Genetic skeletal muscle disease Glycogen storage disease due to glycogenin deficiency Glycogen storage disease type XV OMIM:613507 Glycogen storage disease type 15 GSD type XV ICD10:E74.0 GSD due to glycogenin deficiency orphanet GSD type 15 Glycogenosis due to glycogenin deficiency Glycogenosis type 15 Glycogen storage disease type 15 is an extremely rare genetic glycogen storage disease reported in one patient to date. Clinical signs included muscle weakness, cardiac arrhythmia associated with accumulation of abnormal storage material in the heart and glycogen depletion in skeletal muscle. Glycogenosis type XV Disorder of carbohydrate metabolism