MCQ – 88325

Question

71. A 50-year-old man presents with increasing chest pain, bloody sputum, and weight loss over the past 3 months. A high resolution CT scan reveals a mass circumscribing the right main bronchus, extending into its lumen. Histologic examination of an open-lung biopsy is shown in the image. Electron microscopy shows numerous neuroendocrine granules withintumor cells. What is the appropriate diagnosis?

A.

Adenocarcinoma

B.

Bronchioloalveolar carcinoma

C.

Carcinoid tumor

D.

Squamous cell carcinoma

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