Piriformis syndrome is pain and numbness in your buttocks and down the back of your leg. It occurs when the piriformis muscle in the buttocks presses on the sciatic nerve.| medlineplus.gov
You were in the hospital for spine surgery. You probably had a problem with one or more disks or spine bones. A disk is a cushion that separates the bones in your spine (vertebrae).| medlineplus.gov
An epidural steroid injection (ESI) is the delivery of powerful anti-inflammatory medicine directly into the space outside of the sac of fluid around your spinal cord. This area is called the epidural| medlineplus.gov
X-rays are a type of electromagnetic radiation, just like visible light.| medlineplus.gov
A magnetic resonance imaging (MRI) scan is an imaging test that uses powerful magnets and radio waves to create pictures of the body. It does not use ionizing radiation (x-rays).| medlineplus.gov
Unexplained weight loss is a decrease in body weight, when you did not try to lose the weight on your own.| medlineplus.gov
Low back pain refers to pain that you feel in your lower back. You may also have back stiffness, decreased movement of the lower back, and difficulty standing straight.| medlineplus.gov
A tumor is an abnormal growth of body tissue. Tumors can be cancerous (malignant) or noncancerous (benign).| medlineplus.gov
Spondylolisthesis is a condition in which a bone (vertebra) in the spine moves forward, out of its proper position, in relation to the bone below it.| medlineplus.gov
A herniated (slipped) disk occurs when all or part of a disk is forced through a weakened part of the disk. This may place pressure on nearby nerves or the spinal cord.| medlineplus.gov
Spinal stenosis is narrowing of the spinal column that causes pressure on the spinal cord, or narrowing of the openings (called neural foramina) where spinal nerves leave the spinal column.| medlineplus.gov