Fig. 2

62-year-old male, lumbar MRI suggests the first lumbar vertebral metastases. The above figure shows the process of lumbar puncture biopsy using modified OSBF. A Puncture point positioning under CT guidance before operation; B-D Insert the guide needle; E Insert the casing channel; F Insert modified OSBF; G Under Vacuum Suction, the modified OSBF rotates forward and cuts the lesion; H Intraoperative CT guided positioning; I Specimen obtained during puncture