In SMA type 2, muscle weakness is seen between the ages of 6 to 18 months. The child can sit unsupported, but cannot stand or walk independently. Death usually occurs between 2 years of age and young adulthood.
Also indexed as
Intermediate type spinal muscular atrophyLate infantile spinal muscular atrophy, Type IIintermediate type SMA - [spinal muscular atrophy]late infantile SMA - [spinal muscular atrophy], Type IItype 2 SMA - [spinal muscular atrophy]