CRP and Cachexia: Involuntary weight loss (WL), adjusted to the body mass index (BMI), represents the validated cardinal criterium of the international consensus-definition for cancer cachexia, which distinguishes between cachectic and non-cachectic patients with regards to all other cachexia domains proposed (e.g., C-reactive protein [CRP], food intake, appetite loss, performance status [PS]) (1–3).