M05-M14: Inflammatory polyarthropathies

M07: Psoriatic and enteropathic arthropathies

Psoriatic and enteropathic arthropathies are a group of conditions that are linked with psoriasis and inflammatory bowel diseases (IBD), respectively. In psoriatic arthropathy, the immune system mistakenly attacks healthy joints and skin, leading to inflammation and producing symptoms like joint pain, stiffness, and swelling. Skin changes such as psoriasis rashes may occur before or after joint symptoms. Enteropathic arthropathy typically occurs in people who have IBD such as Crohn's disease or ulcerative colitis. Symptoms are similar to psoriatic arthritis and can include pain, swelling, and stiffness in any joint, but it's more common in the lower limbs and back. Both conditions progress gradually and can lead to joint damage over time if untreated. The exact cause is unknown, but both genetic and environmental factors are likely to play a role.