pulp and a laceration with disruption of his eighth finger nerve on his ring finger was adressed by revision, debridement, direct coaptation of the nerve and occlusive dressing to the middle finger.The patient regained full function and excellent cosmesis without nail deformity but only protective sensibility. He is back to his former sports and occupation.

Conclusions: Though sensitive outcome is poor we recommend primary attempt for defect coverage with replantation following degloving to achieve pliable skin coverage and good cosmesis. Especially in Urbaniak III cases with complete soft tissue degloving lacking fractures or tendon lacerations good functional outcome is possible but we recommend to consent the patient in advance for other reconstructive options and give them realistic exspectations in case of failure.Contrary to popular belief replantation of completely degloved fingers is more than saving nonfunctional parts as motivated patients are able to get back to previous sports and occupation after successful replantation.