Left Acetabular Roof

August 17 2020.

Left acetabular roof.

The angle is formed by a horizontal line connecting both triradiate cartilages hilgenreiner line and a second line which extends along the. Mary mcmahon last modified date. The majority of acetabular fractures are caused by some type of high energy event such as a car collision. There are three bones of the os coxae hip bone that come together to form the acetabulum.

Contributing a little more than two fifths of the structure is the ischium which provides lower and side boundaries to the acetabulum the ilium forms the upper boundary providing a little less than two fifths of the structure of the acetabulum. Sbcs occur in the subchondral bone which is the layer of bone right under cartilage. The acetabulum is an articular surface it articulates with the femoral head says stephen andy a. Acetabulum fractures can involve one or more of the two columns two walls or roof within the pelvis.

The acetabular angle is a radiographic measurement used when evaluating potential developmental dysplasia of the hip ddh. Sbcs were first discovered in 1940s but doctors are still uncertain about the reasons they form. It is most useful in patients who have started to ossify the epiphysis since ossification diminishes the usefulness of ultrasound. If an acetabular fracture is identified a ct scan is suggested to assess the position of the fracture fragments and to exclude intra articular loose bodies.

Fractures occur in a bimodal distribution. Sems m d an orthopedic trauma surgeon at mayo clinic s campus in rochester minnesota. This occurs in people under 30 and typically appears in the long arm bone or the humerus. A bone island is a benign growth of bone or cartilage inside a bone usually within the marrow.

These hip socket fractures are not common they occur much less frequently than fractures of the upper femur or femoral head the ball portion of the joint. The addition of oblique views of the affected hip may be necessary to evaluate the anterior and posterior columns of the acetabulum. An acetabular fracture is a break in the socket portion of the ball and socket hip joint. High energy trauma in younger patients e g motor vehicle accidents low energy trauma in elderly patients e g fall from standing height pathoanatomy.

It shows up on a medical imaging study such as an x ray as a point of increased density and is believed to be caused by overproduction of bone or cartilage cells. The rest is formed by the pubis near the mid. A benign cause of a lytic bone lesion is a solitary bone cyst as noted on the norwich image interpretation course. 2012 farlex inc.

The acetabular lines should be carefully scrutinized.