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A tear of a meniscus is a rupturing of one or more of the fibrocartilage strips in the knee ... the menisci can be imaged with magnetic resonance imaging (an MRI scan).
Key findings on MRI include: Double PCL sign: The displaced meniscal fragment mimics the appearance of a second posterior cruciate ligament (PCL) on sagittal images. Flipped meniscus appearance: The displaced fragment creates an abnormal signal within the joint in sagittal view.
The double PCL sign is best observed on sagittal T2-weighted or proton density-weighted MRI images. [5] Key features include: [6] Duplicated PCL Appearance: The native PCL appears as a curvilinear low-signal intensity structure in its typical anatomical location.The displaced meniscal fragment appears as a second parallel low-signal structure inferior to the PCL.
The absent bowtie sign is a radiologic sign indicative of a meniscal tear in the knee joint. On sagittal magnetic resonance (MR) images, the body of the meniscus normally looks like a bow tie, with two distinct segments. The absent bowtie sign is present when there is a lack of two segments seen on consecutive sagittal MR images. [1]
Los Angeles Angels star Mike Trout will have surgery to repair a torn meniscus in his left knee, sidelining the three-time AL MVP indefinitely. ... Trout had an MRI after playing in the Angels' 6 ...
The blood flow of the meniscus is from the periphery (outside) to the central meniscus. Blood flow decreases with age and the central meniscus is avascular by adulthood, which slows healing. Menisci show low-intensity on MRI images. [5]
A torn meniscus is commonly referred to as torn cartilage in the knee. Menisci tear in different ways and are noted by how they look, as well as where the tear occurs in the meniscus. Two types of tears include minor, which includes stiffness and swelling within two to three days but usually goes away in two to three weeks.
High quality MRI images (1.5 T magnet or higher [22]) of the knee can be extremely useful to diagnose injuries to the posterolateral corner and other major structures of the knee. [23] While the standard coronal , sagittal and axial films are useful, thin slice (2 mm ) coronal oblique images should also be obtained when looking for PLC injuries.