BACKGROUND
Adult survivors of childhood cancer have an increased risk of cerebrovascular disease; little is known about early stroke risk in childhood cancer. Our objectives were to assess stroke prevalence in children with cancer; to establish cancer and stroke type; and to determine if modifiable risk factors for stroke were present.
METHODS
Children with stroke and cancer were compared to all children seen for cancer at a single institution from 2000–2009. An international classification of disease-9th version code search and search of existing pediatric oncology and stroke databases identified children <18 years with ischemic stroke, intracerebral hemorrhage and cerebral sinovenous thrombosis.
RESULTS
Of 1,411 children with cancer, 15 had stroke (1.1%, 95% CI: 0.6–1.7%). Strokes were 7 intracerebral hemorrhages, 5 ischemic strokes (1 of them followed by intracerebral hemorrhage), and 3 sinovenous thromboses. Stroke occurred at a median of 5 months post-cancer diagnosis. Ten children with strokes had hematologic malignancies and 5 had brain tumors. Thirteen patients died post-stroke, 8 via withdrawal of care. White blood cell count ≥48,000/mm3 was found in 4 children, all with intracerebral hemorrhage. Five of 7 children with intracerebral hemorrhage had platelets <50,000/mm3
CONCLUSIONS
Stroke has a prevalence of approximately 1% in children with cancer. Hemorrhagic stroke and ischemic stroke occur with approximately equal frequency; children with leukemia and brain tumors are at greatest risk.