Glycogen storage disease type 3
- Forbes disease
- Cori disease
- Limit dextrinosis
- Amylo-1,6-glucosidase deficiency
- Glycogen debrancher deficiency
GSD types IIIa and IIIc typically affect both the liver and muscles, while types IIIb and IIId typically affect only the liver. Individuals with type IIIa may develop myopathy in both the heart and skeletal muscles later in life. The first signs and symptoms of this are typically poor muscle tone (hypotonia) and mild myopathy in early childhood. The myopathy may become severe by early to mid-adulthood.
The Human Phenotype Ontology provides the following list of signs and symptoms for Glycogen storage disease type 3. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms.
The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature.
The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined.
Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
- Glycogen storage disease type III. Genetics Home Reference. September 2010; http://ghr.nlm.nih.gov/condition/glycogen-storage-disease-type-iii. Accessed 2/13/2012.
- Roseline Froissart. Glycogen debranching enzyme deficiency. Orphanet. September 2009; http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=366. Accessed 2/13/2012.
- Forbes Disease. NORD. October 12, 2007; http://www.rarediseases.org/rare-disease-information/rare-diseases/byID/396/viewAbstract. Accessed 2/13/2012.