%0 Case Reports %T Renal Involvement in IPEX Syndrome With a Novel Mutation of FOXP3: A Case Report. %A Ke R %A Zhu Y %A Deng F %A Xu D %J Front Genet %V 12 %N 0 %D 2021 %M 35186001 %F 4.772 %R 10.3389/fgene.2021.752775 %X The immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome is a rare genetic disease characterized by multiple immune disorders. Different mutations of the FOXP3 gene may lead to distinct clinical manifestations. Here, we present a rare case of IPEX syndrome caused by a novel variant of FOXP3. Clinical manifestations include autoimmune hemolysis, bronchiectasis, diarrhea, and proteinuria but without diabetes or other endocrine disorders. The diagnosis of IPEX syndrome was confirmed by whole-exon sequencing. Supportive treatment did not ameliorate the patient's symptoms, while immunosuppressive therapy showed a promising efficacy. The patient we reported will improve the understanding of renal manifestations in IPEX syndrome.