The clinical similarties between the cutaneous manifestations, specially, the heper-kerototic follicular papules of hypoyitaminosis and those of Darier's disease and pity riasis, rubra pilaris, provide the rationale for the first testing Vitamin-A, as a therapy for skin diseases.Table I shows the trials taken on 125 patients, which attended our clinic, suffering from Acene, Plaques of Psoriasis...