There are a number of potential causes of Hornerâs syndrome, each affecting a different place in the sympathetic chain: 1  First order neuron lesion: brainstem stroke. 2  Second order neuron lesion: apical lung tumor, neck trauma, other. 3  Third order neuron lesion: orbital trauma or inflammation, carotid dissection, other.
In very severe cases where the patella keeps dislocating, the attachment of the patellar tendon may also have to be moved. Once the surgery heals, the patella will track up and down in the patellar groove, reducing pressure on the articular cartilage. 1  Knee Pain: Symptoms, Causes, and Treatments.
3) Lateral Meniscus Tear. What is it: Tear in the cartilage lining on the outer side of the joint. It is the least common knee ligament to get injured. Symptoms: Lateral knee pain, swelling, locking, instability, difficulty straightening the knee. Causes: Sudden knee twisting on a bent knee and planted foot or wear and tear.