TO THE READERSHIP: An error appeared in the article by Schwartz et al. (Schwartz TH, McDermott MW. The Simpson grade: abandon the scale but preserve the message. J Neurosurg. Published online October 9, 2020. doi:10.3171/2020.6.JNS201904).
In the section “Confusing the Simpson Grade With Maximal Safe Resection,” the sentence below incorrectly stated “recurrence-free survival.” The correct term is “recurrence rates.”
Moreover, grade 0 resection was not attempted, and the 5- and 10-year recurrence rates were only 2.3% and 4.3%, respectively.
The article has been corrected online as of March 5, 2021.
INCLUDE WHEN CITING Published online March 5, 2021; DOI: 10.3171/2021.2.JNS201904a.
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