Thirteen patients with severe rosacea (rosacea papulopustolosa, rosacea conglobata, and rhinophyma) were treated orally with 0.05, 0.5, or 1.0 mg/kg body weight 13-cis-retinoic acid (isotretinoin, Ro 4-3780) for 12-28 weeks. All patients had been treated previously with high doses of tetracyclines,
Twenty-one patients with severe acne (acne papulopustulosa, acne conglobata, acne cystica), six patients with severe rosacea (rosacea paulopustulosa, rosacea conglobata, rhinophyma), and three patients with tuberous sclerosis were treated with 13-cis-retinoic acid for 6-48 weeks. Most patients had