What is acetabular Protrusio?

Acetabular protrusio is defined radiographically as migration of the femoral head medial to Kohler’s line (a line from the lateral border of the obturator foramen to the medial border of the sciatic notch).

How is acetabular Protrusio treated?

Total hip arthroplasty is the recommended treatment for the older adult with protrusio acetabuli and degenerative changes.

Is acetabular Protrusio painful?

Protrusio acetabuli is a rare pathologic morphology of the hip in which the femoral head protrudes into the true pelvis [48]. It is a reported cause of hip pain and osteoarthritis in young adults [21].

What causes acetabular protrusion?

Acetabular protrusion most commonly occurs as a chronic erosion of the acetabulum in patients with osteoporosis or other disease of the bone (e.g., osteomalacia, ankylosing spondylitis). Also, as in the case of acute trauma, force transmitted through joint can cause failure of acetabular integrity.

How common is acetabular Protrusio?

Protrusio acetabuli (arthrokatadysis or Otto pelvis) is a relatively rare condition associated with secondary osteoarthritis of the hip.

What is Protrusio of hip?

Protrusio acetabuli is a condition of the hip where there is medial displacement of the femoral head into the pelvis and the medial aspect of the femoral head lies medial to the ilioischial line.1 Protrusio acetabuli could be primary or secondary.

How is protrusio acetabuli detected?

Protrusio acetabuli is identified on anteroposterior (AP) radiographs of the pelvis with an acetabular line projecting medial to the ilioischial line.

Is protrusio acetabuli rare?

What is coxa Protrusio?

Coxa profunda refers to a deep acetabular socket. Acetabular protrusion is intrapelvic displacement of the acetabulum and femoral head, so that the femoral head projects medial to the ischioilial line.

What is acetabular protrusio?

Acetabular protrusio is an intrapelvic displacement of both the acetabular fossa and femoral head so that the femoral head projects medial to the ilioischial line (i.e., Kohler line) ( Figure 17.1A-C ). In contrast, in coxa profunda, only the acetabular fossa is medial to the ilioischial line (and often considered a “deep acetabular socket”).

What are the symptoms of protrusio acetabuli?

If it is not treated on time, it may lead to complete limb immobility. These are the only symptoms shown by protrusio acetabuli. If it is secondary to any disease, then it occurs as a symptom of that leading cause. The most common cause reported is osteoarthritis. It has two main forms i.e. primary and secondary on the basis of its cause.

What are the causes of secondary protrusio acetabuli?

Whereas secondary protrusio acetabuli may occur as a result of some diseases like marfan syndrome, osteomalacia, Paget disease, rheumatoid arthritis, hip implants and central fraction dislocation. All these diseases can lead to femoral bone head protrusion in pelvic cavity.

What is a protrusio defect?

Protrusio is a central acetabular defect resulting from migration of the femoral head medial to Kohler’s line. Protrusio can develop in association with a number of conditions that affect the metabolism or mechanical behavior of the periacetabular bone.