Patellofemoral pain syndrome
Pain around or behind the kneecap related to how it tracks during bending, common among runners, cyclists, and young active individuals.
Knee conditions span a wide range, from overuse-related pain around the kneecap in younger, active individuals to degenerative osteoarthritis in older adults, with ligament and meniscus injuries most common during sport.
Because the knee is examined and treated separately from a suspected ACL tear on this site, this section focuses on the broader range of knee conditions beyond ligament rupture specifically.
Relative clinical burden
Patellofemoral pain syndrome60
Knee osteoarthritis55
Meniscus tear35
Patellar tendinopathy30
Iliotibial band syndrome25
Collateral ligament sprain20
Common conditions
Knee osteoarthritis
Gradual degeneration of joint cartilage, most common in older adults, producing pain, stiffness, and reduced function that typically progresses over months to years.
Meniscus tear
Damage to one of the C-shaped cartilage cushions, occurring from acute twisting injury in younger individuals or gradual degeneration in older adults.
Patellar tendinopathy
Overuse-related irritation of the tendon connecting the kneecap to the shin bone, common in jumping sports and often called jumper's knee.
Iliotibial band syndrome
Pain at the outer knee related to irritation where the iliotibial band crosses the joint, frequently seen in runners and cyclists during periods of increased training.
Collateral ligament sprain
Stretching or tearing of the ligaments at the inner or outer knee, often from a direct blow or sideways stress during contact sport.
Given the range of tissues that can be involved, knee assessment typically considers the pattern of pain location, activity triggers, and any history of trauma to help narrow the likely diagnosis.
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