Fig. 1

Thorax CT manifestations of OP cases. a, b OP presenting as a bulky consolidated mass with coarse margins and moderate enhancement in left upper lobe with hilum and mediastinal lymphadenectasis. c OP presenting as a mass-like lesion with coarse margins and pleural indentation, and low-density air is noted in the central in the right lower lobe. d OP presenting as a predominantly ground glass opacity, air bronchogram and pleural indentation in the right lower lobe