Acute eosinophilic pneumonia in twins

The pathogenesis of eosinophilic pneumonia is currently poorly understood, and this disease has not been reported in twins since 1983. Herein, we report a case of acute eosinophilic pneumonia in twins, which appeared to be triggered by initial smoking at different times by both patients. One patient resumed smoking after recovering from eosinophilic pneumonia, with no observed recurrence. This study discussed the possibility of an association between susceptibility to eosinophilic pneumonia and genetic factors in twins.