In the Original Investigation titled “Association Between NRAS and BRAF Mutational Status and Melanoma-Specific Survival Among Patients With Higher-Risk Primary Melanoma,” by Thomas et al, published online in JAMA Oncology April 9, 2015 (doi:10.1001/jamaoncol.2015.0493), there was an error in wording in the Statistical Methods subsection of the Methods section. In the fourth paragraph, fourth sentence, the word “lower” should haved read “better.” The corrected sentence reads “TIL grade was included because higher TIL grade of primary melanoma is associated with better melanoma-specific survival.” This article has been corrected online.