Brain MRI is not an initial or routine component of the evaluation of a weak child.
Abnormal MRI does not exclude a neuromuscular disease.
Most neuromuscular diseases have normal MRI of brain, but some have characteristic abnormalities.
Note of warning:If transaminases (AST and ALT) are elevated, check CK. Since AST/ALT can come from muscle or the liver, while CK comes only from muscle, this test will help localize the child's problem and may prevent unnecessary liver tests.
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