Number of MRI gadolinium lesions on pretransplantation and most recent posttransplantation MRI. Patients are listed on x-axis in order of enrollment. There were 3 patients who did not have posttransplantation MRIs for comparison. Order of patients and time between pre- () and posttransplantation (▪) MRIs are as listed in Table 2. The y-axis is the number of gadolinium-enhancing lesions.