Bronchoscopy: A smooth, polypoid mass partially obstructed the lumen of the main upper lobe bronchus at its junction with the lingular bronchus. A creamy exudate surrounded the mass. Because of the possibility of bleeding (the patient was on anticoagulants), it was not biopsied.

The differential diagnosis of this lesion includes: Answer

Clinical summary Radiology Image 1

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Answer: Malignant lesions--bronchogenic carcinoma, carcinoid tumor, mucoepidermoid carcinoma, metastatic tumor (renal cell carcinoma).

Benign lesions--hamartoma, papilloma, granular cell tumor, leiomyoma, lipoma

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