<prompt> Cavitation of the lungs is not a feature of: March 2011Lung abscessPrimary pulmonary tuberculosisSecondary pulmonary tuberculosisBronchogenic carcinoma  <response>: Ans. B: Primary pulmonary tuberculosis Cavitation is rare in primary TB Radiological changes of secondary TB includes ill-defined opacification in one or both of the upper lobes, and as progression occurs, consolidation, collapse and cavitation develop to a varying degree Cavitation in lungs can be seen in C- Carcinoma - Squamous is most common A- Autoimmune - Wegeners granulomatosis, Rheumatoid nodules V- Vascular - Emboli septic emboli or bland emboli I- Infection - Lung abscess, Bacterial pneumonia, Fungal pneumonia, Tuberculosis secondary, Pneumatocele T- Trauma - Pulmonary laceration Y- Young congenital - Congenital cystic adenomatoid malformation, Pulmonary sequestration, Bronchogenic cyst 