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Gastrointestinal Cancer

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HOUSTON--A new tumor-selective agent may permit delivery of higher levels of 5-fluorouracil (5-FU) with lower toxicity, said Richard Pazdur, MD, of M.D. Anderson Cancer Center. A phase III trial of capecitabine is ongoing in colorectal cancer, and it is also under study for the treatment of breast cancer.

ROCKVILLE, Md--In the first report issued under its new Evidence-based Practice Initiative, the Agency for Health Care Policy and Research (AHCPR) has reaffirmed that early detection and treatment provide the primary means of preventing death from colorectal cancer.

Dr. Rich presents a comprehensive overview of adjuvant therapy for advanced operable rectal cancer. He emphasizes the roles of infusional chemoradiation in both the adjuvant setting and as sole therapy. Unless otherwise specified, the following comments pertain to clinically resectable B2-C (T3, N0-N1) adenocarcinoma of the rectum.

Until 1980, the greatest advances in the management of rectal cancer were technical ones. Whereas in the past most patients with rectal cancer underwent an abdominoperineal resection, it became possible in the 1980s to maintain intestinal continuity in the majority of patients with a low anterior resection and colorectal anastomosis and, more recently, with a low anterio resection and coloanal anastomosis. These advances were due, in part, to the development of stapling devices, which allowed surgeons to perform anastomoses that were technically difficult to perform by hand. More importantly, it became clear that in tumors identified at a relatively early stage, retrograde tumor spread was uncommon, and a 2-cm distal margin was generally adequate.

Dr. Enker offers an orderly presentation of many of the factors related to sphincter-preserving operations, quality of life, and outcome in the surgical management of the patient with rectal cancer. From the practical perspective of a very experienced surgeon, he provides broad guidelines for sphincter-conservation surgery that both the surgeon and nonsurgeon should find useful.

This review nicely summarizes the current state of combined-modality therapy for resectable rectal cancer, largely covering trials currently in progress in the United States. Although the article's title is "Multidisciplinary management of resectable rectal cancer," it really doesn't emphasize how multiple specialists manage rectal cancer patients per se, and thus, the article would probably be more appropriately titled, "Combined-modality therapy in resectable rectal cancer." It would have been interesting if the article had included more details on how radiation oncologists, medical oncologists, and surgeons can cooperate to deliver combined-modality therapy in higher proportions of patients with resectable rectal cancer, but this is a minor criticism.

In his excellent, thorough review of the current status of multidisciplinary treatment for rectal cancer, Dr. Minsky appropriately emphasizes the role that data from prospective clinical trials have played in providing the foundation for adjuvant therapy for patients with this disease. The principal therapeutic options discussed by Dr. Minsky are preoperative therapy and postoperative therapy.

BUFFALO, NY--New analysis of familial colorectal cancer data suggests that the disease is not associated with genetic anticipation--the earlier onset of disease in successive generations--said Gloria M. Petersen, PhD, at the Eighth Annual Meeting of the ICG-HNPCC (International Collaborative Group-Hereditary Nonpolyposis Colorectal Cancer).

A month of postoperative radiotherapy preceded by radiosensitizing boluses of fluorouracil (5-FU) slashed the recurrence rate and markedly improved survival in patients with Dukes B and C rectal cancer in a study from the Norwegian Adjuvant Rectal Cancer Project Group, presented at the European Cancer Conference (ECCO-8).