Both features were consistently present in individuals with KCNK4 variant affecting function and variably present in patients with dominant KCNN3 (30% for hypertrichosis and 67% for gingival enlargement) or KCNH1 variant (19% for hypertrichosis and 79% for gingival enlargement). The gene discussed is KCNH1; the disease is gingival overgrowth.