Middle back pain: How to know if it is a normal pain or a symptom of cancer

A range of cancers can show up as pain in the middle of the back, either because they originate close to the spine, or because they metastasize into it. Tumors that arise within the spine itself, whether secondary, are especially significant, since they directly impinge on the bones and nerves. Lung and breast cancers, multiple myeloma and gastrointestinal malignancies such as stomach or colon carcinoma, can all lead to back discomfort, by invading or pressing on structures