CTICasesPrimary endobronchial diffuse large B-cell lymphoma
Imaging findings
Chest radiograph and CT show left upper lobe collapse (with a luftsichel sign) caused by a lobulated endobronchial mass in the left upper lobe bronchus, without a discrete parenchymal mass.
Key takeaways
Diffuse large B-cell lymphoma (DLBCL) can occasionally present as an endobronchial mass causing lobar collapse. It is a rare presentation of pulmonary lymphoma that mimics bronchogenic carcinoma.
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