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MR imaging of phenylketonuria
D W Shaw1, K R Maravilla, E Weinberger
1Department of Radiology, University of Washington School of Medicine, Seattle 98195.
AJNR. American Journal of Neuroradiology
|May 1, 1991
Summary
Phenylketonuria (PKU) patients show demyelination on MRI scans. Better dietary control of phenylalanine levels correlates with less severe white matter abnormalities in these patients.
Area of Science:
- Neurology
- Radiology
- Biochemistry
Background:
- Phenylketonuria (PKU) is a genetic disorder.
- Elevated phenylalanine levels can lead to neurological complications.
- Cranial MRI is a key imaging technique for assessing brain structure.
Purpose of the Study:
- To characterize MRI findings in classical PKU patients.
- To correlate MRI abnormalities with clinical and biochemical data.
- To investigate the impact of phenylalanine control on brain white matter.
Main Methods:
- Cranial Magnetic Resonance (MR) imaging was performed.
- T2-weighted sequences were used to identify white matter changes.
- MR findings were compared with patient age, clinical history, and phenylalanine levels.
Main Results:
- MR imaging revealed demyelination-consistent abnormalities in all nine patients.
- Increased signal on T2-weighted images was most prominent in periventricular deep cerebral white matter, particularly posteriorly.
- Patients with well-controlled phenylalanine levels exhibited less severe white matter abnormalities.
Conclusions:
- Cranial MR imaging can detect demyelination in PKU patients.
- White matter abnormalities in PKU are related to phenylalanine levels.
- Dietary management is crucial for mitigating neurological damage in PKU.