Patients with metastatic colorectal cancer treated with cetuximab or panitumumab usually develop the skin toxicity which can impair patients' quality of life as well as limit the treatment. We designed this trial to assess the effect of simplified protocol of pre-emptive treatment on the observed skin toxicities during cetuximab and panitumumab treatment of colorectal cancer.
The study is a cohort observational, single center study which should result in estimation of particular types of toxicities, especially occurence of more severe (grade 2 and 3) side effects and assess the tolerance of doxycyline in the prolonged administration.
The observation in the study is biweekly and is continued up to 8 weeks.
