A 65-year-old man with abnormal CXR

Bronchoscopic finding, left lower lobe, posterobasal segment

Luminal narrowing with mucosal nodularity

© Joungho Han, Copyrighted material

Bronchoscopic biopsy: Cellular blue tumor with extensive necrosis

Necrosis

© Joungho Han, Copyrighted material

Small cell carcinoma

• Round, oval and spindle-shaped small tumor cells with scant cytoplasm

• Ill-defined cell borders• Finely granular nuclear chromatin• Absent or inconspicuous nucleoli• Prominent nuclear molding• Extensive necrosis• High mitotic count

© Joungho Han, Copyrighted material

© Joungho Han, Copyrighted material

© Joungho Han, Copyrighted material