Which clinical history findings are characteristic of spinal muscular atrophy (SMA) type IV?

Updated: Apr 28, 2014
  • Author: Hidehiro Takei, MD; Chief Editor: Adekunle M Adesina, MD, PhD  more...
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Answer

Answer

Type IV SMA

Type IV is an adult-onset type (age > 30 y) and represents the mildest form within the spectrum of SMA phenotypes. Patients present with pronounced proximal weakness, and the clinical picture is very similar to that of a limb-girdle muscular atrophy.


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