TOPICS: Retinol, differentiation of epithelial cells into specialized tissue types, pancreas, isotretinoin, cystic acne, antioxidant, acute promyelocytic leukemia, liver, leafy vegetables, measles, visual pigments, night blindness, destruction of hair follicles, corneal degeneration, xerosis cutis, Bitot spots, immunosuppression, alopecia, blurred vision, vertigo, nausea and vomiting, pseudotumor cerebri, scaliness, hepatotoxic, cardiac defects, cleft palate