Kaplan-Meier estimates of survival for patients in the low-risk, intermediate-risk, and high-risk disease categories according to the presence or absence of a single mismatch. (A) No deaths occurred beyond 12 years in any group. Among low-risk patients, 12 in the matched group and 4 in the mismatched group have follow-up beyond 12 years and are indicated as censored observations at 12 years. (B) In the intermediate-risk group, 9 patients in the matched group and 8 in the mismatched group have follow-up beyond 12 years and are indicated as censored observations at 12 years. (C) In the high-risk group, 3 patients in the matched group and 1 in the mismatched group have follow-up beyond 12 years and are indicated as censored observations at 12 years.