CTICasesEndobronchial Carcinoid at the Right Main Stem Bronchus Origin
Imaging findings
CT in a pregnant woman with hemoptysis demonstrates a hypervascular endoluminal mass at the distal trachea or right main stem bronchus origin, with prominent enhancement on arterial-phase imaging. Bronchoscopy confirmed the lesion arose from the right main stem bronchus rather than the trachea. Pathology confirmed a bronchial carcinoid tumor.
Key takeaways
Bronchial carcinoid tumors arise almost exclusively from the lobar and segmental bronchi. They are intensely hypervascular on contrast CT and can present with hemoptysis. Tracheal carcinoids are extremely rare. Proximal right main stem bronchus carcinoids at the carina are uncommon but important to recognize on CT as the airway anatomy may be subtle and the tumor may be confused with a primary tracheal neoplasm. Pregnancy-associated carcinoids may demonstrate growth acceleration.
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