Fast Five Quiz: Acute Infantile Spinal Muscular Atrophy Type 1, or Werdnig-Hoffmann Disease

Stephen L. Nelson, Jr, MD, PhD

Disclosures

August 12, 2020

The genetic disorder known as spinal muscular atrophy (SMA) manifests as skeletal muscle weakness and atrophy that progresses to paralysis, including paralysis of the respiratory muscles. Several types of SMA exist, but SMA 1, or Werdnig–Hoffmann disease, is the most common. SMA type 1 is a severe form of the disorder that becomes apparent before or shortly after birth. Morbidity and mortality is high in patients with this disorder owing to respiratory failure, but early diagnosis and treatment initiation can improve outcomes.

How much do you know about SMA type 1? Test your knowledge with this quick quiz.

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