CTICasesBronchial Carcinoid
Imaging findings
Lateral chest radiograph demonstrates a subtle rounded opacity located posteroinferior to the hilum, behind the major fissure, which is invisible on the frontal view. Chest CT and bronchoscopy reveal a bronchial carcinoid with a characteristic endobronchial component and a larger extra-bronchial portion (the iceberg sign), resulting in post-obstructive mucus impaction within the distal bronchial tree.
Key takeaways
Bronchial carcinoids are slow-growing neuroendocrine tumors that often present with an endobronchial component causing post-obstructive changes such as atelectasis, recurrent pneumonia, or mucus plugging. On radiography, they may present as subtle nodules or retrohilar opacities only visible on the lateral projection.
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