LAUSR

A 43-year-old woman with a history of asthma presented to our hospital with dyspnea. A laboratory examination revealed peripheral eosinophilia (1,605/μL) and hyperimmunoglobulinemia E (2,609 mg/dL). Computed tomography revealed high-attenuation mucus in the right hilar area (Picture A). On bronchoscopy, a large mucus plug in the truncus intermedius was noted (Picture B). We initially failed to remove the mucus via suction due to its high viscosity; however, removal was ultimately successful using a cryoprobe (1.9 mm) with 1 freezing cycle lasting 6 seconds (Picture C). Aspergillus fumigatus was found in the frozen sample (Picture D), prompting a diagnosis of allergic bron-