Valor diagnóstico da punção-biópsia pleural: experiência em um serviço de clínica médica

The diagnosis of pleural tuberculosis (pTB) is difficult, and more sensitive and specific techniques are needed. In the period August 1998 to November 2002, we evaluated 132 patients with a pleural effusion submitted to a thoracentesis and pleural biopsy in a tertiary care hospital in Rio de Janeiro, Brazil. Three tests were performed and compared in the pleural fluid: ADA activity measurement, IgA-ELISA for two combined specific Mycobacterium tuberculosis antigens, and polymerase chain reaction (PCR) for detection of M. tuberculosis DNA. Ninety-five patients (72%) were given a final diagnosis of pTB. Overall histopathologic sensitivity was 77%. The sensitivities of pleural fluid culture and AFB smear were 42% and 1%, respectively. Twenty-one (22%) additional patients had a clinical diagnosis of pTB. Median follow-up time of all TB patients after the completion of antituberculous treatment was 13 months. Sensitivities of ADA, IgA-ELISA and PCR were 91%, 78% and 82%, while specificities were 93%, 96% and 85%, respectively. Only ADA sensitivity was significantly higher than the histopathologic examination (McNemar chi2 test; p = 0.002) and also significantly higher than ELISA (p = 0.049), but not higher than PCR (p = 0.143). We conclude that the routine use of ADA activity measurement in pleural fluid can obviate the need for a pleural biopsy in the initial diagnostic approach to pleural effusions, while IgA-ELISA and PCR techniques, potentially more specific tests, need further refinement to improve their accuracy.

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Pleural fluid ADA, IgA‐ELISA and PCR sensitivities for the diagnosis of pleural tuberculosis

Trajman

Kaisermann

Luiz

et al. 2007

Scandinavian Journal of Clinical and Laboratory Investigation

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Valor diagnóstico da punção-biópsia pleural: experiência em um serviço de clínica médica

Abstract: Objetivo: Avaliar o valor da punção-biópsia pleural no diagnóstico das doenças inflamatórias da pleura. Métodos: Foi feito um estudo retrospectivo de 82 toracocenteses realizadas durante um período de 42 meses em uma enfermaria de clínica médica no Rio de Janeiro.

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Pleural fluid ADA, IgA‐ELISA and PCR sensitivities for the diagnosis of pleural tuberculosis

Pleural fluid ADA, IgA‐ELISA and PCR sensitivities for the diagnosis of pleural tuberculosis

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