Discoid meniscus is a meniscus shape variant where the meniscus is thicker and more “disc-like” than usual. It most often involves the lateral (outer) meniscus of the knee. It can be present without symptoms, or it can contribute to pain, clicking, or tearing. The term is commonly used in orthopedics, sports medicine, and knee imaging reports.

A Parameniscal cyst is a small, fluid-filled pocket that forms next to the knee meniscus. It is often linked to a meniscal tear that allows joint fluid to track outward. It may be felt as a firm bump along the joint line or seen on imaging. The term is commonly used in orthopedics, sports medicine, radiology, and physical therapy notes.

A Meniscal cyst is a fluid-filled sac that forms near or within a knee meniscus. It is commonly associated with a meniscal tear that allows joint fluid to track into nearby tissue. People may notice a small lump at the joint line, along with aching pain or tenderness. The term is used in orthopedics, sports medicine, and knee imaging reports to describe this specific cyst pattern.

Meniscal extrusion means the knee’s meniscus has shifted outward beyond the edge of the tibia. It is usually described on MRI, and sometimes on ultrasound, as a measurement or graded finding. It often appears alongside meniscal tears, meniscal root injuries, and knee osteoarthritis. Clinicians use it to help explain symptoms and to understand how well the meniscus is functioning.

Posterior root tear is a specific type of meniscus injury near the back attachment point of the meniscus in the knee. In plain terms, it is a tear where the meniscus “anchors” to bone, which can change how the knee spreads load. The term is commonly used in orthopedics, sports medicine, radiology (MRI reports), and physical therapy documentation. This overview is informational and focuses on definitions and clinical concepts rather than personal treatment guidance.

Meniscal root tear is an injury to the “root” attachment of the meniscus where it anchors to the tibia (shinbone). It is commonly discussed in orthopedic clinics when evaluating knee pain, swelling, and mechanical symptoms. Because the meniscal root helps the meniscus function like a load-sharing ring, a tear can change knee mechanics. The term is used in sports medicine, physical therapy, and imaging reports (especially MRI).

A Flap meniscus tear is a type of meniscal tear where a piece of the meniscus partly separates and forms a “flap.” It is commonly discussed in knee injury diagnosis, MRI reports, and arthroscopy findings. It can occur in the medial or lateral meniscus and may cause catching or sharp pain with motion. Clinicians use the term to describe tear shape and stability, which can influence treatment planning.

A Complex meniscus tear is a meniscus injury with more than one tear pattern in the same area. It commonly involves fraying, splitting, or multiple tear directions that make the tissue less stable. It is a clinical and imaging term used in orthopedics, sports medicine, and radiology. It helps describe why knee pain, catching, swelling, or reduced motion may occur.

A Horizontal meniscus tear is a split within the meniscus that runs parallel to the tibial surface. It can separate the meniscus into an upper and a lower layer (often called “leaflets”). It is commonly discussed in orthopedic clinics when evaluating knee pain, swelling, and mechanical symptoms. It is also a frequent MRI finding, especially in adult and older patients.

A Radial meniscus tear is a specific tear pattern in the knee’s meniscus cartilage. It runs from the inner free edge of the meniscus toward the outer rim, like a spoke in a wheel. Clinicians use this term to describe what the tear looks like and how it may affect knee mechanics. It is commonly discussed in sports medicine, orthopedics, and physical therapy when evaluating knee pain and catching.