Hereditary motor and sensory neuropathy type 6

What it is

A rare axonal hereditary motor and sensory neuropathy disease characterized by progressive, peripheral, axonal sensorimotor neuropathy (of variable severity), affecting predominantly the distal lower limbs, associated with progressive, variably severe, optic atrophy, which frequently leads to visual loss. Patients typically present distal limb muscle weakness and atrophy, hypo/areflexia, foot deformities, poor visual acuity (often with a central scotoma), nystagmus, and reduced peripheral and nocturnal vision. Additional reported manifestations include sensorineural hearing loss, major joint contractures, anosmia, scoliosis/lumbar hyperlordosis, cognitive impairment and vocal cord paresis.

Key facts

Prevalence

<1 / 1 000 000

Age of onset

All ages

Inheritance

Autosomal dominant, Autosomal recessive

Classified as

Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Genes

ICD-10 codes

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references