MSK: Osteochondroma: Free MSRA Podcast

🎧FREE MSRA PODCAST –Osteochondroma: Common Benign Bone Tumour Explained 🦴Welcome to the Deep Dive. In this high-yield episode, we breakdown Osteochondroma, the most common benign bone tumour, into simple,exam-friendly insights. Whether you're revising for the MSRA or just want a solid clinical overview, this one's for you. 🧠Key LearningObjectives Covered✅Definition• Osteochondroma isa non-cancerous bone growth that projectsoutward from the bone surface• It's covered by a cartilage cap and often resembles a bonymushroom or lump• Most common in children and teenagers during periods of rapidgrowth 📌Pathology &Aetiology• Arises from the growth plate (metaphysis) – due to a developmental defect or cartilage displacement• EXT1/EXT2 gene mutations linked to hereditarymultiple exostoses (HME)• Lesions stopgrowing once skeletal maturity is reached 📍Common Sites• Around the knee (distal femur, proximal tibia)• Proximal humerus, pelvis, scapula• Can be sessile (flat-based) or pedunculated (stalk-like) ⚠️Risk Factors• Age: Typically presents in late childhood oradolescence• Genetics: HME increases risk of multiplelesions and complications• No strong gender or ethnic predilection 🩺Clinical Features• Often asymptomatic, found incidentally on imaging• When symptomatic: – Painless lump near a joint – Local aches or discomfort – Nerve or vessel compression (e.g. peronealnerve → foot drop) – Bursitis, reduced joint mobility🧠Mnemonic: The 3 Ps– Pain– Palpable mass– Pressure on nerves or vessels 🔬DifferentialDiagnoses• Other benigntumours: osteoma, enchondroma• Chondrosarcoma: Rare malignant transformation• Lipoma, myositisossificans, or bony metastases (rare in this context) 🧪Diagnosis• X-ray: First-line – bony outgrowth pointingaway from joint, cortex continuous with native bone• MRI/CT: If: – Assessing cartilage cap thickness (esp. if >1.5–2cm inadults) – Evaluating nerve,vessel compression• Biopsy: If malignancy suspected or atypicalimaging 💡Key Imaging Feature– Cartilage cap>2cm in adults → raises suspicion of chondrosarcoma 💊Management• Asymptomatic: Observation, periodic review• Symptomatic: Surgical excision – Indications:pain, cosmetic concern, neurovascular compromise, growth post-maturity• Complete excisionusually curative 📈Prognosis• Excellent in mostcases• Low recurrencepost-surgery• Malignanttransformation rare (<1% solitary, up to 5% with HME) 🧠Red Flag Signs• Sudden growth in adulthood• New or worsening pain• Cartilage capenlargement 📎More MSRA Resourcesfor Osteochondroma:📝 Revision Notes:https://www.passthemsra.com/topic/osteochondroma-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/osteochondroma-flashcards/📖 Accordion Q&A Notes:https://www.passthemsra.com/topic/osteochondroma-accordion-qa-notes/🎯 Rapid Quiz:https://www.passthemsra.com/topic/osteochondroma-rapid-quiz/🦴 Quiz:https://www.passthemsra.com/quizzes/osteochondroma/ 🎓 Explore more FREE revision tools:🌐PassTheMSRA.com📚FreeMSRA.com Hashtags#MSRA #MSRARevision#Osteochondroma #BenignBoneTumour #MSKRevision #Orthopaedics #CartilageCap#PassTheMSRA #FreeMSRA #MSRAFlashcards #MSRAQuiz #MSRAAccordions