Adult-onset spinal muscular atrophy in a patient with SOD1 mutation: case report

Abstract

Amyotrophic lateral sclerosis (ALS) and spinal muscular atrophy (SMA) are distinct motor neuron disorders with overlapping molecular mechanisms. ALS involves progressive upper and lower motor neuron degeneration, while SMA primarily affects lower motor neurons. Mutations in SOD1 (superoxide dismutase 1), a well-established cause of familial ALS, have been identified in patients with atypical motor neuron disease phenotypes, suggestive of their broader role in motor neuron dysfunction.