Study Evaluating Biomarkers in Patients With Colorectal Cancer and Native KRAS Treated With Chemotherapy + Cetuximab

Advanced colorectal cancer (ACRC) is a heterogeneous disease and classification of patients is nowadays inefficient. Roughly twenty per cent of patients present with favorable figures (less than 4 liver nodules and less than 5 cm) and are suitable for local treatments (surgery or local-ablative therapies). Additionally, 10-15% of patients have poor performance status (PS >2) or are severe disabled due to geriatric syndromes or/and co-morbid diseases that preclude any treatment strategies than best supportive care alone. The rest of patients (fit patients not suitable for radical treatments) constitute the population of patients treated with palliative therapies. Despite of it not all these patients have the same prognosis. Patients with PS 0,1 and levels of LDH