Spinal muscular atrophy: an update.

Spinal muscular atrophy (SMA) is the most common childhood neurodegenerative disease. We report an infant with SMA type 1 and discuss the recent developments in SMA genetics, pathophysiology, and possible treatment options. Because SMA type 1 remains a fatal illness for which there is not yet a cure, the focus of patient care continues to be symptomatic. Thus, the most appropriate aspects of care at present and future are also discussed.