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.
Knee locking: Inability to either straighten or bend knee. See detailed information below for a list of 18 causes of Knee locking, Symptom Checker, Assessment Questionnaire, including diseases and drug side effect causes.Â» Review Causes of Knee locking: Causes | Symptom Checker Â» | Assessment Questionnaire Â».nee locking: Symptom Checker. Listed below are some combinations of symptoms associated with Knee locking, as listed in our database. Visit the Symptom Checker, to add and remove symptoms and research your condition.