期刊
FRONTIERS IN MEDICINE
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmed.2021.807017
关键词
secondary membranous nephropathy; cobalamin C disease; MMACHC; methylmalonic academia; hydroxylcobalamin
Membranous nephropathy secondary to cobalamin C disease can be reversed with timely intervention, as demonstrated in this case report.
BackgroundMutation of MMACHC causes inherited cobalamin C disease with methylmalonic academia (MMA) and homocysteinemia. Renal complications may also be present in patients with this deficiency. However, membranous nephropathy secondary to cobalamin C disease has not been reported to date. Case PresentationWe encountered a 17-year-old female patient with a trans-compound mutation of MMACHC who presented with membranous nephropathy, MMA, homocysteinemia, and hyperuricemia. The mutations of c.80A>G (chr1:45966084) and c.482G>A (chr1:45974520) (predicting p.Gln27Arg and p.Arg161Gln missense changes at the amino acid level) had been inherited from her father and mother, respectively. Hydroxocobalamin, betaine, and L-carnitine were administered. The patient achieved complete remission of the membranous nephropathy and resolution of the MMA, homocysteinemia, and hyperuricemia. ConclusionMembranous nephropathy secondary to cobalamin C disease is reversible with timely intervention.
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