You have fractured a transverse process. You have two transverse processes. They extend off each vertebra in the spine, one on each side. They are where some muscles and ligaments of the back attach to the spine. One of these muscles is the psoas muscle. This muscle controls the forward bending motion of the upper body and thighs. It attaches to the transverse processes of the lumbar vertebrae and the 12th thoracic vertebra.
During a fall, car accident, or other forceful injury, the psoas muscle can contract strongly as the body tries to protect itself. The contraction can be strong enough to pull off a chip of bone from the transverse process.
This fracture does not cause any injury to the spinal cord or nerves. But the force that led to this fracture can cause internal bleeding or other injuries that might not be clear at the time of your first exam. Be sure to watch for the symptoms listed under "When to contact your doctor."
This injury will take 4 to 6 weeks to heal. It can be treated at home with rest and medicine for pain and swelling. A back brace (called TLSO) or abdominal binder may be prescribed. It can reduce pain by limiting motion at the fracture site.
After the healing time, you will be advised to gradually return to normal activities over the next 3 or 4 weeks.