| 1. |
Osteoarthritis: |
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Is caused by degeneration of cartilage in the knee. |
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The painful knee that is often more painful with |
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activity. |
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| 2. |
Rheumatoid arthritis: |
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Typically affects many joints often including the |
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knee. People who have this disease often have |
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family members who suffer from it as well. Patients |
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may also complain of morning stiffness greater than |
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30 minutes and pain in other joints. |
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| 3. |
Crystalline arthritis (gout and pseudogout): |
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Is arthritis caused by sharp crystals that form in the |
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knee and other joints. These crystals can form as a |
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result of defects in the absorption or metabolism of |
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various natural substances such as uric acid (which |
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produces gout) and calcium pyrophosphate |
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(pseudogout). |
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| 4. |
Bursitis: |
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A fluid filled sac in the knee gets inflamed as a result |
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of trauma, infection, or crystalline deposits. A |
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common bursitis is prepatellar bursitis and commonly |
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occurs in people who work on their knees. It is often |
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referred to as housemaid’s knee or carpet layer’s |
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knee. Another type of bursitis is anserine bursitis |
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which is located about 2 inches below the knee along |
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the inner side of the knee and is often worse with |
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bending the knee or at night with sleep. |
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| 5. |
Infection (infectious arthritis): |
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A common organism is Gonorrhea. Knee Infections |
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cause painful knee swelling, fevers and chills. |
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| 6. |
Patellofemoral syndrome and chondromalacia |
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patella: |
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Caused by patellar mistracking. In patellofemoral |
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syndrome, the patella rubs against the inner or |
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outer femur rather than tracking straight down the |
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middle. The knee pain is usually worse with activity |
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and prolonged sitting. As the condition progresses, |
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degeneration of the articular cartilage on the |
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underside of the patella occurs which is called |
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chondromalacia patella. |
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| 7. |
Jumper’s knee: |
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Quadriceps tendonitis or tendonitis of the patellar |
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tendon typically seen in basketball players, volleyball |
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players, and other jumping sports. Jumper’s knee |
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causes localized pain that is worse with activity. It |
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usually hurts more as you jump up than when you |
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land because jumping puts more stress on tendons |
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of the knee. |
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| 8. |
Osgood-Schlatter disease: |
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Occurs in adolescent athletes where repetitive |
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extension of the knee causes inflammation and |
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injury of the tibial tubercle. Pain is typically a couple |
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of inches below the knee where the patellar tendon |
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attaches and is worse when extending the leg. The |
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tibial tubercle is tender to touch and over time begins |
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to protrude more because the chronic inflammation |
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stimulates the bone to grow. |
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| 9. |
Iliotibial band syndrome: |
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Inflammation of a fibrous ligament that extends from |
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the outside of the pelvic bone to the outside of the |
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tibia. When this band is tight it may rub against the |
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bottom outer portion of the femur. This pain is |
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commonly seen in distance runners, is outside knee |
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pain, and will typically come on 10-15 minutes into a |
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run and improve with rest. |