“ Legg-Calve-Perthes disease is a common idiopathic AVN of the capital femoral epiphysis that is more common in boys between 4 and 8 years o...
“
Legg-Calve-Perthes disease is a common idiopathic AVN of the capital femoral epiphysis that is more common in boys between 4 and 8 years of age. It is bilateral in up to 20%.
PLAIN FILM
• Subchondral lucency is the earliest sign; the ‘crescent sign’.
• In early disease, also look for widening of the medial joint space, a small femoral epiphysis, sclerosis of the femoral head and localised bone demineralisation.
• In late disease, there is fragmentation of the femoral head, subchondral fracture on the anterolateral epiphysis and cysts in the femoral neck.
• Staging:
- – 1—normal radiograph
- – 2—sclerosis and cyst formation
- – 3—loss of structural integrity
NUCLEAR MEDICINE
• Reduced uptake in early disease.
• Uptake is increased in late disease.
Perthes disease. Frontal pelvis radiograph demonstrating subchondral lucency within the right femoral epiphysis (white arrow).
”
- For Radiology Cases, Discussion join: Radiology Made Easy on Facebook
- Subscribe to our youtube channel for FRCR radiology case discussion
- Join our Telegram group: Radiology Made Easy
