title: Evaluation of a sequential 5-FU and hydroxyurea combination in advanced bowel cancer.
abstract: Twenty-nine patients (two with small bowel cancer and 27 with colorectal cancer) were treated with a sequential 5-FU-hydroxyurea combination following the suggestion of schedule-dependent synergism in experimental systems. No enhanced toxicity was observed, but the response rate was only 4%. Seven additional patients manifested greater than or equal to 50% declines in CEA, but caution must be used in interpreting such changes as antitumor activity.
mesh_terms: D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000008:administration & dosage; D002272:Carcinoembryonic Antigen / Q000032:analysis; D003110:Colonic Neoplasms / Q000188:drug therapy*; D005260:Female; D005472:Fluorouracil / Q000008:administration & dosage*; D006801:Humans; D006918:Hydroxyurea / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D012004:Rectal Neoplasms / Q000188:drug therapy*
chemical_list: D002272:Carcinoembryonic Antigen; D005472:Fluorouracil; D006918:Hydroxyurea