[Bone biopsy of uncertain bone lesions using a new biopsy cannula measuring 1.4 mm].

Bone biopsy for the clarification of ambiguous lesions has until now been the last resort in diagnostic procedures because obtaining the material for histological evaluation has involved very traumatizing methods (biopsy by surgical intervention, percutaneous biopsy with high-caliber needles). A new bone-biopsy apparatus has now been developed that is provided with a cannula not much larger than a fine needle (1,4 mm); it can be used to obtain histologically evaluable biopsy material from almost all regions of the skeletal system. As the procedure can be carried out under local anesthesia, there is no undue stress to the patient. The complication risk is no higher than when using conventional fine-needle biopsy. Despite the small diameter of this needle it is possible to obtain biopsy specimens not only of osteolytic but also of osteoplastic lesions. An electric motor (20 rotations/min) is the power source for apparatus. The value of bone biopsy in diagnostic procedures has increased considerably.