Improved characterisation of the clinical phenotype of Hereditary Motor Sensory Neuropathy of neuronal type with onset of symptoms in early childhood, especially with respect to disease progression with age and the incidence of such complications as foot deformity, contractures, scoliosis and respiratory involvement - an observational study.

This observational study looks at a group of patients diagnosed with a hereditary motor and sensory nerve disease (HMSN of neuronal type) that starts in early childhood. Researchers want to track how this condition changes over time, and how often complications like foot deformity, joint tightening (contractures), scoliosis (curved spine), and breathing problems occur. You may be eligible if: - You have been diagnosed with HMSN of neuronal type that started in early childhood - Your diagnosis is supported by clinical findings, family history, nerve testing, or, where applicable, biopsy results You may NOT be eligible if: - There are no specific exclusion criteria listed for this study Talk to your doctor about whether this trial might be right for you.