The term 'Spinal muscular atrophy with lower extremity predominance' keeps coming up in medical discussions. What does it stand for?
Spinal muscular atrophy with lower extremity predominance, sometimes called lower extremity-predominant spinal muscular atrophy, may refer to:

Spinal muscular atrophy with lower extremity predominance 1
Spinal muscular atrophy with lower extremity predominance 2A
Spinal muscular atrophy with lower extremity predominance 2B

See also
Spinal muscular atrophies