[Gorham-Stout syndrome (GSS) with fulminant aseptic osteonecrosis of the shoulder].

We report here a case of the rare Gorham-Stout syndrome (GSS) of the humerus. GSS is a disease in the course of which spontaneous idiopathic osteolysis occurs. We describe a case of a 46-year-old business economist who suffered an inadequate trauma and within 3 weeks developed self-limited idiopathic osteolysis of the left humerus head, also affecting the rotator cuff. This could be diagnosed especially on the basis of histopathological findings. Hereupon we indicated operative repair by means of inverted shoulder joint endoprosthesis.