[Origin and treatment of bone cysts].

Osteocyst is shown to be the resulting issue of a number of pathological processes in bones, its etiology could be determined only if tissues typical for some lesions are revealed in cystic walls. At the CITO department of bone pathology for adults the author observed 49 patients having cysts of the proximal femoral portion. Pathological fractures were noted in 16 of 49 patients. It is the author's opinion that a carefully selected anamnesis and clinico-roentgenological investigation are of great importance in establishing the diagnosis of an isolated osteocyst. The differential diagnosis is made between this lesion and tumors, inflammatory process, Recklinghausen disease, etc. All patients under investigation were treated surgically. The results of treatment are described.