What was the postoperative diagnosis for the patient with a right middle lobe tumor and left supraclavicular lymph node suspicion?

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When a resected lung tumor is accompanied by a suspicion of spread to a distant lymph node, the final postoperative diagnosis should reflect both the primary cancer and its metastatic involvement. In this scenario, the right middle lobe contains a malignant tumor, and the left supraclavicular lymph node shows involvement consistent with metastatic spread from that lung cancer. Thus, the best diagnosis is a malignant neoplasm of the middle lobe lung with metastasis to the left supraclavicular lymph node.

This fits because the presence of malignant cells in the node that match the lung tumor indicates spread beyond the primary site. A benign pulmonary nodule wouldn’t explain nodal metastasis. An infectious granuloma would show granulomatous inflammation rather than cancer cells. Primary lymphadenopathy without lung cancer wouldn’t account for a lung tumor being present.