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Physical exam for patellar tracking disorder

A physical exam for knee problems includes assessment for patellar tracking disorder. Your doctor will observe you in the following situations.

  • As you stand and walk, your doctor will watch for:
    • Signs that a kneecap is not in a normal position or moving out of place, toward the outer side.
    • Any abnormal movements of your body, such as an unusual gait, that may be contributing to a knee problem.
  • While you're sitting with your knees bent over the edge of the exam table, your doctor will:
    • Determine whether your kneecaps are positioned properly. Normally, the kneecap faces forward, centered over the middle of the thighbone when viewed from the front. A kneecap out of place most frequently faces upwards and is tilted off-center toward the outside of the leg.
    • Watch as you straighten your legs, to check for sideways kneecap movement. Normally, the kneecap moves slightly toward the outside just as the leg straightens. A kneecap out of place is likely to shift noticeably.
    • Watch as you bend your straightened legs halfway (45-degree angle) down to the floor, to check your lower thigh muscle (quadriceps) strength. Normally, the quadriceps help anchor the kneecap. Weak quadriceps often contribute to patellar tracking disorder.

Next, your doctor will:

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  • Feel the kneecap as you bend your knee, to check for possible cartilage problems underneath the kneecap.
  • Press on the areas around your kneecap, to assess for tendon, muscle, or other soft tissue problems.
  • Move your leg(s) in various directions, to check for pain and stability of the knee and to assess the range of motion. These movements are also used to check the degree of tightness in the:
    • Knee ligaments.
    • Hamstrings.
    • Iliotibial (IT) band.
    • Thigh muscles (quadriceps).
    • Hips.
    • Achilles tendon at the base of the heel.
  • Examine your hips, feet, and ankles to look for problems that may contribute to knee symptoms and to check how nerves and blood vessels in the leg are working. This part of the physical exam may possibly include X-ray imaging.
By Healthwise Staff
Primary Medical Reviewer William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer Patrick J. McMahon, MD - Orthopedic Surgery
Last Revised January 19, 2010

WebMD Medical Reference from Healthwise

Last Updated: January 19, 2010
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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