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JOURNAL ARTICLE

Combined transbronchial needle aspiration and (99m)Tc-2-methoxy-isobutyl-isonitrile single photon emission computed tomography for diagnosing enlarged mediastinal lymph nodes

Alfonso Fiorelli, Pierfrancesco Rambaldi, Giovanni Vicidomini, Umberto di Serio, Marina Accardo, Antonio Rotondo, Mario Santini
Archivos de Bronconeumología 2014, 50 (1): 3-9
24291006

BACKGROUND: To demonstrate the diagnostic accuracy of an integrated approach of blind trans-bronchial needle aspiration (TBNA) and (99m)Tc-2-methoxy-isobutyl-isonitrile single photon emission computed tomography ((99m)Tc-MIBI-SPECT) in diagnosing mediastinal lymph adenopathy.

METHODS: Sixty one consecutive patients with mediastinal lymph adenopathy undergoing both TBNA and (99m)Tc-MIBI-SPECT were prospectively enrolled. Mediastinoscopy was attended in case of negative TBNA.

RESULTS: Eighty three adenopathies were sampled (73 malignant and 10 benign). Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) of TBNA was 74%, 100%, 100%, and 34%, respectively; and of (99m)Tc-MIBI-SPECT was 96%, 80%, 97%, and 73%, respectively. Combining TBNA and (99m)Tc-MIBI-SPECT results sensitivity, specificity, PPV, NPV of 97%, 100%, 100%, and 83%, respectively, was obtained. TBNA alone avoided medistianoscopy in 65% of cases, while an integrated approach could have potentially obviated mediastinoscopy in 76%.

CONCLUSIONS: (99m)Tc-MIBI-SPECT improved the sensitivity and the NPV of TBNA, reducing the need of mediastinoscopy.

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