Clinical value of Metagenomic Next- and Third-Generation Sequencing applied in ultrasound-guided puncture biopsy for diagnosing lymph node tuberculosis

Objectives The aim of this study was to assess the clinical utility of metagenomic next-generation sequencing (mNGS) and metagenomic third-generation sequencing (mTGS) in diagnosing cervical lymph node tuberculosis through analysis of lymph node tissue. Methods This study recruited 101 patients with suspected cervical lymph node tuberculosis and took samples under ultrasound guidance. Parallel culture, X-pert, mNGS and mTGS workflows to each sample were performed. Taking clinical diagnosis as the gold standard, We comparatively compared diagnosis performance of the four methods. Results Clinically, 76 cases were diagnosed as lymph node tuberculosis and 20 cases were non-lymph node tuberculosis. Compared with clinical diagnosis, the sensitivities of mNGS and mTGS were 89.47 % and 82.89 %, respectively, significantly higher than those of culture and X-pert which were 43.28 % and 68.42 %, respectively (P Conclusion mNGS and mTGS play a crucial role in the rapid diagnosis and accurate treatment on Cervical lymph node tuberculosis.