MSK: Dactylitis: Free MSRA Podcast

🖐️Deep Dive: Dactylitis– The Sausage Digit ClueEverseen a swollen finger or toe that looks like a mini sausage? 🌭 That’s not just random puffiness — it could be dactylitis, a key sign in several important systemicconditions. In this high-yield episode, we explore everything you need to knowfor the MSRA. 📌What Is Dactylitis?• Dactylitis = inflammation of an entire digit (finger or toe)• Often referred toas a “sausage digit” due to its uniform, swollen appearance• It’s not adiagnosis in isolation — it’s usually a clinicalclue to something bigger 🧠Causes &Associations• Strongly linkedwith: – Psoriatic arthritis – Reactive arthritis (post-infective) – Sickle cell disease (especially in children –"hand-foot syndrome")• Other rarercauses: – Tuberculosis, sarcoidosis,syphilis• Part of the spondyloarthritis family (think enthesitis,axial involvement) ⚠️PathophysiologySimplified• Inflammationaffects joints, tendons, entheses, andsoft tissue• Cytokine-drivenimmune response → swelling, pain, impaired function• Often driven by autoimmune dysregulation or vaso-occlusion in sickle cell🧬Mnemonic: “JETS”JointsEnthesesTendonsSoft tissue 🩺DifferentialDiagnosis (Don’t Miss These)• Infection – cellulitis, osteomyelitis• Trauma – crush injuries, fractures• Crystal arthropathies – gout, pseudogout• Other arthritis types – RA, OA• Peripheral neuropathies💡Memory Aid: “ITCGOA”InfectionTraumaCrystalsGeneral arthritisOther causesAutoimmune (RA, PsA) 📊Epidemiology• Seen in 20–40% of patients with psoriatic arthritis• Common in children with sickle cell disease• Prevalencereflects that of underlying conditions• More common in African/Mediterranean descent populations (re:sickle cell) 🔍Clinical Features• Uniform swellingof the entire digit• Pain, stiffness,difficulty moving the finger or toe• May be tender,warm, red• Usually not limited to a single joint — affects fullsoft tissue structures 🧪Investigations🔹Imaging:• X-ray – to assess for bone/joint changes• Ultrasound – excellent for visualising softtissue inflammation• MRI – for deeper structural involvement ifdiagnosis unclear🔹Blood tests:• Inflammatory markers – ESR, CRP• Autoimmune screens – RF, anti-CCP (RA), HLA-B27• Haematology – blood film, sickle cell screen 💊Management🎯 Goal: Treat the underlying condition + manage inflammation🔹Pharmacological• NSAIDs – first-line for pain and inflammation• DMARDs – e.g. methotrexate for PsA• Biologics – TNF inhibitors forsevere/refractory cases• Analgesics – for supportive care🔹Non-pharmacological• Physiotherapy – preserve mobility• Splinting – rest, reduce stress on the digit• Hydration + analgesia – for sickle cell-relatedepisodes 📉Complications ifUntreated• Joint deformity• Chronic pain• Reduced function or dexterity• Loss of range of motion• Potentiallong-term disability🧠Key Message:Treat the cause.Treat the dactylitis. Early recognition iscrucial. 📚MSRA RevisionResources📝 Dactylitis Revision Noteshttps://www.passthemsra.com/topic/dactylitis-revision-notes/🧠 Flashcardshttps://www.passthemsra.com/topic/dactylitis-flashcards/❓ Accordion Q&A Noteshttps://www.passthemsra.com/topic/dactylitis-accordion-qa-notes/⚡ Rapid Fire Quizhttps://www.passthemsra.com/topic/dactylitis-rapid-quiz/🧪 Quiz Practice Pagehttps://www.passthemsra.com/quizzes/dactylitis/ 🌐More Free MSRA Help• https://www.passthemsra.com – full paidrevision library• https://www.freemsra.com – free notes,quizzes & guides 🎓 #MSRA #Dactylitis #MSRARevision #SausageDigit#PsoriaticArthritis #SickleCell #ReactiveArthritis #MSRAFlashcards #MSRAQuiz#PassTheMSRA #FreeMSRA #HaematologyMSRA #InflammatoryArthritis #MSRAQandANotes#MSRAAccordions