Proximal spinal muscular atrophy

What it means

Proximal spinal muscular atrophy, i.e., muscular weakness and atrophy related to loss of the motor neurons of the spinal cord and brainstem.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category