CTICasesEndobronchial Carcinoid Tumor with Post-Obstructive Air Trapping
Imaging findings
Chest CT demonstrates a large, avidly enhancing, rounded soft-tissue mass in the right bronchus exhibiting the "tip of the iceberg" sign, where a small endobronchial component is surrounded by intraluminal air while the primary tumor mass is extraluminal. Post-obstructive air trapping and retained secretions in adjacent airways are also present.
Key takeaways
Bronchial carcinoids are highly vascular neuroendocrine tumors that characteristically show robust enhancement on contrast-enhanced CT. They often demonstrate the "tip of the iceberg" sign and cause post-obstructive sequelae such as atelectasis, mucus plugging, and localized air trapping due to expiratory airway compression.
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