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 .
Neoadjuvant chemotherapy plus cystectomy compared with cystectomy alone for locally advanced bladder cancer.
BACKGROUND Despite aggressive local therapy , patients with locally advanced bladder cancer are at significant risk for metastases . We evaluated the ability of neoadjuvant chemotherapy to improve the outcome in patients with locally advanced bladder cancer who were treated with radical cystectomy .  METHODS Patients were enrolled if they had muscle-invasive bladder cancer ( stage T2 to T4a ) and were to be treated with radical cystectomy .  They were stratified according to age ( less than 65 years vs. 65 years or older ) and stage ( superficial muscle invasion vs. more extensive disease ) and were r and omly assigned to radical cystectomy alone or three cycles of methotrexate , vinblastine , doxorubicin , and cisplatin followed by radical cystectomy . RESULTS We enrolled 317 patients over an 11-year period , 10 of whom were found to be ineligible ; thus , 154 were assigned to receive surgery alone and 153 to receive combination therapy . According to an intention-to-treat analysis , the median survival among patients assigned to surgery alone was 46 months , as compared with 77 months among patients assigned to combination therapy ( P=0.06 by a two-sided stratified log-rank test ) . In both groups , improved survival was associated with the absence of residual cancer in the cystectomy specimen . Significantly more patients in the combination-therapy group had no residual disease than patients in the cystectomy group ( 38 percent vs. 15 percent , P<0.001 ) . CONCLUSIONS As compared with radical cystectomy alone , the use of neoadjuvant methotrexate , vinblastine , doxorubicin , and cisplatin followed by radical cystectomy increases the likelihood of eliminating residual cancer in the cystectomy specimen and is associated with improved survival among patients with locally advanced bladder cancer
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 .