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Combined transbronchial needle aspiration and positron emission tomography for mediastinal staging of NSCLC

¹ Pulmonary Medicine, ² Thoracic Surgery, ³ Institute of Pathology and, ⁴ Nuclear Medicine, University Hospital Basel, Basel, Switzerland.

CORRESPONDENCE: P. N. Chhajed, Pulmonary Medicine, University Hospital Basel, Petersgraben 4, CH-4031, Basel, Switzerland. Fax: 41 612654587. E-mail: pchhajed{at}uhbs.ch

Keywords: Bronchoscopy, lung cancer, mediastinoscopy, transbronchial needle aspiration

Received: October 27, 2005
Accepted January 24, 2006

There are no data available combining transbronchial needle aspiration (TBNA) of mediastinal lymph nodes and positron emission tomography (PET) in the staging of nonsmall cell lung cancer (NSCLC).

The aim of the current study was to determine if these two methods can enhance the negative predictive value of the individual modality alone, for a specific lymph node station, and if this integrated approach can reduce the number of mediastinoscopies.

A total of 113 patients with enlarged mediastinal lymph nodes (1 cm), who underwent both TBNA and PET scanning, were included. In 51 patients, histopathology, confirmed by surgical lymph node dissection, was compared with PET results and TBNA.

Sensitivity, specificity, positive predictive value, negative predictive value and accuracy to detect malignant lymphadenopathy was 68 (13/19), 89 (119/134), 46 (13/28), 95 (119/125) and 86% (132/152) for PET, respectively; 54% (6/11), 100 (53/53), 100 (6/6), 91 (53/58) and 92% (59/64), respectively for TBNA; and 100 (11/11), 94 (50/53), 79 (11/14), 100 (50/50) and 95 (61/64) for combined TBNA and PET, respectively.

Combination of transbronchial needle aspiration and positron emission tomography has the potential to allow adequate mediastinal staging of nonsmall cell lung cancer with enlarged lymph nodes in most patients without the need for mediastinoscopy.

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