MACROSCOPIC DESCRIPTION: "Left upper lobe": The specimen consists of left upper lobe 175x115x65 mm. On the pleural surface, there is an area of distortion 37x45 mm. The hilar resection margin is inked blue and the visceral pleura green. The cut surface reveals an irregularly shaped but relatively well circumscribed cream solid nodule abutting the pleura and lying 40 mm away from the bronchial resection margin. The mass measures 35x25x32 mm. The remainder of the lung is homogeneous tan without further lesions.
MICROSCOPIC DESCRIPTION: Sections of the lung show features of a moderately differentiated adenocarcinoma. The total tumour size is 35mm with the invasive component measuring 30 mm and the lepidic component 5 mm (in-situ, non-mucinous type). The invasive tumour forms acinar structures (100%). The tumour cells have enlarged nuclei, prominent nucleoli and moderate amounts of eosinophilic cytoplasm. The tumour extends close to but not through the elastic layer of the visceral pleura. No evidence of lymphovascular invasion is seen. The tumour is completely excised. The bronchial and vascular margins are clear. 2 normal hilar lymph nodes are present. The remaining lung parenchyma is unremarkable.