biostudies-literatureWritzl Kthe Republic of Slovenia Research Agency1077https://www.ebi.ac.uk/biostudies/studies/S-EPMC12469850biostudies-literatureUnknown16(9)Background: Pathogenic hemizygous variants in ATP7A most commonly cause Menkes disease or occipital horn syndrome (OHS), whereas ATP7A-related distal hereditary motor neuropathy (dHMN) is rarely reported. Here, we describe two adult brothers with an overlapping dHMN/OHS phenotype caused by a novel ATP7A splice-site variant and review the clinical and genetic features of previously published patients with ATP7A-related dHMN. Methods: We performed detailed clinical, electrophysiological, and genetic evaluations of both siblings, including exome sequencing and RNA analysis. Additionally, we reviewed the clinical, electrophysiological, and genetic data of previously reported patients with ATP7A-related dHMN. Results: We identified a novelGenesNovel ATP7A Splice-Site Variant Causing Distal Motor Neuropathy and Occipital Horn Syndrome: Two Siblings and Literature Review.PMC12469850No. P3-0338, J3-9280, V3-2359 and P3-0326.Leonardis LSkrjanec Pusenjak MMaver AWritzl KPecaric Meglic NPeterlin BJus MfalseNovel ATP7A Splice-Site Variant Causing Distal Motor Neuropathy and Occipital Horn Syndrome: Two Siblings and Literature Review.Background: Pathogenic hemizygous variants in ATP7A most commonly cause Menkes disease or occipital horn syndrome (OHS), whereas ATP7A-related distal hereditary motor neuropathy (dHMN) is rarely reported. Here, we describe two adult brothers with an overlapping dHMN/OHS phenotype caused by a novel ATP7A splice-site variant and review the clinical and genetic features of previously published patients with ATP7A-related dHMN. Methods: We performed detailed clinical, electrophysiological, and genetic evaluations of both siblings, including exome sequencing and RNA analysis. Additionally, we reviewed the clinical, electrophysiological, and genetic data of previously reported patients with ATP7A-related dHMN. Results: We identified a novel2025-01-01T00:00:00Z2025 Sep2026-05-03T03:16:47.901Z2026-05-03T03:11:27.333ZS-EPMC124698504101002210.3390/genes16091077