Longitudinal outcomes of chronically transfused adults with sickle cell disease and a history of childhood stroke.

Background: Many children with sickle cell disease (SCD) who suffer a stroke receive chronic transfusion therapy (CTT) indefinitely; however, their adulthood neurologic outcomes have not been reported. Understanding these outcomes is critical to inform decisions regarding curative therapy in childhood.

Study design and methods: In this retrospective study, we described a cohort of adults with SCD and a history of childhood stroke who received care at a single center and compared their outcomes with matched subjects without childhood stroke using chi² and Mann-Whitney U tests.

Results: Of 42 subjects with childhood stroke, all received CTT for secondary stroke prophylaxis. Five (11%) developed recurrent stroke. The rate of stroke was similar in subjects with and without childhood stroke (0.7 vs. 1.1 per 100 person·years, p = .63). Both cohorts exhibited evidence of iron overload (median ferritin 2227 vs. 1409 ng/dL, p = .10) and alloimmunization (45% vs. 45%, p = 1.0), despite receiving care in a comprehensive SCD program.

Discussion: For adults with SCD who had a childhood stroke, our results suggest CTT returns the risk of stroke to that of age-matched stroke naïve patients with SCD.