Subject(s)
Amyloidosis, Familial/genetics , Genes, Recessive , Inheritance Patterns , Skin Diseases, Genetic/genetics , Humans , Male , Middle Aged , Pedigree , Siblings , ThailandABSTRACT
OBJECTIVES: To evaluate the diagnostic use of pleural fluid adenosine deaminase (ADAPF) levels in tuberculous pleuritis (TBpl), with a special reference to HIV coinfection and a Bayesian analysis. METHODS: We investigated a total of 216 patients with pleural effusion, including 100 with TBpl, 68 with malignant effusion, 6 with transudates, 19 with empyema, 15 with miscellaneous diseases, and 8 with diseases of unknown etiology. RESULTS: The mean values (SE) of ADAPF were 110 (4.5) U/L in patients with TBpl vs 28 (5.3) U/L in patients with a malignancy, 18 (5.7) U/L in patients with transudates, 13 (2.1) U/L in patients with diseases of unknown etiology, 22 (5.1) U/L in patients with miscellaneous diseases, and 191 (26.3) U/L in patients with empyema (Kruskal-Wallis test, p < 0.001). The ADAPF level was 110 (4.5) U/L in 37 HIV-positive patients with TBpl vs 114 (4.1) U/L in 52 HIV-negative patients with TBpl (Mann-Whitney U test, p > 0.05). A receiver operating characteristic curve identified the best cutoff at 60 U/L, yielding measures for sensitivity (0.95), specificity (0.96), positive predictive values (PPVs; 0.96), and negative predictive values (0.95). A Bayesian analysis showed a posttest probability of PPV ranging from 0.5 to 0.99, resulting from a pretest probability of 0.05 to 0.9. CONCLUSIONS: ADAPF is diagnostically useful across the various prevalences of TBpl, and its best diagnostic utility is in areas of intermediate prevalence of the disease. Moreover, the diagnostic value of ADAPF is independent of HIV serologic status.
Subject(s)
Adenosine Deaminase/analysis , HIV Infections/epidemiology , Pleural Effusion/chemistry , Tuberculosis, Pleural/diagnosis , Adult , Bayes Theorem , Comorbidity , Female , Humans , Lung Diseases/epidemiology , Male , Pleural Effusion, Malignant/chemistry , Predictive Value of Tests , Prevalence , Prospective Studies , ROC Curve , Sensitivity and Specificity , Tuberculosis, Pleural/epidemiologyABSTRACT
This prospective study examined the etiology of eosinophilic pleural effusions investigated at a Thai thoracic center from January 1996 to February 1998. Among the 405 eligible pleural effusions, 31 were eosinophilic (EoPF) and 374 were noneosinophilic (NEoPF). Malignant effusions were established in 159 of the 405 patients, yielding a prevalence of 0.39. Malignant effusions were responsible in 24 of the 31 EoPF (77.4%), and 135 of the 374 NEoPF (36%)(p = 0.01). Bayesian analysis showed the post-test probability of malignancy in eosinophilic pleural effusions among our patient population to be 0.76. Tuberculous pleuritis was the etiology in 155 patients with NEoPF (41.4%) but in none of the patients with EoPF (p <0.001). There was no significant difference between EoPF and NEoPF in miscellaneous causes including paragonimiasis, amebiasis, lupus pleuritis, chylothorax, and yellow nail syndrome. It is concluded that eosinophilic pleural effusions are at least as likely to be malignant as noneosinophilic effusions. The finding of eosinophilic pleural effusions should not be regarded as suggestive of benign conditions.
