[Fractures in benign bone cysts].

Etiology, clinical manifestations, roentgenographic appearance and histological variations of solitary and aneurysmatic bone cyst are reported. The classification of solitary bone cyst into active and inactive cysts is important therefore prognosis and treatment are different. The critical control of our patients with fractured solitary and aneurysmatic bone cysts since 1973 resulted in a very contenting management of treatment. Active solitary bone cysts, recurrent cysts, fractured cysts and large cysts close to joints are treated by segmental resection, interposing of ribs, homologous or autogenous cancellous bone graft and plate osteosynthesis. We never found recidives under this treatment. The only curettage of active solitary bone cyst frequently is accompanied by recidive and unsatisfying functional results. Reports of local corticoid injections in treatment of bone cysts should be furthermore controlled critical.