A case of late variant form of infantile Krabbe disease with a partial deficiency of galactocerebrosidase.

A female was diagnosed as a late variant form of infantile Krabbe disease at 1 year and 3 months because of the late onset of regressive clinical course, decreased motor nerve conduction velocities, high cerebrospinal protein concentration and partial deficiency of galactocerebrosidase (15.6%) in the cultured skin fibroblasts. She showed normal development until 8 months when she lost her ability of sitting alone after febrile infection, and died accidentally at 2 years and 4 months. A considerable residual enzyme activity may correlate to the milder clinical course of this case.