1.	Acitretin Plasma Levels Under Hemodialysis Phase: Phase IV Type: Biomarker/Laboratory analysis, Prevention Status: Temporarily closed Age: 18 and over Sponsor: Other Protocol IDs: 2007DR2065 EK674, NCT00488384
2.	Phase II Study of Acitretin in Patients With Psoriasis, Cutaneous Disorders of Keratinization, Multiple Basal Cell Carcinomas, or other Retinoid-Responsive Diseases or Malignancies (Summary Last Modified 09/2001) Phase: Phase II Type: Treatment Status: Closed Age: Any age Sponsor: Protocol IDs: NCI-77-AR-0172, NCT00020956
3.	Randomized Study of Acitretin in Patients with Multiple Prior Skin Cancers Who Received Solid Organ Transplantation Phase: No phase specified Type: Prevention Status: Completed Age: 18 and over Sponsor: NCI Protocol IDs: NCCTG-969251, NCI-P98-0137, NCT00003611
4.	Acitretin in Preventing Skin Cancer in Patients at High Risk for Skin Cancer Phase: No phase specified Type: Biomarker/Laboratory analysis, Prevention Status: Completed Age: 18 and over Sponsor: NCI, Other Protocol IDs: CDR0000582327, P30CA015083, MC02C8, 1153-98, MAYO-MC02C8, NCT00644384