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Protrusio acetabuli
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Protrusio acetabuli

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Protrusio acetabuli
Specialty Orthopedics

Protrusio acetabuli is an uncommon defect of the acetabulum, the socket that receives the femoral head to make the hip joint. The hip bone of the pelvic bone/girdle is composed of three bones, the ilium, the ischium and the pubis. In protrusio deformity, there is medial displacement of the femoral head in that the medial aspect of the femoral cortex is medial to the ilioischial line. The socket is too deep and may protrude into the pelvis.

Signs and symptoms

Protrusio acetabuli may be asymptomatic. Limitation of joint range of movement is the earliest sign, along with pain.

Classification

Protrusio acetabuli is divided into two types, primary and secondary.

Protrusio acetabuli may also be thought of as unilateral or bilateral.

Prognosis

The protrusio may progress until the femoral neck impinges against the pelvis.

Treatment

Arthroscopic surgery (or open joint surgery) is an effective treatment. Joint replacement surgery may be necessary in the case of severe pain or substantial joint restriction.

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