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A new disease profile is added to our database – spinal muscular atrophy (SMA). Spinal muscular atrophy genetic disorder with autosome-recessive inheriting. This disease is characterized by progressive muscle weakness resulting from the degeneration and loss of the motor neurons in the spinal cord. The frequency of SMA is 1/10 000 births for type I and 1/24 000 births for type II and III. The profile was written by our consultant Dr. Ralitza Jordanova.