title: Intraoperative radiotherapy for recurrent and/or residual colorectal cancer.
abstract: Intraoperative radiotherapy (IORT) is an attractive boosting modality in the combined treatment of recurrent and/or residual colorectal cancer. Twenty seven patients treated with IORT are analysed. Residual disease following resection of the primary tumor was treated in 11 cases (group I). Localized recurrent disease without previous radiotherapy was treated in 11 cases (group II). IORT was used in five additional patients with local recurrences in previously irradiated areas (group III). The treatment program consisted of maximal tumor resection, IORT (10-30 Gy) to the area of residual disease and external beam radiotherapy (46-50 Gy). The median follow-up time for the entire series of patients is 11 months. Local tumor control rates are 90% in group I, 63% in group II and 60% in group III. Toxicity and complications related to IORT observed in this initial experience have been pelvic pain (29%) and lower extremity neuropathy (3%). These early clinical results suggest that the IORT combined with surgery and external beam radiotherapy is feasible in primary and recurrent disease. Local control rates obtained in patients not suitable for curative surgery are encouraging.
authors.affiliation: Department of Oncology, Clínica Universitaria de Navarra, Pamplona, Spain.
authors.forename: F A
authors.initials: FA
authors.lastname: Calvo
authors.forename: S M
authors.initials: SM
authors.lastname: Martín Algarra
authors.forename: I
authors.initials: I
authors.lastname: Azinovic
authors.forename: M
authors.initials: M
authors.lastname: Santos
authors.forename: L
authors.initials: L
authors.lastname: Escude
authors.forename: J L
authors.initials: JL
authors.lastname: Hernández
authors.forename: G
authors.initials: G
authors.lastname: Zornoza
authors.forename: J
authors.initials: J
authors.lastname: Voltas
mesh_terms: D000230:Adenocarcinoma / Q000532:radiotherapy* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015179:Colorectal Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D003131:Combined Modality Therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007430:Intraoperative Care; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000532:radiotherapy*; D011882:Radiotherapy, High-Energy; D013997:Time Factors