ICD-11 classes
08 Diseases of the nervous system
Motor neuron diseases or related disorders
8B61 — Spinal muscular atrophy
8B61.2 — Juvenile form spinal muscular dystrophy, Type III

ICD-11 8B61.2 — Juvenile form spinal muscular dystrophy, Type III

In SMA type 3, weakness of muscles is seen after 18 months of age. The child is able to sit and stand independently. There is a limb girdle-type of distribution of weakness causing waddling gait, falls, and difficulty with running. The ability to walk may be lost, requiring a wheelchair as the disease progresses. The life expectancy may be normal.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.