Improvement of tear lysosomal enzyme levels after treatment with bone marrow transplantation in a patient with I-cell disease.

We examined the lysosomal enzyme levels in tear fluids from a patient with I-cell disease after treatment by bone marrow transplantation. Acid phosphatase, beta-D-glucuronidase, N-acetyl-beta-D-glucosaminidase, alpha-L-fucosidase and alpha-D-mannosidase activities were reduced to normal or nearly normal levels after the treatment. We believe that the measurement of tear enzyme levels in I-cell disease is useful for knowing the efficacy of the bone marrow transplantation.