This review shows that a significant proportion of patients in curative-intent clinical trials experience toxicities that result in dose modifications-dose reduction , dose delays or missed doses-despite strict selection criteria and intense monitoring .
Toxicities of systemic cancer therapies are often less frequently observed in clinical trials than in clinical practice , due to the careful selection of patients with fewer comorbidities .
Although guidelines exist for the estimation of chemotherapy dose , clinical factors like age , comorbid illness and extremes of body habitus are not considered in the method of dose calculation , which can result in significant toxicity .
Phase III trial of trimodality therapy with cisplatin, fluorouracil, radiotherapy, and surgery compared with surgery alone for esophageal cancer: CALGB 9781.
PURPOSE The primary treatment modality for patients with carcinoma of the esophagus or gastroesophageal junction has been surgery , although primary radiation therapy with concurrent chemotherapy produces similar results . As both have curative potential , there has been great interest in the use of trimodality therapy . To this end , we compared survival , response , and patterns of failure of trimodality therapy to esophagectomy alone in patients with nonmetastatic esophageal cancer . PATIENTS AND METHODS Four hundred seventy-five eligible patients were planned for enrollment . Patients were r and omly assigned to either esophagectomy with node dissection alone or cisplatin 100 mg/m(2 ) and fluorouracil 1,000 mg/m(2)/d for 4 days on weeks 1 and 5 concurrent with radiation therapy ( 50.4 Gy total : 1.8 Gy/fraction over 5.6 weeks ) followed by esophagectomy with node dissection . RESULTS Fifty-six patients were enrolled between October 1997 and March 2000 , when the trial was closed due to poor accrual . Thirty patients were r and omly assigned to trimodality therapy and 26 were assigned to surgery alone . Patient and tumor characteristics were similar between groups . Treatment was generally well tolerated . Median follow-up was 6 years . An intent-to-treat analysis showed a median survival of 4.48 v 1.79 years in favor of trimodality therapy ( exact stratified log-rank , P = .002 ) . Five-year survival was 39 % ( 95 % CI , 21 % to 57 % ) v 16 % ( 95 % CI , 5 % to 33 % ) in favor of trimodality therapy . CONCLUSION The results from this trial reflect a long-term survival advantage with the use of chemoradiotherapy followed by surgery in the treatment of esophageal cancer , and support trimodality therapy as a st and ard of care for patients with this disease
This review shows that a significant proportion of patients in curative-intent clinical trials experience toxicities that result in dose modifications-dose reduction , dose delays or missed doses-despite strict selection criteria and intense monitoring .
Toxicities of systemic cancer therapies are often less frequently observed in clinical trials than in clinical practice , due to the careful selection of patients with fewer comorbidities .
Although guidelines exist for the estimation of chemotherapy dose , clinical factors like age , comorbid illness and extremes of body habitus are not considered in the method of dose calculation , which can result in significant toxicity .