CTICasesEndobronchial Carcinoid mimicking Atelectasis
Imaging findings
February chest radiograph shows left-sided volume loss, vertically oriented left main bronchus, and stretched vessels. CT confirmed an obstructing endobronchial carcinoid in the left lower lobe bronchus.
Key takeaways
Obstructing endobronchial lesions can cause subtle, chronic lobar atelectasis. Radiologists must recognize the direct and indirect signs of lobar collapse (hilar displacement, bronchial deviation, and vessel stretching) to avoid delaying diagnosis.
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