CRP and digestive system neoplasm: Firstly, that an elevated C-reactive protein identifies those patients with an impaired T-lymphocytic response, since poor infiltration of gastrointestinal tumours appears to be associated with poor outcome (Jass et al, 1987; Nielsen et al, 1999) and an elevated C-reactive protein concentration has recently been shown to be inversely associated with T-lymphocyte subset infiltration (Canna et al, 2005).