Fig. 3

Pathological findings. a The macroscopic findings of right apical lesion. b The area of enlargement is indicated by the yellow square (a). The right upper lobe lesion included minute bleeding in the solid component around the cyst (yellow arrowheads). c Macroscopic findings of the right lateral basal segment lesion revealed no evidence of bleeding. d Microscopic findings revealed tangled spindle-shaped cells with little atypia and no tumor necrosis (original magnification ×200)