MSK: Behçet's Syndrome: Free MSRA Podcast

🌍 Behçet’s Syndrome (Behcet’s Disease) – Deep Dive RapidReview DefinitionBehçet’s syndrome is a chronic, relapsing, multisystem inflammatory disease characterised by vasculitis (inflammation of blood vessels) and a classic triad of:Recurrent oral ulcersGenital ulcersUveitis (eye inflammation)Can affect skin, joints, blood vessels, brain, and gut. Epidemiology & RiskMost common along the "Silk Road" (Mediterranean, Middle East, East Asia)UK prevalence: ~1 in 10,000–20,000 (rare)Peak onset: Age 20–40, more common in menGenetics: HLA-B51 association (not diagnostic) AetiologyCause unknownLikely a mix of genetic predisposition (HLA-B51) and environmental trigger (infection/other antigen)Pathophysiology: Immune complex–mediated vasculitis Mnemonic for Clinical Features:MOGS-JBBGM – Mouth ulcers (recurrent, almost universal)O – Ocular involvement (uveitis, retinal vasculitis)G – Genital ulcers (recurrent)S – Skin lesions (erythema nodosum, pseudofolliculitis, acneiform pustules)J – Joints (arthritis, often knees/ankles)B – Brain/CNS (meningoencephalitis, headaches, neuro-Behçet’s)B – Blood vessels (thrombosis, DVT, aneurysms)G – GI tract (abdominal pain, colitis, ulcers) Classic TriadOral ulcersGenital ulcersUveitis Other Important FeaturesErythema nodosum – tender, red nodules (usually on shins)Pathergy test – sterile needle prick → papule/pustule within 24–48 hours (not always positive)Thrombosis/DVT – risk of clots due to vasculitis Differential DiagnosisOther vasculitides (SLE, ANCA-associated)Crohn’s disease/IBD (for GI symptoms)HSV, aphthous stomatitis (for oral/genital ulcers)Other causes of uveitis DiagnosisClinical diagnosis – pattern recognition using history and examSupportive investigations:Raised ESR/CRPHLA-B51 (supportive only)Pathergy testBiopsy (shows vasculitis if taken from ulcer/skin lesion)Eye exam (for uveitis)Imaging (MRI if CNS, angiography for vascular)No single definitive test!International Criteria (ICBD) often used ManagementMultidisciplinary team (Rheumatology, Ophthalmology, Dermatology, Neurology, etc.)Acute flares:Corticosteroids (oral or topical)Long-term immunosuppression:Azathioprine, methotrexate, colchicine (mild)Biologics (anti-TNF agents e.g., infliximab) for severe/refractory diseaseOther:Topical treatments for ulcers, pain relief, supportive careEducation: symptom recognition, compliance, regular follow-up PrognosisChronic, relapsing-remitting courseVariable – can be mild or severe; risk of blindness (uveitis), thrombosis, aneurysm, CNS complicationsGood quality of life with optimal management and close monitoring ComplicationsVision loss (from uveitis/retinal vasculitis)CNS involvement (stroke, meningoencephalitis)Large vessel vasculitis (aneurysms, thrombosis)GI perforation (if colitis severe)Chronic joint pain, skin scarring Key Revision PointsMOGS-JBBG covers all systems: Mouth, Ocular, Genital, Skin, Joints, Brain, Blood vessels, GutTriad is classic: oral ulcers, genital ulcers, uveitisThink of Behçet’s in: Young men, recurrent oral/genital ulcers, eye symptoms, and history from at-risk regionsNo diagnostic test—it’s clinical, pattern-based Top Revision ResourcesBehçet’s Syndrome Revision NotesBehçet’s Syndrome FlashcardsAccordion Q&A NotesRapid Fire QuizQuizPassTheMSRA.comFreeMSRA.com #MSRA#BehcetsSyndrome #Autoimmune #Vasculitis #MSRARevision #Rheumatology#PassTheMSRA