From OMIM
Autosomal recessive spastic paraplegia-35 (SPG35) is a complicated form of SPG characterized by childhood onset of gait difficulties due to progressive spastic paraparesis, dysarthria, and mild cognitive decline associated with leukodystrophy on brain imaging. Other variable neurologic features, such as dystonia, optic atrophy, and seizures may also occur (summary by Dick et al., 2010). In addition, some patients with mutations in the FA2H gene have radiographic evidence of neurodegeneration with brain iron accumulation (NBIA), thus expanding the phenotype. Kruer et al. (2010) referred to this phenotypic spectrum of disorders as fatty acid hydrolase-associated neurodegeneration (FAHN). In a detailed report of 19 patients with biallelic FA2H mutations, Rattay et al. (2019) stated that the phenotype was diagnostically consistent with a complicated form of SPG. The authors concluded that FA2H mutations cause a narrow phenotype despite prior attempts to classify it into separately defined disease entities. For a discussion of genetic heterogeneity of autosomal recessive spastic paraplegia, see SPG5A (270800).  http://www.omim.org/entry/612319