How can MRI help determine if a juxtaarticular cyst is paralabral

What causes a paralabral cyst, and how can MRI help determine if a juxtaarticular cyst is paralabral?

Paralabral cysts form as a result of a labral tear, either traumatic or degenerative in nature, and may communicate with the tear anywhere along the labrum. The tears most commonly affect the anterior labrum, while the cysts are usually located lateral to the anterosuperior or posterosuperior labrum. The normal labrum in cross-section appears as a triangle of low signal intensity on MRI, and a labral tear is seen as a linear or irregular fluid signal intensity focus extending through the substance of the labrum, or, in cases of labral detachment, as fluid signal intensity between the labrum and the acetabulum (see Figure 55-5, ). This abnormal fluid can expand the labrum and extend to its surface and beyond, forming a paralabral cyst. In many cases, a neck of the cyst can be traced to the labral tear ( Figure 55-5, ), and presence of a paralabral cyst is highly suggestive of a labral tear. These cysts can range in size up to several centimeters, can be simple or septated, and may have an intraosseous component extending into the acetabulum

15585

Sign up to receive the trending updates and tons of Health Tips

Join SeekhealthZ and never miss the latest health information

15856