Histology:
MICROSCOPIC DESCRIPTION: 1. The smears and cell block section contain scattered cohesive groups of malignant epithelial cells. The tumour cells have enlarged hyperchromatic nuclei, granular chromatin, inconspicuous nucleoli, nuclear moulding and scanty cytoplasm. Apoptotic debris, necrosis and some mitoses are present in the background. The tumour cells are synaptophysin, CD56 and TTF-1 positive. The features are those of small cell carcinoma.
DIAGNOSIS: 1. TBNA Right Hilar Mass: Small cell carcinoma.