All are liver glycogenosis except –
**Core Concept**
Liver glycogen storage diseases are a group of inherited disorders characterized by the accumulation of glycogen in the liver due to defects in enzymes involved in glycogen synthesis or breakdown. These conditions can lead to hypoglycemia, hepatomegaly, and liver dysfunction.
**Why the Correct Answer is Right**
The correct answer is the one that does not belong to the liver glycogen storage diseases. Glycogen storage diseases are classified into several types, including type I (Von Gierke's disease), type III (Cori's disease), type IV (Andersen's disease), type VI (Hers' disease), and type IX. Type I is caused by a deficiency of glucose-6-phosphatase, type III is caused by a deficiency of the debranching enzyme, type IV is caused by a deficiency of the branching enzyme, type VI is caused by a deficiency of the liver phosphorylase, and type IX is caused by a deficiency of the phosphorylase kinase.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a recognized type of glycogen storage disease.
**Option B:** This option is incorrect because it is not a recognized type of glycogen storage disease.
**Option C:** This option is incorrect because it is not a recognized type of glycogen storage disease.
**Clinical Pearl / High-Yield Fact**
A key clinical feature of glycogen storage diseases is hypoglycemia, which can lead to seizures, coma, and even death if not promptly treated.
**Correct Answer:** D.