Abstract:【Objectives】 To evaluate the clinical application of working channels of percutaneous puncture transforaminal endoscopic biopsy in the thoracic and lumbar vertebral lesions. 【Methods】 28 cases (16 males and 12 females) with thoracic and lumbar vertebral lesions undergoing minimally invasive visualization percutaneous biopsy before operation between December 2012 and April 2014 were reviewed retrospectively. All cases had a mean age of 56.4 years(range, 19 to 78 years), Each case underwent X-ray, CT scanning and MRI before operation, and all presented with single level lesion or adjacent intervertebral disc disease in thoracic or lumbar spine with different degrees of vertebral body defect. 4 cases had defect in thorac (2 in T11, 2 in T12), and 24 cases had defect in lumbar(3 in L1, 4 in L2, 5 in L3, 5 in L4, 7 in L5). All cases underwent minimally invasive visualization percutaneous biopsy. And the pathological results after operation were compared with the preoperative biopsy. Data collection and statistical of the successful rate and complication of preoperative biopsy was analyzed. 【Results】 All cases were obtained confirmed pathologically, and 11 cases of malignancy, 2 cases of benign tumors, 8 cases of inflammatory lesion, 1cases of normal tissue. Biopsy pathology diagnosis positive rate was 96.4%. 26 cases was performed surgical treatment, biopsy pathological diagnosis is consistent with the postoperative pathological diagnosis, the diagnosis coincidence rate was 92.3%. 1 normal tissue after biopsy was verified as non-specificity inflammation; 1 Inflammatory granulation tissue was verified as eosinophilic granuloma of bone. They did not have been operation. All cases was no complication except for 1 case of T11 vertebral biopsy after operation appeared intercostals nerve tingling. 【Conclusions】 Minimally invasive visualization of biopsy in the thoracolumbar vertebral body lesions biopsy can obtain more sufficient amount of specimen under visual, biopsy pathologic diagnosis positive rate and biopsy pathology diagnosis and postoperative pathological diagnosis coincidence rate is high, is a kind of diagnosis and treatment of minimally invasive techniques.