Neuronopathy, distal hereditary motor, autosomal recessive 11, with spasticity

Autosomal recessive distal hereditary motor neuropathy-11 with spasticity (HMNR11) is characterized by onset of slowly progressive distal muscle weakness and atrophy and spasticity of the lower limbs in the first decade of life. Affected individuals have difficulty walking, although ambulation is retained into adulthood. There is usually upper limb involvement. Some patients have foot deformities. Electrophysiologic studies are consistent with a length-dependent axonal motor neuropathy (Maroofian et al., 2024). For a discussion of genetic heterogeneity of autosomal recessive HMN, see HMNR1 (604320). [from OMIM]