Abstract
BackgroundTo demonstrate the diagnostic accuracy of an integrated approach of blind trans-bronchial needle aspiration (TBNA) and 99mTc-2-methoxy-isobutyl-isonitrile single photon emission computed tomography (99mTc-MIBI-SPECT) in diagnosing mediastinal lymph adenopathy. MethodsSixty-one consecutive patients with mediastinal lymph adenopathy undergoing both TBNA and 99mTc-MIBI-SPECT were prospectively enrolled. Mediastinoscopy was attended in case of negative TBNA. ResultsEighty-three adenopathies were sampled (73 malignant and 10 benign). Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of TBNA was 74%, 100%, 100%, and 34%, respectively; and of 99mTc-MIBI-SPECT were 96%, 80%, 97%, and 73%, respectively. Combining TBNA and 99mTc-MIBI-SPECT results sensitivity, specificity, PPV, NPV of 97%, 100%, 100%, and 83%, respectively, were obtained. TBNA alone avoided mediastinoscopy in 65% of cases, while an integrated approach could have potentially obviated mediastinoscopy in 76%. Conclusions99mTc-MIBI-SPECT improved the sensitivity and the NPV of TBNA, reducing the need of mediastinoscopy.
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