what is the differance between myopathic form of - usmle2004

[ArchivalUser]

what is the difference between myopathic form of CAT deficiency and myophosphorylase deficiency?in questions their presentation and clinical features looks similar to me.

[ArchivalUser]

okt3 can u pls answer?both cause hypoglycaemia and red urine,there was a Q on UWSA i cant differentiate between these two.

[ArchivalUser]

Good question, I dont know the answer but here is what I think:
In myopathic CAT deficiency, muscle pain and progressive muscle weakness begin in childhood or adolescence while muscle pain is associated with excercice in McArdle.

What uw said to make the(clinic) difference?

[ArchivalUser]

they dont explain the differance properly.when i read kaplan clinical features are exactly same.