A 54-year-old male, heavy smoker, presented with a six-week history of fever, anorexia, worsening cough, and dyspnoea. He had previously undergone coronary artery bypass grafting. A chest radiograph showed previous sternotomy, borderline cardiomegaly, pulmonary oedema, right lower zone consolidation, and a right mid zone oval density.

What is the diagnosis for this oval density? *This case is from Docplexus editorial team for educative purpose only  Source: BMJ The answer is posted in the comment section. ( Click here )