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Clinical Investigations: SARCOIDOSIS |

The Value of Flexible Transbronchial Needle Aspiration in the Diagnosis of Stage I Sarcoidosis*

Rocco Trisolini; Luigi Lazzari Agli; Alessandra Cancellieri; Venerino Poletti; Carmine Tinelli; Giuseppe Baruzzi; Marco Patelli
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*From the Unit of Thoracic Endoscopy (Drs. Trisolini, Lazzari Agli, and Patelli), Department of Pathology (Drs. Cancellieri and Baruzzi), Maggiore Hospital, Bologna; Department of Thoracic Diseases (Dr. Poletti), Morgagni Hospital, Forlì; and Biometrics Unit (Dr. Tinelli), IRCCS Policlinico S. Matteo, Pavia, Italy.

Correspondence to: Marco Patelli, MD, FCCP, Unit of Thoracic Endoscopy, Maggiore Hospital, Largo Nigrisoli 2, 40133 Bologna, Italy; e-mail: marco.patelli@ausl.bologna.it



Chest. 2003;124(6):2126-2130. doi:10.1378/chest.124.6.2126
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Study objectives: Transbronchial lung biopsy (TBLB) during flexible bronchoscopy (FB) is the recommended procedure for diagnosing sarcoidosis in most cases, although its yield in stage I disease is reported to be not as high as when parenchymal involvement is radiologically evident. We undertook this study to assess the diagnostic value of transbronchial needle aspiration (TBNA) in sarcoidosis presenting with hilar and/or mediastinal lymphadenopathy (stage I).

Design: Retrospective review of bronchoscopy procedures performed over a 6-year period for the diagnostic workup of hilar and/or mediastinal lymphadenopathy, as detected by chest radiographs.

Setting: Urban academic hospital.

Patients: Fifty-five patients with hilar and/or mediastinal lymphadenopathy without pulmonary abnormalities were included in the analysis.

Interventions: After chest CT and physical examinations, all patients underwent FB with TBNA. Patients thought to have clinicoradiologic findings highly consistent with sarcoidosis, as assessed by the bronchoscopists performing the procedures, underwent combined TBNA and TBLB.

Results: A diagnosis of sarcoidosis was established in 32 patients. In the remaining 23 patients, other diseases were pathologically diagnosed. Overall, TBNA was diagnostic in 23 of 32 patients with sarcoidosis (72%) by showing nonnecrotizing granulomas in 28 of 39 lymph node stations sampled (72%). Among the 15 patients who were submitted to both TBNA and TBLB, TBNA exclusively established the diagnosis in 7 of 15 patients (47% increase in the diagnostic rate) and its yield exceeded that of TBLB (11 of 15 patients [73%] vs 6 of 15 patients [40%], respectively). The association of TBNA and TBLB increased the diagnostic yield to 87%.

Conclusions: TBNA may be of great value in the diagnostic evaluation of patients with suspected stage I sarcoidosis, and its use in association with TBLB should be strongly encouraged. TBNA may also preclude the need for further surgical diagnostic procedures in several patients with hilar and/or mediastinal adenopathy due to causes other than sarcoidosis.

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