Abstract:Objective To study the diagnostic efficacy of serum chitosanase 40 (YKL-40) in patients with renal tuberculosis and to analyze its relationship with renal tuberculosis. Methods Forty-six patients with renal tuberculosis who were admitted to our hospital from August 2012 to August 2017 were selected as the tuberculosis group. The other 46 healthy volunteers who were examined in our hospital during the same period were selected as the control group. The levels of serum YKL-40 were observed in two groups and the diagnostic value of YKL- 40 in renal tuberculosis was analyzed. Results The levels of serum YKL-40 in the study group were significantly higher than those in the control group (t = 7.168, P = 0.000). The levels of YKL-40 in the lesions of patients with renal tuberculosis were significantly higher than those in surrounding healthy tissues (t = 4.112, P = 0.000). 30 cases (32.61%) were positive for renal tuberculosis determined by PCR, and 62 cases (67.39%) were negative. However, the positive rate of YKL-40 in detecting renal tuberculosis was higher than that of PCR (P < 0.05). The area under the ROC curve of YKL-40 was 0.930, under the ROC curve of PCR was 0.790, and under the ROC curve of YKL-40 was larger than that of PCR (P < 0.05). Conclusions YKL-40 has higher diagnostic efficacy for renal tuberculosis.