PATHOLOGY REPORT

MICROSCOPIC DESCRIPTION: 1. One lymph node is identified with no evidence of tumor. 2. Sections of the lung show features of a moderately differentiated adenocarcinoma. The tumor forms acinar (50%) and papillary structures (50%). The tumor cells have enlarged nuclei, prominent nucleoli and moderate amounts of eosinophilic cytoplasm. The tumor does not involve the visceral pleura. No evidence of lymphovascular invasion is seen. The tumor is completely excised. The bronchial and vascular margins are clear. One normal intraparenchymal lymph node is present. The remaining lung parenchyma is unremarkable. The tumor cells are CK7 and TTF-1 positive. CK20 is negative. 3. One lymph node is identified with no evidence of tumor. 4. Three lymph nodes are identified with no evidence of tumor.

DIAGNOSIS: 1. Intersegmental frozen: One lymph node identified with no evidence of tumor. 2. Post basal segment right lower lobe: Moderately differentiated adenocarcinoma. 20mm in maximum dimension. No evidence of pleural invasion. No evidence of lymphovascular invasion. Bronchial resection margin uninvolved. Tumor completely excised with clear parenchymal margin. One normal intraparenchymal lymph node identified. 3. Intersegmental lymph node: One lymph node identified with no evidence of tumor. 4. Station 8: Three lymph nodes identified with no evidence of tumor.