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Glycogen storage disease type III





Population genetics
Genetic disorders
Down syndrome (Trisomy 21)
Edwards syndrome (Trisomy 18)
Patau syndrome (Trisomy 13)
Fragile X syndrome
Huntington disease
Myotonic dystrophy
Friedreich ataxia
Turner syndrome
Klinefelter syndrome
Prader-Willi syndrome
Angelman syndrome
Beckwith-Wiedemann syndrome
Cri du chat syndrome
Williams syndrome
Alagille syndrome (NORD)
Polycystic kidney disease
Familial adenomatous polyposis
Familial hypercholesterolemia
Hereditary spherocytosis
Huntington disease
Li-Fraumeni syndrome
Marfan syndrome
Multiple endocrine neoplasia
Myotonic dystrophy
Treacher Collins syndrome
Tuberous sclerosis
von Hippel-Lindau disease
Polycystic kidney disease
Cystic fibrosis
Friedreich ataxia
Gaucher disease (NORD)
Glycogen storage disease type I
Glycogen storage disease type II (NORD)
Glycogen storage disease type III
Glycogen storage disease type IV
Glycogen storage disease type V
Mucopolysaccharide storage disease type 1 (Hurler syndrome) (NORD)
Krabbe disease
Niemann-Pick disease types A and B (NORD)
Niemann-Pick disease type C
Primary ciliary dyskinesia
Phenylketonuria (NORD)
Sickle cell disease (NORD)
Tay-Sachs disease (NORD)
Wilson disease
Fragile X syndrome
Alport syndrome
X-linked agammaglobulinemia
Fabry disease (NORD)
Glucose-6-phosphate dehydrogenase (G6PD) deficiency
Mucopolysaccharide storage disease type 2 (Hunter syndrome) (NORD)
Lesch-Nyhan syndrome
Muscular dystrophy
Ornithine transcarbamylase deficiency
Wiskott-Aldrich syndrome
Mitochondrial myopathy
Autosomal trisomies: Pathology review
Muscular dystrophies and mitochondrial myopathies: Pathology review
Miscellaneous genetic disorders: Pathology review

Glycogen storage disease type III


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High Yield Notes
7 pages

Glycogen storage disease type III

12 flashcards

USMLE® Step 1 style questions USMLE

3 questions

A 1-year-old girl is brought to the clinic for evaluation of poor growth and poor muscle tone. The mother states that the patient “doesn’t seem to be gaining weight,” despite adequate feedings. Temperature is 36.4°C (97.5°F), pulse is 98/min, blood pressure is 104/64, and respiratory rate is 35/min. Motor examination reveals diffuse hypotonia in all 4 limbs. Abdominal examination reveals hepatomegaly. Rapid fingerstick glucose is 40 mg/dL. Echocardiogram reveals left ventricular hypertrophy. Serum lactate levels are within normal limits. A liver biopsy reveals widespread fibrosis with minimal fat infiltration. Further analysis reveals accumulation of limit dextrin-like complexes in the cytosol of hepatocytes. Which of the following is the most likely diagnosis? 

External References

Glycogen storage disease type III is one of the genetic disorders affecting how the body stores and uses glycogen. People with glycogen storage disease type III have a deficiency of the glycogen debrancher enzyme (α-1,6-glucosidase), one of the enzymes that help to break down glycogen. The symptoms of glycogen storage disease type III generally appear during childhood and include generalized muscle weakness, hepatosplenomegaly, fasting hypoglycemia, and ketosis.