Background: To investigate the results and analyze the diagnostic value of the combined application of EBUS-TBNA and T-SPOT in patients with granuloma in mediastinal-hilar lymph nodes. Methods: Patients who underwent EBUS-TBNA and pathologically confirmed as lymph node granulomatous lesions from January 2020 to May 2021 were retrospectively recruited. The baseline clinical characteristics, tuberculosis T cell spot test, pathological and imaging results of these subjects were collected. The common disease accompanied by granulomas lesion in mediastinal-hilar lymph nodes were analyzed and compared. Results: Our results represented that among 60 patients with lymph node granulomatosis, caseous necrosis was only detected in 2 cases, 13 cases with positive acid-resistant staining were diagnosed as lymphoid tuberculosis, however, none of them manifested the typical symptoms of tuberculosis poisoning. 5 cases were diagnosed as sarcoidosis, and oral prednisone acetate tablets were effective. T-SPOT test results showed a positive result in 26 cases, we noticed that the positive acid-resistant staining cases (T-SPOT detection in 9 cases) had higher antigen values of T-SPOT than the other 17 cases with positive T-SPOT (P<0.01) Conclusion:EBUS-TBNA combined T-SPOT test has great significance to differentiate lymphoid tuberculosis and sarcoidosis, helping promote the diagnostic rate of granulomas lesion in mediastinal-hilar lymph nodes.
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