Background: A 3-year prospective study was conducted to evaluate the efficacy of Xpert MTB/RIF (Xpert) in the diagnosis of pleural tuberculosis (pTB) on contrast -enhanced ultrasound (CEUS)-guided pleural biopsy specimens.
Method: Patients suspected with pTB were prospectively enrolled to receive CEUS-guided biopsy. Specimens (pleural tissue and fluid) were submitted for Xpert and other routine examinations. Surgical thoracoscopy was performed on undiagnosed cases.
Result: A total of 316 patients were enrolled, including 280 cases of pTB (definite 195, possible 85) and 36 cases of non-pTB. The sensitivity of Xpert was 69.64% (195/280) in biopsy specimens, which was significantly higher than that in pleural effusion specimens (p < 0.01). In 195 definite cases, the highest sensitivity of 100% (195/195) and NPV of 29.75% (36/121) were achieved by Xpert on biopsy specimens. Xpert-positive results were obtained in 149 culture-negative cases and 90 histopathological MTB PCR-negative cases. The incidence of necrosis by CEUS in Xpert-positive pTB was significantly higher than that in Xpert-negative pTB (χ = 72.41; p < 0.01). No serious complications occurred.
Conclusion: Xpert achieved highly diagnostic sensitivity in pTB through CEUS-guided biopsy sampling, especially on necrotic lesions, which was proven to be efficient, minimally invasive and safe.
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