title: Photodynamic therapy in gastrointestinal cancer.
abstract: Six patients with an early stage of gastrointestinal (GI) cancer (T1N0M0, stage I) were successfully treated by photodynamic therapy (PDT) as follows: esophagus-1, stomach-2, rectum-3. The patients were photosensitized 72 hrs prior to treatment with pure hematoporphyrin at a dose of 5.10(-6) kg/kg b.w. in a slow intravenous infusion. Argon-pumped dye laser light at 0.630 microns wavelength was used in single and multiple treatment sessions with the power density ranging from 0.015 to 0.192 W.m-2 and a dose varying from 0.320 to 1.600 kJ.m-2. Tumor eradication (complete response) was obtained in each of the patients. No early or late treatment related complications were recorded. The patients were followed-up in the course of 7-16 months after treatment and no local recurrence or general development of disease (metastases) were reported. PDT in the early stage of GI carcinoma was recognized as a radical therapeutic method in clinical oncology.
authors.affiliation: Dept. of Surgery, National Oncological Center, Sofia, Bulgaria.
authors.forename: S
authors.initials: S
authors.lastname: Karanov
authors.forename: M
authors.initials: M
authors.lastname: Shopova
authors.forename: H
authors.initials: H
authors.lastname: Getov
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy; D000328:Adult; D000368:Aged; D001128:Argon; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy; D004938:Esophageal Neoplasms / Q000188:drug therapy*; D005260:Female; D005500:Follow-Up Studies; D006415:Hematoporphyrins / Q000008:administration & dosage / Q000627:therapeutic use; D006801:Humans; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D010778:Photochemotherapy / Q000379:methods; D012004:Rectal Neoplasms / Q000188:drug therapy*; D012074:Remission Induction; D013274:Stomach Neoplasms / Q000188:drug therapy*
chemical_list: D006415:Hematoporphyrins; D001128:Argon