Blood markers for cancer

### What you need to know A 61 year old man with a one month history of back pain visits his general practitioner (GP). He has hypertension, has never smoked, and reports fatigue for several months. The pain is keeping him awake at night. He has not lost weight. Clinical examination is normal. The differential diagnosis for this patient is wide, including potential malignant causes such as pancreatic, myeloma, and prostate cancer or metastatic...