Sacroiliitis, not elsewhere classified
Sacroiliac joint (SIJ) dysfunction has been increasingly recognized as the underlying pathology responsible for a large share of cases of chronic lower back, hip and leg pain. To diagnose SIJ ...
ICD-10 code M46. 1 for Sacroiliitis, not elsewhere classified is a medical classification as listed by WHO under the range - Dorsopathies .
The sacroiliac joints link your pelvis and lower spine. They're made up of the sacrum — the bony structure above your tailbone and below your lower vertebrae — and the top part (ilium) of your pelvis. There are sacroiliac joints in both the right and left sides of your lower back.
The signs and symptoms of SI pain start in the lower back and buttock, and may radiate to the lower hip, groin or upper thigh. While the pain is usually one sided, it can occur on both sides.
You may experience sacroiliac (SI) joint pain as a sharp, stabbing pain that radiates from your hips and pelvis up to the lower back and down to the thighs. Sometimes it may feel numb or tingly, or as if your legs are about to buckle.
The SI joint is a diarthrodial synovial joint. It is surrounded by a fibrous capsule containing a joint space filled with synovial fluid between the articular surfaces. The articular surface is made up of two, strong, C-shaped layers.
The causes of sacroiliitis include degenerative conditions such as spondyloarthritis, axial spondyloarthritis, osteoarthritis, or viral or bacterial infections. Your pelvis is composed of several different bones and joints. Like all joints, the joints in your pelvis are susceptible to inflammation and wear and tear.
SI joint fusion is a minimally invasive surgical procedure to fuse one or both joints. If both joints require fusion, typically only one joint is fused per surgical procedure and is spaced over a few months' time.
Sacroiliac Joint Location The articulation between the outer side of the spine's sacrum and the inner side of the butterfly-shaped hip bone (ilium) forms the sacroiliac joint. The SI joints are located on either side of the sacral spine and are situated deep in the pelvis.
Sacroiliac joint dysfunction affects the sciatic nerve and has similar symptoms to sciatica. However, pain along the sciatic nerve caused by sacroiliac joint dysfunction is not caused by a compressed nerve root as it exits the spine, as occurs with true sciatica.
Potential causes of sacroiliac pain include arthritis, traumatic injury, pregnancy and post-partum, systemic inflammatory conditions, and infection. Other potential contributors include spinal scoliosis, leg length discrepancy, and previous lumbar spine fusion.
The primary mechanisms of SI joint dysfunction include: Too much movement (hypermobility or instability) in the sacroiliac joint can cause the pelvis to feel unstable and lead to pain. Pain from too much motion is typically felt in the lower back and/or hip, and may radiate into the groin area.