Spondyloarthritis, also referred to as spondylitis or SpA, diseases are currently grouped or classified in two main ways:
Inflammation in the spine and/or pelvis causes inflammatory back pain. Inflammatory back pain usually starts gradually before the age of 45, tends to improve with activity but not rest, and occurs with stiffness in the morning that lasts at least 30 minutes.
Over time, this inflammation can lead to ankylosis — new bone formation in the spine — causing sections of the spine to fuse in a fixed, immobile position. AS can also cause inflammation, pain and stiffness in other areas of the body such as the shoulders, hips, ribs, heels, and other joints.
In addition to inflammatory back and/or joint pain, inflammation of the intestine, which includes the bowel, is a predominant feature of EnA. Symptoms may include chronic diarrhea, abdominal pain, weight loss, and/or blood in the stool. The most common types of inflammatory bowel diseases are Crohn’s, ulcerative colitis, and undifferentiated colitis.
PsA frequently causes pain and swelling in the small joints of the hands and feet. Most people with PsA have a psoriasis skin rash. Some people have a “sausage digit” with a toe or finger that swells between the joints and around the joints. A portion of people with PsA also have pain and stiffness in the spine.
An infection in the intestine or urinary tract usually occurs before inflammation in the joints. ReA can cause inflammation and pain in the joints, skin, eyes, bladder, genitals, and mucus membranes. ReA frequently follows a limited course, with symptoms typically subsiding in three to 12 months. The condition does have a tendency to recur, however, and some people with ReA will develop a chronic form of arthritis.
People with USpA have symptoms and disease features consistent with spondyloarthritis, but their disease doesn’t fit into another category of SpA. For example, an adult may have iritis, heel pain (enthesitis), and knee swelling, WITHOUT back pain, psoriasis, a recent infection, or intestinal symptoms. This person’s combination of disease features suggests spondyloarthritis, but she doesn’t neatly fit into the categories of ankylosing spondylitis, psoriatic arthritis, reactive arthritis, juvenile spondyloarthritis, or enteropathic arthritis.
Symptoms begin in childhood. JSpA can look like any other type of spondyloarthritis. Enthesitis, inflammation where tendons or ligaments meet bone, is often a dominant disease feature. Children and adolescents with JSpA tend to have more peripheral arthritis than adults with SpA. The arthritis typically involves joints in the lower extremities in an asymmetric fashion.
Peripheral SpA commonly causes inflammation in joints and/or tendons outside the spine or sacroiliac joints. Commonly involved sites include joints in the hands, wrists, elbows, shoulders, knees, ankles, and feet. Inflammation of the tendons can occur in the fingers or toes (dactylitis) or where tendons and ligaments meet with bone (enthesitis). Almost all people with PsA fit into the pSpA category at some point in their disease. People with reactive arthritis, enteropathic arthritis, and undifferentiated arthritis may also fit into this category.
Donations by members of the SAA, including our corporate member Pfizer, support our programs and services.
The Spondylitis Association of America is solely responsible for all of the content hosted on spondylitis.org.
Input your search keywords and press Enter.