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.
Illustration from Serra et al. (pp 458–468). Copyright Uğur Türe. Published with permission.
INCLUDE WHEN CITING Published online March 5, 2021; DOI: 10.3171/2021.2.JNS201904a.
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