title: Tissue changes in psoriatic plaques after oral administration of retinoid.
mesh_terms: D000284:Administration, Oral; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D006801:Humans; D011565:Psoriasis / Q000188:drug therapy* / Q000473:pathology; D012867:Skin / Q000473:pathology / Q000648:ultrastructure; D014212:Tretinoin / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D014801:Vitamin A; D014212:Tretinoin