Intraoperative radiation therapy in integrated treatment of rectal cancers. Results of phase II study

Diseases of the Colon and Rectum
L SofoF Crucitti

Abstract

Risk of local recurrence of rectal cancer remains high despite extensive therapeutic strategies, many of which have been tried to achieve better local control (i.e., external beam radiation therapy (EBRT)). Recently, intraoperative radiation therapy (IORT) has been introduced in clinical protocols to boost the areas at risk of local recurrence. Between April 1990 and December 1995, 44 patients with "high risk" (T3,N0-2 primary tumors) extraperitoneal rectal tumors and 24 patients with "locally advanced" (2 T3,N3 and 11 T4,N0-3 primary tumors; 11 local recurrences) tumors entered a protocol that included preoperative EBRT (38 Gy), surgery plus IORT (10 Gy) in the high-risk group, and preoperative EBRT (45-48 Gy) and concomitant computerized tomography (5-fluorouracil plus mitomycin C), surgery plus IORT (10-15 Gy), and postoperative adjuvant computerized tomography (5-fluorouracil plus folinic acid) in the locally advanced group. In the high-risk group, acute Grade 3 (Radiation Therapy Oncology Group scale) skin toxicity, attributable to preoperative treatment, involved one patient (2.2 percent); among locally advanced cases, Grade 3 hematologic toxicity was observed in one patient (4.1 percent). Treatment was discontinued in no...Continue Reading

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Jun 7, 2005·International Journal of Radiation Oncology, Biology, Physics·Fabio Maria VecchioClaudio Coco
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