KIT and neoplasm: The KIT mutation-positive subgroup also had a significantly higher rate of tumor recurrence (relative risk [RR]= 2.06, 95% CI: 1.37–3.11; P = 0.0005) and metastasis (RR = 2.77, 95% CI: 1.64–4.67; P = 0.0001) than the KIT mutation-negative subgroup [48].