DNAJB2-related Charcot-Marie-Tooth disease type 2

What it is

A rare autosomal recessive axonal hereditary motor and sensory neuropathy characterized by adolescent or adult onset of slowly progressive muscle weakness and atrophy of the distal lower limbs progressing to involve also the upper limbs and proximal muscles, and sensory impairment. Patients present gait disturbances and loss of reflexes, at later stages loss of ambulation, dysarthria, dysphagia, facial weakness, and impairment of respiratory muscles requiring assisted ventilation.

Key facts

Prevalence

<1 / 1 000 000

Age of onset

Adult

Inheritance

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.

Gene

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