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Autoimmune & Inflammatory

Behçet Disease

Also called Behcet's Disease, Behçet's Syndrome

Behçet Disease is a chronic, recurrent systemic vasculitis affecting small, medium, and large vessels of multiple organ systems. The pathophysiology involves abnormal T cell activation, increased Th1/Th17 responses, and immune complex deposition leading to vessel inflammation.

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About Behçet Disease

Behçet Disease is a chronic, recurrent systemic vasculitis affecting small, medium, and large vessels of multiple organ systems. The pathophysiology involves abnormal T cell activation, increased Th1/Th17 responses, and immune complex deposition leading to vessel inflammation. The disease is characterized by recurrent oral and genital ulceration, which occurs in nearly all patients. Recurrent painful oral ulcers are the hallmark feature, typically appearing as well-demarcated shallow ulcers with erythematous borders. Genital ulcers occur in 75% of patients and can be more painful and scarring than oral ulcers. Ocular involvement (uveitis) occurs in 50-90% of patients, ranging from mild anterior uveitis to severe posterior uveitis with retinal vasculitis, optic neuritis, and vision-threatening complications. Skin manifestations include erythema nodosum, pseudofolliculitis, papulopustules, and acne-like lesions. Vascular involvement includes superficial and deep venous thrombosis (thrombophlebitis), arterial aneurysms, and large vessel vasculitis. Neurologic manifestations (neuro-Behçet) occur in 5-30% and include meningoencephalitis, optic neuritis, and myelitis. Gastrointestinal involvement with ulceration occurs in 5-10%.

Common Symptoms

  • Recurrent painful oral ulcers (aphthous stomatitis)
  • Recurrent genital ulcers
  • Ocular involvement with eye pain, redness, and vision loss (uveitis)
  • Skin lesions including erythema nodosum and pseudofolliculitis
  • Vascular complications including thrombosis
  • Neurologic symptoms from central nervous system involvement

Who It Affects

Behçet Disease typically manifests in the second and third decades of life, though it can present at any age. It affects males more severely than females in some populations, though prevalence is roughly equal. The disease predominantly affects people from Turkey, Iran, Japan, Korea, China, Middle East, and Mediterranean regions. It is rare in Northern European and North American populations. HLA-B51 positive patients tend to have more severe disease.

Getting Involved in Clinical Trials

Clinical trials for Behçet Disease focus on TNF inhibitors (infliximab, etanercept, adalimumab), which have shown efficacy in reducing disease activity, particularly for ocular and neurologic manifestations. Trials investigate IL-6 inhibitors, IL-17 inhibitors, and other biologic therapies. Trials examine optimization of immunosuppressive regimens and development of new targeted therapies. Management requires ophthalmologic involvement for disease monitoring and preventing vision loss. Patients should consult with rheumatologists or specialists experienced in managing Behçet disease.

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