A 54-year-old woman with a myelodysplastic syndrome treated with high-dose
chemotherapy and an allogenic bone marrow transplant developed acute cortic
al blindness while receiving tacrolimus (FK506). MRI showed white matter ab
normalities. After discontinuation of FK506, the patient's vision returned
within 8 days. FK506 neurotoxicity is similar to cyclosporine neurotoxicity
and can occur in allogenic bone marrow transplant patients treated with FK
506.