Late Infantile Onset Krabbe Disease in Siblings with Cortical Degeneration and Absence of Cerebral Globoid Cells

Abstract

Krabbe disease, a disorder caused by the deficiency of lysosomal galactosylceramidase, is typically associated with cerebral white matter degeneration, cortical sparing, accumulation of macrophages (“globoid cells”), and ultrastructural needle-shaped inclusions. Two sisters presented with progressive neurological deterioration beginning before the age of 2.5 years. The first, who died at the age of 9 years, exhibited profound destruction of cerebral white matter with sparing of subcortical fibers but no globoid cells. The brain of the second, who died at the age of 15 years and who had a proven galactosylceramidase deficiency, exhibited white matter destruction, previously undescribed circumscribed spongiform cortical degeneration (postcentral, inferior temporal, cingulate), and cerebellar atrophy, but no globoid cells. The peripheral nerve biopsies from both girls exhibited typical needle-shaped inclusions in Schwann cells. These observations confirm the rare reports that Krabbe disease is not always associated with globoid cells in the brain. Psychosine, which accumulates in the brain, might be toxic to cortical neurons following prolonged survival. The reason for the regional susceptibility in the cerebral cortex is unknown.

Key words

Cerebral cortex - Krabbe disease - globoid cell leukodystrophy

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