cherry-red spot myoclonus syndrome

n.
  1. Either of two types of neuronal storage disorders in children characterized by a cherry-red spot at the macula, progressive myoclonus, and easily controlled seizures, and resulting from a deficiency of sialidase.sialidosis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.