“…Except for the relatively low incidence, the characteristics of PFE in the present study showed rather different features as compared with those reported previously in some respects 2,3,7,8 . Although it has been known PFE resembles an allergic inflammatory response and peritoneal hypersensitivity to some allergens are responsible for the pathogenesis of PFE, 3,15–20 there were no significant differences in the factors known as possible allergens between patients with PFE and those without in the present study. In addition, the occurrence of PBE did not differ between patients with PFE and those without.…”