Evolving treatment of advanced colon cancer

Colorectal cancer is a common malignancy worldwide. Despite significant developments in the treatment of this disease, it still causes considerable morbidity and mortality. Recent advances include both newer cytotoxic chemotherapies and novel biologic agents. Although overall progress has been more modest than had been hoped, substantial benefits have been achieved for some patients, and the number of treatment options has substantially increased. Perhaps most importantly, treatment regimens can now be selected and tailored toward the individual patient following an informed discussion between the patient and the treating oncologist. We present in detail these recent advances and provide some insight into several promising future strategies.

[What are the new therapeutic strategies in metastatic colorectal cancer including biotherapies?]

Colorectal cancer remains one of the major causes of cancer death. Recent identification of new molecular targets led to the development of novel agents directed against growth factor receptors or key factors of angiogenesis. Recent phase III trials demonstrated a significant clinical benefit with bevacizumab, a VEGF inhibitor, and with EGFR-inhibitors, namely cetuximab and panitumumab. In this article we review the diverse treatment options combining cytotoxic and targeted therapies available for patients with metastatic colorectal cancer.

Health-related quality of life as a valid outcome in the treatment of advanced colorectal cancer

With the recent trend of improved survival, there has been a marked interest in reviewing and refining the contribution of health related quality of life (HRQoL) outcome measures of treatment in advanced colorectal cancer. However, if HRQoL data are going to be of clinical value and help both physicians and patients make decisions there is a need for a consensus on both the design and methods of measurement of HRQoL in clinical trials, and an acknowledgement of the interpretation of the outcomes in clinical practice. Whilst it is encouraging to find that the quality of HRQoL measurement in clinical research has improved significantly over the last fifteen years, with a growing number of trial-based HRQoL studies, there is still the potential to improve the use of HRQoL in clinical decision making in advanced colorectal cancer. There is also the need to further refine measurement of HRQoL to provide useful data specific to these patients. It is anticipated that developments such as the liver metastases module EORTC (QLQ-LMC21) questionnaire will increase the sensitivity to change of the generic cancer measure, the EORTC QLQ-C30 and will provide essential HRQoL information regarding the use of treatments in both the curative and palliative settings. Furthermore, easy to use simple tools such as the "minimum standard checklist for evaluating HRQoL outcomes in cancer clinical trials" might be of help in guiding investigators on the basis of minimum criteria.

Capecitabine in combination with docetaxel and mitomycin C in patients with pre-treated tumours: results of an extended phase-I trial

Preclinical data suggest that the anti-tumour activity of capecitabine is enhanced by taxanes and mitomycin C through up-regulation of thymidine phosphorylase (TP). Here, we studied safety and efficacy of the combination of capecitabine with docetaxel and mitomycin C. Two dose levels (DL) were investigated: capecitabine 1000 mg m(-2) b.i.d. on days 1-14, docetaxel 40 mg m(-2) i.v. day 1, mitomycin C 4 or 6 mg m(-2) i.v. day 1 (DL I or II). Cycles were repeated every 3 weeks. The primary aim was to determine the dose-limiting toxicities (DLT) during the first two treatment cycles and the maximum tolerated dose (MTD). A total of 46 patients (pts) refractory to standard therapies were enrolled, of whom the majority had gastrointestinal tumours (n=40). 14 pts had received >/=3 lines of prior chemotherapy. At DL I, one out of six pts experienced DLT. At DL II, two out of six pts had DLT (mucositis grade 3). Thus, DL I was determined as MTD. Among a total of 37 pts treated on DL I the following toxicities were observed during cycles 1 and 2 (number of patients with grade 1/2/3/4 toxicity; NCI-CTC v. 3.0): anaemia 10/8/3/0, leucocytopenia 4/11/1/2, thrombocytopenia 0/1/2/0, diarrhoea 8/1/2/0, stomatitis/mucositis 3/3/1/0, nausea/vomiting 10/2/0/0, and hand-foot skin reaction 5/1/1/0. Of 30 pts who received at least two treatment cycles nine achieved complete or partial remissions, six pts achieved minor remissions, and seven pts had stable disease (tumour control rate 73%). Of note, four out of 10 patients with pancreatic cancer had partial remissions. In conclusion, capecitabine can safely be combined with docetaxel (40 mg m(-2)) and mitomycin C (4 mg m(-2)). The established regimen was well tolerated and the preliminary efficacy data in this heavily pre-treated patients population appears to be promising.