Question

multiple choice question required which of the following is the most common radiographic finding in post - primary (reactivation) pulmonary tb? please select your answer... a lower lobe consolidation with effusion b diffuse miliary nodules < 1 mm c rounded opacity in the middle lobe d upper lobe cavitary lesion

Explanation:

Post - primary (reactivation) pulmonary TB typically affects the upper lobes due to higher oxygen tension which promotes bacterial growth. Cavitary lesions are a common manifestation as the immune response leads to caseous necrosis and subsequent cavity formation. Lower lobe consolidation with effusion (A) is more common in other infections like pneumonia. Diffuse miliary nodules <1mm (B) are seen in miliary TB which is a hematogenous spread form rather than reactivation. Rounded opacity in the middle lobe (C) is not the typical finding for post - primary pulmonary TB.

Answer:

D. Upper lobe cavitary lesion