Neuro: Duchenne Muscular Dystrophy: Free MSRA Podcast

🧬 FREE MSRA PODCAST – Duchenne Muscular Dystrophy (DMD)🎧 In this neurology deep dive, we decode Duchenne muscular dystrophy – from genetics to diagnosis to multidisciplinary management. If you’re preparing for the MSRA, this episode breaks down the core facts, pathophysiology, and high-yield clinical features straight from exam-focused revision notes.🧠 Key Learning Points📌 Definition• Severe X-linked recessive genetic disorder causing progressive muscle degeneration.• Mutation in the dystrophin gene → lack of dystrophin protein → unstable muscle fibres → weakness.📌 Genetics & Pathophysiology• X-linked inheritance → affects boys; 50% risk for sons of carrier mothers.• Dystrophin = shock absorber for muscle fibres.• Without it: repeated damage → inflammation → fibrosis + fat replace muscle = pseudo-hypertrophy.• DMD = frameshift mutations → non-functional protein.• Becker MD = non-frameshift → milder.📌 Epidemiology• 1 in 3,500–5,000 male births (UK).• Symptoms begin before age 5.📌 Clinical Features• Progressive proximal weakness (legs, hips).• Gower's sign, waddling gait, motor delay.• Pseudohypertrophy of calves.• Contractures, cardiomyopathy, learning difficulties.• Often wheelchair-bound by age 12.📌 Investigations• Creatine kinase (CK): 50–100x normal – early red flag.• Genetic testing: confirms dystrophin mutation.• Muscle biopsy: if genetic results inconclusive.• ECG + echocardiogram → check for cardiomyopathy.• Pulmonary function tests + female carrier testing.📌 Differential Diagnosis• Becker MD• Limb-Girdle MD• Spinal Muscular Atrophy• Other myopathies📌 Management• Multidisciplinary: neurology, cardiology, physio, respiratory, psychology.• Steroids (e.g. prednisolone) to slow decline.• Ataluren: for nonsense mutations (age >5).• Physiotherapy, orthopaedics, ventilatory support, cardiac monitoring, nutritional & speech therapy.• Palliative care in later stages.📌 Complications & Prognosis• Loss of mobility, respiratory failure, cardiomyopathy = life-limiting.• Death typically by 20s–30s from respiratory or cardiac issues.• Other: scoliosis, constipation, osteoporosis, obesity, learning difficulties, GI issues.📌 Future Therapies• Gene therapy & exon skipping under development.• Early diagnosis = earlier intervention & access to trials.📌 Memory Tips• CK 50–100x normal = strong DMD clue.• Gower’s sign = classic visual cue.• X-linked = mainly boys.• Big calves, weak legs = pseudo-hypertrophy.• Heart + lungs = focus of late-stage care.📚 More MSRA Resources for Duchenne Muscular Dystrophy📝 Revision Notes: https://www.passthemsra.com/topic/duchenne-muscular-dystrophy-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/duchenne-muscular-dystrophy-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/duchenne-muscular-dystrophy-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/duchenne-muscular-dystrophy-rapid-quiz/🧪 Quiz Bank: https://www.passthemsra.com/quizzes/duchenne-muscular-dystrophy/🎓 Full Neurology Course: https://www.passthemsra.com/courses/neurology-for-the-msra/Learn more and test yourself athttps://www.passthemsra.com/https://www.freemsra.com/Hashtags#MSRA #DuchenneMuscularDystrophy #NeurologyMSRA #MSRAQuiz #MSRAFlashcards #MSRAAccordions #MSRARevisionNotes #MSRAQuestionBank #MSRAOnlineRevision #UKMedicalExams