Seminars in oncology
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Seminars in oncology · Oct 1998
ReviewPrevention and treatment of oral mucositis following cancer chemotherapy.
The administration of many chemotherapy regimens may be complicated by toxicities that limit clinicians' abilities to deliver the most effective doses of active agents. Oral mucositis remains the dose-limiting toxicity of a variety of chemotherapeutic regimens and may result in significant morbidity, impaired nutrition, treatment delays, and dose reductions. In this report, the mechanisms of both direct and indirect stomatotoxicity are reviewed and efforts are made to help identify patient-related and treatment-related factors that predispose patients to oral mucositis. Last, various approaches to prevent and treat chemotherapy-induced mucositis are reviewed.
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Seminars in oncology · Oct 1998
ReviewEfficacy and toxicity of irinotecan in patients with colorectal cancer.
In six published phase II trials, irinotecan (CPT-II; Camptosar; Pharmacia & Upjohn Co, Kalamazoo, MI) has demonstrated consistent activity with response rates of approximately 13% to 27% in patients with advanced colorectal cancer (CRC) refractory to 5-fluorouracil (5-FU) therapy. Similar response and median survival rates have been achieved using either the US regimen (once a week for 4 weeks followed by a 2-week rest) or the European regimen (once-every-3-week schedule). The optimal administration schedule for irinotecan is uncertain. ⋯ Irinotecan has been explored as a single agent in patients with newly diagnosed CRC and has generated response rates in the range of 19% to 32% and a median survival time of approximately 12 months, suggesting a level of antitumor activity similar to that observed with 5-FU and leucovorin. Two recently completed phase III studies in 5-FU-refractory patients have shown that treatment with irinotecan confers a survival advantage compared with treatment with infusional 5-FU or best supportive care. Current studies focus on the activity of irinotecan as part of combined chemotherapy in patients with newly diagnosed advanced-stage CRC, as part of combined-modality therapy with radiation therapy, and as adjuvant chemotherapy for patients with locally advanced CRC.
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There has been a gradual evolution in the philosophy of treatment for metastatic breast cancer. It has long been known that endocrine therapy, radiotherapy, and chemotherapy could offer substantial palliative benefits to patients with symptomatic metastases. While these quality of life issues remain crucially important, it is increasingly recognized that the survival of patients with this condition also appears to be improving as a result of therapeutic advances. ⋯ The results of phase II studies suggest that of these agents, used at the recommended doses, docetaxel (Taxotere, Rhône-Poulenc Rorer, Antony, France) may be the most active, achieving an objective response rate of 59% in minimally pretreated patients and 47% when used in second-line treatment. In these studies, docetaxel was given at the standard dose of 100 mg/m2 over 1 hour. Recent results from phase III studies in which individual studies with docetaxel and paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) have been compared with standard therapies indicate that docetaxel is the most active single agent in metastatic breast cancer.