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What is Coxa Magna?

Coxa Magna is the asymmetrical enlargement and distortion of the upper end of the thigh bone (femur) causing instability of the hip joint.

What are the Causes of Coxa Magna?

Coxa Magna may be caused by the following conditions:

  • Legg-Calve-Perthes disease, a childhood condition characterized by a temporary lack of sufficient blood supply to the femur
  • Transient synovitis of the hip, an inflammation of the joint lining
  • Developmental hip dysplasia, improper formation of the hip joint
  • Trauma to the hip
  • Septic arthritis/osteomyelitis, a painful infection of the joint or bone
  • Juvenile rheumatoid arthritis, a type of arthritis that affects children under 18 years of age
  • Chronic slipped capital femoral epiphysis, a condition characterized by the head of the femur slipping off the femoral neck

What are the Symptoms of Coxa Magna?

You may experience:

  • Pain that is confined to the hip, groin, and thigh
  • Aggravation of pain with activity
  • Morning stiffness
  • Limited range of motion
  • Limping

Diagnosis of Coxa Magna

Your doctor will review your medical history and symptoms and based on this a physical examination will be performed. Your doctor may also recommend the following diagnostic tests:

  • X-rays: This study uses electromagnetic beams to produce images of the hip and can detect fractures or injuries.
  • MRI Scan: This is an imaging study that uses a large magnetic field and radio waves to detect any damage to the soft tissues.

What are the Treatments for Coxa Magna?

Some of the treatment options include:

  • Rest
  • Anti-inflammatory and pain-relieving medications such as NSAIDs and opioids.
  • Casting or bracing
  • Physical therapy
  • Activity modification

If non-surgical treatments don't work, your child may need surgery. Surgery may be needed depending on the severity of the condition to reshape the femoral head and ensure that it fits snugly into the hip socket.

  • Northern Light Blue Hill Hospital
  • Northern Light Maine Coast Hospital
  • Royal College of Physicians and Surgeons of Canada
  • American Academy of Orthopaedic Surgeons
  • American Association of Hip and Knee Surgeons
  • Eastern Orthopaedic Association
  • Canadian Orthopaedic Association
  •  Orthopaedic Trauma Association