[Treatment of osteoid osteoma with percutaneous resection under computerized tomography control. Apropos of 5 cases].

Osteoid osteoma is a benign tumor requiring a surgical resection. An original technique is reported: the nidus was first located by computed tomography and then reached and resected through a small percutaneous approach. A special device, similar to those of knee arthroscopy or percutaneous discotomy has been designed. Five patients have been thus treated successfully (1 femoral neck, 1 trochanter, 1 femur, 2 tibias). Recent progress in radiology for management of bone tumors (scintigraphy, angiography) have given greater accuracy in the preoperative diagnosis of osteoid osteoma. It is thus possible to dispense with an histological proof in case of destruction of the nidus. However a new device is now designed to achieve true "en bloc" resection of the nidus.