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با سلام بسم الله الرحمن الرحیم. BY ASADOLLAH ASADIAN MD Tuberculous Pleural Effusion.

Dec 29, 2015

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Page 1: با سلام بسم الله الرحمن الرحیم. BY ASADOLLAH ASADIAN MD Tuberculous Pleural Effusion.

سالم با

بسم الله الرحمن الرحیم

Page 2: با سلام بسم الله الرحمن الرحیم. BY ASADOLLAH ASADIAN MD Tuberculous Pleural Effusion.

BY ASADOLLAH ASADIAN MD

Tuberculous Pleural Effusion

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EpidemiologyPleural TB is second most common extrapulmonary TB site behind lymph node involvement

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PathogenesisTB Pleural effusion can be seen in either

primary disease or reactivation diseaseEffusion a result of the rupture of a subpleural

foci of TB into the pleural space that leads to a delayed hypersensitivity reaction to the TB antigens

Tuberculous empyema – same mechanism as above with spillage of large amount of mycobacterium into pleural space purulent effusion that requires surgical intervention and can result in pleural fibrosis and restrictive lung disease

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Clinical Presentationusually presents as an acute illness (1 wk –

1 mo symptoms)presenting symptoms: pleuritic chest pain

and nonproductive coughcommon to have other symptoms of TB –

night sweats, weight loss, dyspneaphysical exam consistent with pleural

effusion – decreased breath sounds, dullness to percussion at site of disease

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paraclinical PresentationCXR – small to moderate sized unilateral

pleural effusionPleural Fluid

-Straw colored appearance-exudative-pH 7.3 – 7.4-glucose usually > 60-Cell count usually 1000 – 6000 with

lymphocytic predominance

Page 12: با سلام بسم الله الرحمن الرحیم. BY ASADOLLAH ASADIAN MD Tuberculous Pleural Effusion.

paraclinical PresentationCXR – small to moderate sized unilateral

pleural effusionPleural Fluid

-Straw colored appearance-exudative-pH 7.3 – 7.4-glucose usually > 60-Cell count usually 1000 – 6000 with

lymphocytic predominance

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CT scan showing a parenchymal focus of tuberculosis close to the pleura and an ipsilateral pleural

effusion. Courtesy of Paul Stark, MD.www.uptodate.com 2008

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Figure 1a. Patient 6.

Choi Y W et al. Radiology 2002;224:493-502

©2002 by Radiological Society of North America

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Figure 1a. Patient 6.

Choi Y W et al. Radiology 2002;224:493-502

©2002 by Radiological Society of North America

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DiagnosisTB skin test

-helpful if +, especially in areas of low prevalence of disease

-oftentimes negative but if repeated 6-8 weeks later usually +

Radiology-CXR with small – moderate sized unilateral effusion and

associated parenchymal lung lesions in 20-50% -CT scan better at documenting parenchymal lung

disease (80% of cases). Also better at delineating TB pleural effusion complications such as pleural thickening, calcification, loculated effusions, empyema, empyema necessitatis, and bronchopleural fistula

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Differential DiagnosisLymphocytic Effusion

TBMalignancyLymphomaCollagen vascular diseasePost coronary artery bypass grafting

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DiagnosisTB skin test

-helpful if +, especially in areas of low prevalence of disease

-oftentimes negative but if repeated 6-8 weeks later usually +

Radiology-CXR with small – moderate sized unilateral effusion and

associated parenchymal lung lesions in 20-50% -CT scan better at documenting parenchymal lung

disease (80% of cases). Also better at delineating TB pleural effusion complications such as pleural thickening, calcification, loculated effusions, empyema, empyema necessitatis, and bronchopleural fistula

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DiagnosisSputum

-can have + M Tuberculosis cultures 20-50% time

-increased yield on sputum cultures with parenchymal lung lesions on radiographs

-should still be pursued in areas where other means of diagnosis not available

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Diagnosis – Pleural FluidMicrobiology

Adenosine Deaminase (ADA)

enzyme in purine salvage pathway that is important in differentiation of lymphoid cells and has increased activity with increased lymphocyte activity

high sensitivity (90-100%)cutoff is 40: >40 supportive of TB, <40 virtually

excludes TBInterferon gamma

produced by t-lymphocytes to activate macrophagesincreased in TB pleural effusion due to increased

numbers of T-lymphocytes presentmore sensitive and specific vs. ADA, but more

expensive and less available so not used as much

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DiagnosisPleural Biopsy

most sensitive testtissue via closed needle biopsy or

thoracoscopyHistology: caseating granulomas (50-97%)Culture for M Tuberculosis + in 40-80%Combo of above two leads to diagnosis in 60

– 95% cases

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Goal of treament

(I ) e thsubseqto prevent uent development of active TB (2 ) to relieve the symptoms of the patient, (3) to prevent the development of a fibrothorax.

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Treatment If left untreated, effusions usually resolve in 4-16

weeks and are followed by development of active pulmonary TB or extrapulmonary TB in 43-65% cases

Antimicrobial therapy is the same as for pulmonary TB 4 drug therapy for 2 months with isoniazid, rifampin,

pyrazinamide, and ethambutol followed by 4 mo of isoniazid and rifampin

Steroids have been studied in TB pleural effusion with no definite benefit. Studies did note earlier resolution of symptoms (fever,

chest pain, dyspnea) in patients treated with steroids, but no difference in the development of pleural thickening, adhesions, or residual lung function.

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