Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooSpondyloarthropathy

Low Back & Pelvis

What It Is

Back pain is very common, and it usually improves within a few weeks. Sometimes, though, back pain is caused by a medical condition such as ankylosing spondylitis (NHS, 2026). Ankylosing spondylitis belongs to a group of conditions called the spondyloarthropathies.

The Technical Bit

"Spondy-" means spine, "arthro-" means joint and "-pathy" means disease, so the literal translation is "disease of the joints of the spine". In medicine, though, the spondyloarthropathies (also called spondyloarthritis) are a specific group of related types of inflammatory arthritis, in which the spine and other parts of the body become inflamed (Kataria and Brent, 2004; NHS, 2023a). They can cause pain and stiffness in the spine and in other joints. Rheumatoid arthritis and osteoarthritis are different conditions and are not part of this group (Kataria and Brent, 2004).

Spondyloarthropathy is not the same as facet joint osteoarthritis, the "wear and tear" arthritis of the small joints at the back of the spine (Perolat et al., 2018). They are different conditions and are treated differently, so it is important to get the right diagnosis.

The Different Types of Spondyloarthropathy

The spondyloarthropathies include (Kataria and Brent, 2004)

  • Ankylosing spondylitis, the most common type, which mainly affects the spine
  • Reactive arthritis, which can develop after an infection of the bowel or of the genital or urinary tract
  • Psoriatic arthritis, which affects some people who have the skin condition psoriasis
  • Arthritis linked with inflammatory bowel disease, such as Crohn's disease or ulcerative colitis
  • Undifferentiated spondyloarthropathy, where the features do not fit neatly into one of the other types

These conditions are linked by a gene called HLA-B27 and by inflammation at the places where tendons and ligaments attach to bone (called enthesitis) (Kataria and Brent, 2004). Ankylosing spondylitis is a type of axial spondyloarthritis (NHS, 2023a).

Spondyloarthropathy Anatomy

Your spine is made up of a number of small bones (vertebrae) stacked on top of one another. Each vertebra is linked to the one above and the one below by a pair of small joints at the back of the spine, called facet joints (Perolat et al., 2018). Ligaments, muscles, intervertebral discs and nerves are all additional parts that make up the spine.

The bones join together to form a canal that protects the spinal cord. The spinal column has three main sections, which create its natural curves: the neck (cervical), the chest area (thoracic) and the lower back (lumbar). Below the five lumbar vertebrae, vertebrae that are fused together make up the lowest part of the spine (the sacrum and coccyx), and the sacrum connects the spine to the pelvis.

The spinal cord works like an electrical cable, carrying messages between the brain and the rest of the body. Nerves branch out from the spinal cord through openings between the vertebrae. Ligaments and muscles give the spine and upper body stability and support, and strong ligaments join the vertebrae and keep the spinal column in position.

In the spondyloarthropathies, inflammation often affects the sacroiliac joints, where the base of the spine (the sacrum) joins the pelvis, as well as the spine itself and the places where tendons and ligaments attach to bone (Kataria and Brent, 2004).

What Causes Spondyloarthropathy?

  • Genes: there is a strong link with a gene called HLA-B27, although most people who have this gene never develop the condition (NHS, 2023a; Kataria and Brent, 2004)
  • Infection: reactive arthritis usually begins one to four weeks after an infection of the bowel or of the genital or urinary tract (Kataria and Brent, 2004)
  • Other conditions: psoriasis and inflammatory bowel disease are linked with some types (Kataria and Brent, 2004)
  • Age: ankylosing spondylitis usually first starts between 18 and 40 years of age (NHS, 2023b)

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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