PROBLEM TO BE SOLVED : To provide novel therapeutic treatment methods for treating nasal polyposis.SOLUTION : A method for treating nasal polyposis comprises administering to a subject in need thereof a pharmaceutical composition comprising an antibody or antigen binding fragment thereof that specifically binds an interleukin-4 receptor (IL-4R), where the antibody or antigen binding fragment thereof comprises heavy chain and light chain CDR sequences from the heavy chain variable region (HCVR) and light chain variable region (LCVR) sequence pair.SELECTED DRAWING : NoneCOPYRIGHT : (C)2019, JPO&INPIT