MCQ – 88342


72. A 60-year-old man presents with a chronic history of persistent cough, chest pain, and recurrent pneumonia. He denies smoking or consuming alcohol. The patient subsequently dies of sepsis. Autopsy reveals malignant cells that diffusely infiltrate the lung parenchyma. Histopathologic examination of the lung shows well-differentiated, mucus-producing,columnar neoplastic cells lining the alveolar spaces as shown in the image. Neoplastic cells are not found in any other organ. What is the most likely diagnosis?


Bronchioloalveolar carcinoma


Carcinoid tumor


Large cell carcinoma


Small cell carcinoma

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