[Implant-related fractures of the femoral neck cone adapter of a modular short-stem hip prosthesis - patient management and operative technique].

Aim: In cases of unexpected and implant-related mechanical failures, optimal surgical treatment and provident information for the patients are mandatory. We describe the surgical method to revise the hip stem after fracture of the modular cone adapter of a short-stem hip prosthesis and the management of and information for all patients who have received a fracture-prone implant.

Method: We present two out of four cases in a series of fractures of the femoral neck cone adapter of a modular short-stem hip prosthesis.

[Pyoderma gangrenosum: and important differential diagnosis from wound infection. Case report of a life threatening course].

Pyoderma gangrenosum (PG) is a necrotizing and ulcerative skin disease of unknown cause. The pathogenesis is thought to be related to a defective immune response. The ulcerations appear spontaneously or after skin trauma.