Van Voorst Vader P C, Van Oostveen F, Hasper M F
Acta Derm Venereol. 1984;64(4):360-1.
Treatment with 13-cis-retinoic acid during 12 weeks of a patient with multiple trichoepitheliomas and acne cystica et comedonica did not affect the number of trichoepitheliomas. The cystic lesions, most of them trichoepitheliomas with only a few non-inflammatory cystic acne lesions, were not affected by this treatment.