Arthritis and coeliac disease

Area of Science:

• Gastroenterology
• Rheumatology
• Immunology

Background:

• Coeliac disease is an autoimmune disorder triggered by gluten.
• Arthritis is a known extraintestinal manifestation of coeliac disease, though often underdiagnosed.
• The relationship between coeliac disease and specific types of arthritis requires further elucidation.

Observation:

• Six patients presented with prominent arthritis at coeliac disease diagnosis, with joint pain preceding diagnosis by up to 15 years.
• Commonly affected joints included the lumbar spine, hips, and knees; three patients lacked gastrointestinal symptoms.
• All patients were seronegative for rheumatoid factor, and two had abnormal X-rays; HLA-typing revealed common associations.

Findings:

• Diagnosis of coeliac disease was confirmed via jejunal biopsy in all patients.
• All patients experienced significant improvement in joint symptoms following a gluten-free diet.
• Gluten challenge did not provoke arthritis in the three patients tested.
• A separate study found no arthritis attributable to coeliac disease in 160 treated patients, contrasting with higher rates in Crohn's disease controls.

Implications:

• Arthritis appears to be a rare but treatable manifestation of coeliac disease.
• This association offers insights into the role of gastrointestinal antigens in rheumatic diseases.
• Further research may clarify the immunopathogenic mechanisms linking gut inflammation to joint disease.