Development of eosinophilic pneumonia from eosinophilic bronchiolitis without asthma: A case report

• DOI: 10.1016/j.rmcr.2023.101901
• Publication Date: 2023-07-23T17:33:31Z
• Authors: Erika Mikami; Kenichiro Atsumi; Hirokazu Iso; Takahiro Suzuki; Satoru Matsuki; Kakeru Hisakane; Koji Nagata; Masahiro Seike; Takashi Hirose
• Keywords: Diseases of the respiratory system; Hypereosinophilic obliterative bronchiolitis; RC705-779; Eosinophilic pneumonia; Eosinophilic bronchiolitis; Case Report; Bronchial asthma

Eosinophilic bronchiolitis is a disease concept reported in Japan in 2001, that presents with bronchiolitis accompanied by eosinophilia in the blood and lungs. In 2013, hypereosinophilic obliterative bronchiolitis, as a group of disease presenting with eosinophilic bronchiolitis, was proposed in France. The relationship between eosinophilic bronchiolitis and other eosinophil-related diseases has not been clarified. Herein, we report the case of a 56-year-old female patient with eosinophilic bronchiolitis without asthma, which developed into eosinophilic pneumonia. Treatment with oral prednisone improved the respiratory function. According to the clinicopathological findings in this case, eosinophilic bronchiolitis may be a different disease from asthma.