CASE REPORTS
JOURNAL ARTICLE
Adult-type metachromatic leukodystrophy with a compound heterozygote mutation showing character change and dementia.
Psychiatry and Clinical Neurosciences 1999 June
A 26-year-old Japanese woman slowly developed a change of character such as hypospontaneity and blunted affect, followed by obvious mental deterioration. She was diagnosed as having a disorganized type of schizophrenia at the first examination. Brain magnetic resonance imaging demonstrated diffuse high intensity in the cerebral white matter, particularly in the frontal lobes. The single photon emission computed tomography images using 123I-IMP disclosed diffuse cerebral hypofusion, especially in the frontal lobes. Electroencephalogram showed a moderate amount of 5-6Hz theta waves on the background of alpha activity. Nerve conduction velocities in the extremities were delayed. The level of leucocyte arylsulphatase was low. In the arylsulphatase A gene analysis, a compound heterozygote having the 99Gly-->Asp and 409Thr-->Ile mutations was confirmed. The patient was diagnosed as having metachromatic leukodystrophy. She gradually showed obvious dementing symptoms such as memory disturbance and disorientation. The characteristics of the psychiatric symptoms in the leukodystrophy are discussed.
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