title: Left mainstem bronchus narrowing in an asthmatic patient.
mesh_terms: D001249:Asthma / Q000150:complications*; D001982:Bronchial Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D001995:Bronchography; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging / Q000209:etiology; D005260:Female; D006801:Humans; D008875:Middle Aged