Incidence of Recurrence in Posterior Circulation Childhood Arterial Ischemic Stroke | Cerebrovascular Disease | JAMA Neurology | JAMA Network
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Original Investigation
March 2017

Incidence of Recurrence in Posterior Circulation Childhood Arterial Ischemic Stroke

Author Affiliations
  • 1Division of Neurology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
  • 2Perelman School of Medicine, University of Pennsylvania, Philadelphia
  • 3The Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
  • 4The Commonwealth Medical College, Scranton, Pennsylvania
JAMA Neurol. 2017;74(3):316-323. doi:10.1001/jamaneurol.2016.5166
Key Points

Question  Does the incidence of stroke recurrence differ between posterior circulation childhood arterial ischemic stroke (PCAIS) and anterior circulation childhood arterial ischemic stroke (ACAIS)?

Findings  In this cohort study of children with arterial ischemic stroke, recurrence of PCAIS was 19% at 1 and 3 years compared with 4% recurrence for ACAIS at 1 and 3 years.

Meaning  In our cohort, the recurrence of PCAIS exceeded that of ACAIS; thus, patients with PCAIS may warrant additional monitoring aimed at minimizing the risk of recurrence.

Abstract

Importance  Childhood arterial ischemic stroke (CAIS) affects approximately 1.6 per 100 000 children per year, while stroke recurs in up to 20% of patients at 5 years. Factors determining the risk of recurrence are incompletely understood.

Objective  To investigate the incidence of the recurrence of CAIS in the posterior and anterior circulations to determine if the risk differs between the 2 locations.

Design, Setting, and Participants  A retrospective analysis of CAIS was conducted among children enrolled in a single-center prospective consecutive cohort at The Children’s Hospital of Philadelphia between January 1, 2006, and January 1, 2015. Children with confirmed CAIS occurring between 29 days and 17.99 years were evaluated for inclusion. Patients were excluded if infarcts were located in both the anterior and posterior distributions or if CAIS occurred as a complication of intracranial surgery or brain tumor.

Main Outcomes and Measures  Stroke recurrence.

Results  The study population included 107 patients (75 boys [70.1%] and 32 girls [29.9%]; median age at AIS, 7.7 years [interquartile range, 3.1-13.6 years]). Sixty-one children had anterior circulation CAIS (ACAIS) and 46 had posterior circulation CAIS (PCAIS). Median follow-up was 20.9 months (interquartile range, 8.7-40.4 months). For ACAIS, recurrence-free survival was 100% at 1 month and 96% (95% CI, 85%-99%) at 1 and 3 years. For PCAIS, recurrence-free survival was 88% (95% CI, 75%-95%) at 1 month and 81% (95% CI, 66%-90%) at 1 and 3 years. The hazard ratio for recurrence after PCAIS compared with ACAIS was 6.4 (95% CI, 1.4-29.8; P = .02) in univariable analysis and 5.3 (95% CI, 1.1-26.4; P = .04) after adjusting for sex and cervical dissection.

Conclusions and Relevance  We identified a subgroup of patients that comprise more than 80% of recurrences of CAIS. Three years after incident stroke, 19% of children with PCAIS had a recurrence compared with 4% of patients with ACAIS. Different mechanisms of stroke may account for this difference. Children with PCAIS may warrant increased monitoring. This study highlights the necessity for further research focused on recurrence prevention.

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