The lumbar vertebrae are the 5 largest and strongest of all vertebrae in the spine. These vertebrae comprise the lower back. They begin at the start of the lumbar curve (ie, the thoracolumbar junction) and extend to the sacrum.
1) Sarcoma [CHILDREN]: cancer of connective tissue or supportive tissues, inside of bones - Diagnosed during growth. 2) Carcinomas [ADULTS]: cancer of epithelial origin such as breasts, colon, pancreas, skin, lung which spreads to bone - Diagnosed peak growth periods.
Cancer that begins in the colon is called colon cancer, and cancer that begins in the rectum is called rectal cancer. Cancer that affects either of these organs may also be called colorectal cancer. See the following PDQ summaries for more information about colorectal cancer: Colorectal Cancer Screening.