Master the orthopaedic principles of Legg-Calvé-Perthes disease, including idiopathic avascular necrosis of the femoral head in children. Learn the critical Herring lateral pillar classification and containment principles. ⏱ Chapters 0:00 Intro 0:26 Essentials 0:56 Nfrr 1:31 Gleam 2:01 Herring 2:40 Late 3:09 Algorithm 4:08 Stulberg 4:37 Numbers 4:59 Clinical reasoning — Manage 5:25 Clinical reasoning — Pearls This in-depth masterclass covers the complete pathology, epidemiologyand management of Legg-Calvé-Perthes disease. We explore the four radiological stages of the condition's natural history, the most reliable classification systemsand the surgical decision-making framework required to preserve the developing hip and prevent early osteoarthritis. 🦴 IN THIS VIDEO YOU'LL LEARN • The epidemiology, associationsand underlying vascular pathology of idiopathic avascular necrosis in the paediatric hip • Waldenström's four radiographic stages: Necrosis, Fragmentation, Reossificationand Remodelling (NFRR) • The Herring lateral pillar classification system and how it dictates modern treatment and prognosis • Catterall's head-at-risk signs using the GLEAM mnemonic to identify hips requiring proactive intervention • The LATE mnemonic for recalling poor prognostic factors, including the critical importance of skeletal age • The biological rationale and clinical application of the containment principle during the healing process • Age-dependent surgical decision-making, including when to observe versus when to operate • Surgical containment and salvage options such as varus femoral osteotomy and Salter pelvic osteotomy ⏱️ CHAPTERS 📌 KEY TAKEAWAYS ✔️ Skeletal age at onset is the most important prognostic factor; children under six have tremendous remodelling potential. ✔️ Herring lateral pillar classification is the modern gold standard, assessed during the maximal fragmentation stage. ✔️ The primary goal of treatment is to maintain a contained femoral head within the acetabulum to ensure a spherical mature hip. ✔️ The natural history of Perthes is self-limiting over two to four years, making time-dependent observation key in younger patients. ✔️ Surgical containment is typically indicated for children aged six to eight with Herring B/C or C classifications. 👩⚕️ WHO THIS IS FOR This masterclass is designed for orthopaedic surgical trainees, junior doctorsand medical students seeking a comprehensive understanding of paediatric hip disorders. Curious patients and caregivers looking for an in-depth, medically accurate overview of Legg-Calvé-Perthes disease management will also find it highly valuable. 📚 RELATED TOPICS: Developmental dysplasia of the hip (DDH) · Slipped capital femoral epiphysis (SCFE) · Paediatric avascular necrosis management · Salter innominate osteotomy technique · Femoral varus derotation osteotomy · Catterall classification of Perthes disease 🔗 More free orthopaedic teaching at Orthovellum.com — subscribe for weekly videos. 🎨 CREDITS • Original Orthovellum production. ⚠️ DISCLAIMER: Educational only — not individual medical advice. Always consult a qualified clinician for diagnosis and treatment. #PerthesDisease #Orthopaedics #PaediatricOrthopaedics #OrthoVellum #AvascularNecrosis #HerringClassification #PaediatricSurgery #HipSurgery #OrthopaedicSurgery #MedicalEducation #CatterallClassification