CTICasesTypical carcinoid
Imaging findings
Chest radiograph shows left upper lobe volume loss and elevation of the left hilum with preservation of the left heart border. CT chest confirms left upper lobe segmental atelectasis with sparing of the lingula, caused by a small, obstructing endobronchial carcinoid tumor in the left upper lobe bronchus.
Key takeaways
In cases of left upper lobe bronchial obstruction sparing the lingula, the left heart border remains sharp and preserved, which is a key radiographic clue to partial collapse, often caused by indolent neuroendocrine tumors like carcinoids.
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