TO THE READERSHIP: An error appeared in the article by Riordan et al. (Riordan CP, Storey A, Cote DJ, et al: Results of more than 20 years of follow-up in pediatric patients with moyamoya disease undergoing pial synangiosis. J Neurosurg Pediatr [epub ahead of print March 1, 2019; DOI: 10.3171/2019.1.PEDS18457]).
In the second sentence of the Conclusions section of the Abstract, the number of patients was incorrectly stated as “5.” The corrected sentence appears below.
A history of cranial radiation was present in 4 of the 6 patients who died and in the lone patient with late stroke.
The article has been corrected online as of May 3, 2019.
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