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Knee

Quad Tendon Patella Tendon Injuries

Tendon injuries around the knee can be painful and limit movement, especially for active individuals. The quadriceps tendon and patellar tendon play a vital role in how the knee functions. When injured, they can cause difficulty walking, running, or even standing up from a seated position.

The quadriceps tendon is a strong band of tissue that connects the quadriceps muscles in the front of the thigh to the top of the kneecap (patella). This tendon helps straighten the knee and is essential for movements like walking, jumping, and climbing stairs.

The patellar tendon runs from the bottom of the kneecap (patella) to the shinbone (tibia). It works together with the quadriceps tendon to allow the knee to straighten. It is often called a tendon, but it also acts as a ligament since it connects bone to bone.

Both the quadriceps tendon and patellar tendon can be strained or torn due to sudden force, overuse, or underlying medical conditions.

  • Quadriceps tendon injuries often occur when a person lands from a jump, stops suddenly, or falls on a bent knee. These injuries are more common in middle-aged individuals, especially those who play sports involving jumping or running.
  • Patellar tendon injuries typically happen in younger athletes who engage in sports like basketball, volleyball, or soccer. Over time, repeated stress on the patellar tendon can cause small tears, leading to a condition called patellar tendinitis, also known as “jumper’s knee.”

  • Weak or imbalanced thigh muscles, which put extra strain on the tendons
  • Tight leg muscles, especially the quadriceps and hamstrings
  • Overuse from repetitive jumping or running
  • Aging, as tendons become weaker over time
  • Medical conditions, such as diabetes or rheumatoid arthritis, which affect tendon health
  • Certain medications, such as corticosteroids or fluoroquinolone antibiotics, which can weaken tendons

  • Pain above the kneecap, especially when trying to straighten the leg
  • Swelling and bruising around the knee
  • A popping sensation at the time of injury if the tendon is torn
  • Weakness or difficulty walking
  • A noticeable indentation above the kneecap if the tendon is completely torn

  • Pain below the kneecap, especially during activity
  • Swelling and tenderness in the front of the knee
  • Difficulty straightening the knee or bearing weight
  • A popping sound or sudden pain if the tendon ruptures completely
  • A gap below the kneecap if the tendon is fully torn

To properly diagnose a quadriceps tendon or patellar tendon injury, Dr. Boden will perform thorough physical exam and review imaging studies. She will check for swelling, tenderness, and gaps in the tendon. She may also test knee strength and range of motion by asking the patient to straighten their leg. If the knee cannot be fully extended, it may suggest a tendon tear.

If a tear is suspected, imaging tests can provide a clearer view of the injury:

  • X-rays – While tendons do not show up directly on an X-ray, these images can help identify if the kneecap has moved out of place, which happens when a tendon is completely torn.
  • Ultrasound – This test uses sound waves to create real-time images of the tendon and can show if there is a partial or complete tear.
  • MRI– This detailed scan provides a clear view of soft tissues like tendons and can confirm the extent of the injury.

Quadriceps and patellar tendon injuries can cause significant pain and difficulty with movement. If left untreated, they may worsen over time and lead to long-term weakness or instability. Prompt diagnosis and treatment by a specialist like Dr. Stephanie Boden at the University of Louisville, can help patients regain knee function and return to their activities safely. Schedule a consultation with an expert today to learn more about your condition and all your treatment options.

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