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°áÇÙ¼º È丷»ïÃâÁõ°ú ¾Ç¼º È丷»ïÃâÁõÀÇ °¨º°Áø´Ü : CTÀÇ Áø´ÜÁ¤È®µµ¿Í ¼Ò°ß Differential Diagnosis of Tuberculous Pleural Effusion and Malignant Pleural Effusion : CT Accuracy and Findings

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Abstract

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#ÃÊ·Ï#
Purpose : To evaluate the diagnostic accuracy of CT in the differential diagnosis of
tuberculous and malignant pleural effusion whether or not lung lesions are present, and
to investigate the CT findings used for this differential diagnosis.
Materials and Methods : This study involved 30 patients with tuberculous pleural
effusion (mean age, 44.6 years ; M : F=19 : 11) and 20 with malignant pleural effusion
(mean age, 57.2 years ; M : F=10 : 10). All 50 patients underwent enhanced CT chest
scans, and the respective conditions were pathologically confirmed. Two radiologists
unaware of the pathologic results and distribution of patients reviewed these scans
retrospectively and independently. They recorded the presence or absence of helpful lung
lesions, CT findings of pleural effusions, their diagnoses, and the degree of confidence of
their diagnoses .
Results: Among the total of 100 answers, helpful long lesions were found in 57 cases.
Fifty-three of 57 diagnoses(93%) were correct and 26 cases(46%) were diagnosed with a
high degree of confidence. Thirty-two of 43 cases(74%) without helpful lung lesions
were correct and 11(26%) were diagnosed with a high degree of confidence. All
diagnoses made with a high degree of confidence were correct, even in cases without
helpful lung lesions. Frequent CT findings in tuberculous pleural effusion included
diffuse pleural thickening, enhancement of pleura, deposition of extrapleural fat, and
pleural calcification : in malignant pleural effusion, nodular pleural thickening, pleural
thickening over 1cm and associated lymphadenopathy were frequent. Mediastinal and
circumferental pleural, as well as fissural involvement, were seen in both effusions ;
there were no statistical differences.
Conclusion : In most cases, CT provided correct differential diagnosis between
tuberculous and malignant pleural effusion. It can help determine the nature of
associated lung and pleural lesion, and specific findings of the latter, and can accurately
differentiate tuberculous and malignant pleural effusion.

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Pleura; CT; Pleura; infection; Pleura; neoplasms;

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