Systemic retinoid therapy of systematized verrucous epidermal nevus (with 1 colour plate).

In a patient with systematized verrucous epidermal nevus, marked improvement was obtained with oral administration of a new aromatic retinoid (Ro 10-9359). Mild cheilitis and thinning of scalp hair were the only side effects obser Withved. continuous treatment the good result was maintained for 10 months. Further investigation is needed to determine, whether long-term oral administration of this new drug is feasible.