Report of a rare case of gorham-stout disease of both shoulders: bisphosphonate treatment and shoulder replacement.

Massive osteolysis known as Gorham-Stout disease is a rare idiopathic disorder typically affecting long bones in a unifocal pattern. Angiomatosis is strongly connected to the osteolysis. Weather angiomatosis is the cause or the result of osteolysis is subject of intense discussion (Kawasaki et al.

[Hypophosphatemic osteomalacia].

Hypophosphatemic osteomalacia first presenting in adulthood is a rare disease. It is characterized by decreased serum phosphate, renal phosphate wasting, elevated alkaline phosphatase, and osteomalacia. The authors present a case with typical constellation of an oncogenic (tumor-induced) osteomalacia, the possible differential diagnosis, diagnostic evaluation, and complete healing after tumor resection.