Cerebral palsy masking spinal muscular atrophy.

Spinal muscular atrophy (SMA) is an autosomal recessive anterior horn cell disease that results in progressive muscular weakness and atrophy without sensory involvement. A wide clinical spectrum that ranges from early death to essentially normal adult live exists. We describe a case of two 12 years olds, who represent two of three surviving non-identical quadruplets, born at 25 weeks gestational age.