Bronchial carcinoid tumor presenting with complete lobar collapse and unilateral lung emphysema

Bronchial carcinoid tumors have different radiographic manifestations. This is a presentation of a case of bronchial carcinoid tumor which presented with complete right upper lobe collapse and emphysematous change of the right residual lung. According to bronchoscopic and operative findings, the emphysematous change of the right residual lung was contributed by a check-valve effect of the endobronchial tumor of the right main bronchus and a compensatory effect of the right residual lung post complete collapse of the right upper lobe.