Users' questions

What does avascular necrosis look like on an MRI?

What does avascular necrosis look like on an MRI?

MRI findings of AVN include decreased signal intensity in the subchondral region on both T1- and T2-weighted images, suggesting edema (water signal) in early disease. This relatively nonspecific finding is often localized in the medial aspect of the femoral head. This abnormality is observed in 96% of cases.

What is suspected aseptic necrosis?

Avascular necrosis ultimately leads to destruction of the joint adjacent to the involved bone. The hip is the most common joint affected by avascular necrosis, followed by the knee, shoulder, ankle, elbow, and wrist. Avascular necrosis is also referred to as aseptic necrosis and osteonecrosis.

What condition leads to necrosis of the femoral head?

These causes include fractures, dislocations, chronic steroid use, chronic alcohol use, coagulopathy, congenital causes; among many others. Avascular necrosis of the femoral head is a debilitating disease and is an important condition requiring healthcare professionals to be vigilant for its presentation.

How is AVN of the femoral head detected?

The existing magnetic resonance imaging (MRI) protocol for detection of AVN of the femoral head is taking T1-weighted image (T1WI), T2WI, T2-gradient-echo (GRE) sequences in the coronal plane, T2WI sequence in the sagittal plane and T1WI and T2WI sequences in the axial plane.

How does lack of blood supply cause femoral head deformity?

Lack of blood supply causes necrosis of the femoral head leading to a deformity that puts the patient at high risk of developing osteoarthritis and/or losing range of motion (ROM). This disease progresses through four stages: Initial/necrosis – when blood supply gets disrupted, and necrosis begins

Are there radiologic manifestations of on in the femoral head?

Figure 1a Radiologic manifestations of ON in the adult femoral head in several different patients.

How does the femoral head affect the hip?

As we grow, the internal bone structure of the hip ball or femoral head becomes larger and becomes the main foundation to maintain the spherical shape. Second, children are still growing to include the femoral head.