Coxa magna deformity and Legg-Calvé-Perthes
Left hip pain.
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Frontal radiograph of the pelvis and hips reveals a short broad femoral head (black arrow) and a relative shortening of the left limb (compare levels of lesser trochanters (yellow arrows) in keeping with a coxa magna deformity in this patient with know Legg-Calve-Perthes (LCP) as a child.
Coxa magna is a result of insult to the femoral head or epiphysis in childhood. Coxa magna deformity is a late radiographic finding in this patient with Legg-Calve-Perthes. Patients with Legg-Calve-Perthes is at risk for developing early osteoarthritis (OA) and femoral acetabular impingement (FAI).
Differential Diagnosis :
- Madan S, Fernandes J, Taylor JF. Radiological remodelling of the acetabulum in Perthes' disease. Acta Orthop Belg. 2004;69 (5): 412-20. Pubmed citation
- Rowe SM, Moon ES, Song EK et-al. The correlation between coxa magna and final outcome in Legg-Calve-Perthes disease. J Pediatr Orthop. 2005;25 (1): 22-7. Pubmed citation