FGFR3 and seborrheic keratosis: The mutations in FGFR3 associated with decreased patient age and occurred more frequently in seborrheic keratosis from patients younger than 69 years (OR 6.8, 95% CI 1.16–39.20, p = 0.03); however, no difference in the FGFR3 mutations was observed based on the localization of the lesions.