type 5 glycogenosis

n.
  1. Glycogenosis due to a phosphorylase deficiency resulting in the accumulation of glycogen in muscle and characterized by muscle cramping that limits the ability to perform strenuous exercise.McArdle-Schmid-Pearson disease McArdle's disease
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.