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SMA Syndrome: Symptoms, Causes, Treatment, and Outlook Superior mesenteric artery syndrome is a rare type of compression of the small intestine It’s a treatable condition, but a delayed diagnosis can lead to more severe symptoms or even death
Spinal Muscular Atrophy - National Institute of Neurological . . . Spinal muscular atrophy (SMA) refers to a group of hereditary diseases which affect motor neurons Motor neurons are specialized nerve cells in the brain and spinal cord that control movement in the arms, legs, face, chest, throat, and tongue, as well as skeletal muscle activity, including muscles used for speaking, walking, swallowing, and breathing
Spinal Muscular Atrophy - SMA | MedlinePlus It usually causes symptoms after 21 years of age The symptoms include mild to moderate leg muscle weakness, tremors, and mild breathing problems The symptoms slowly get worse over time People with this type of SMA have a normal lifespan What causes spinal muscular atrophy (SMA)? Most types of SMA are caused by a change in the SMN1 gene