Among the nonneoplastic skin lesions, all cases of seborrheic keratosis (n = 14), verruca vulgaris (n = 16), molluscum contagiosum (n = 5), and sebaceous hyperplasia (n = 13) showed diffuse staining for AQP3 (Figures 3(a)–3(d)). The gene discussed is AQP3; the disease is seborrheic keratosis.