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Abstract
Early CT findings of transient radiographic progression (TRP) during treatment of active pulmonary tuberculosis including subpleural, interlobular or intralobular septal thickening and micronodules are shown in the present case. Late CT findings of TRP are subpleural, enhancing nodular infiltration with internal low attenuation. These CT features accompanied by a lack of clinical worsening in young patients taking antituberculous medication due to pulmonary tuberculosis can help to differentiate TRP from other disease entities.
Figures and Tables
Figure 1
(A) HRCT scan at the level of the aortic arch vessels shows focal centrilobular nodules (arrow) and lobular consolidation (arrowhead) in the posterior segment of right upper lobe. (B) HRCT scan at the same level with Figure 1A obtained two weeks later shows marked improvement of patchy infiltrate in the posterior segment of right upper lobe. (C) HRCT image obtained at the level of bronchus intermedius shows new subpleural micronodules (arrowhead) and interlobular septal thickening (arrow) in the subpleural portion of the anterior segment of right upper lobe. (D) HRCT image obtained at the level of left ventricle shows subpleural nodules (arrowhead), interlobular, and intralobular septal thickening (arrows) in the subpleural portion of the right middle lobe.
Figure 2
(A) CT scan after intravenous contrast administration at the level of the bronchus intermedius shows an enhancing subpleural nodule (arrowheads) with internal low attenuation in the anterior segment of right upper lobe. (B) CT scan after intravenous contrast administration at the level of left ventricle shows an enhancing subpleural nodule (arrows) with pleural thickening and internal low attenuation (arrowheads).
References
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