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Fig. 1 —Photograph shows three needle types for biopsy of bone lesions. First type is Bonopty coaxial system (C. R. Bard, Inc.) (A). Introducer (1) with trocar (below) traverses soft tissue. Trocar is removed to allow drill bit (2) to replace it and traverse bone. Note cutting portion of drill bit (straight arrow). Once in position, bit is removed to allow bone biopsy needle (3) with trocar (below) to be positioned. Once positioned, biopsy needle trocar is removed and biopsy sample is obtained. Second type is Quick-Core biopsy "gun" (B) (Cook) for soft-tissue cores only. Note illustrated needle is 9 cm long; a longer needle is required to fit through Bonopty coaxial system. Third type of needle is 11-gauge InterV Traplok system (C) (Medical Device Technologies, Inc.). Note detail of trap device (curved arrow) to help retain biopsy tissue core within needle.