A 48-year-old man developed episodic non pitting edema and eosinophili
a. Symptoms were alleviated promptly when treated with prednisolone. H
owever, major basic protein (MBP), eosinophil cationic protein (ECP),
and eosinophil-derived neurotoxin (EDN) levels in the serum as well as
the total number of eosinophils remained high. During periods of atta
ck serum levels of interleukin-5 (IL-5) were elevated, but the levels
were lowered following treatment, suggesting that IL-5 is involved in
periodic angioedema with eosinophilia.