Patellofemoral : Sounds like it may be patellofemoral syndrome. It is usually aggravated by sitting for long periods. It's called a "theatre sign". Numbness is an odd complaint but anything is possible.
Answered 11/15/2013
4.7k views
Many causes: Many possibilities. Often related to knee instability. Have knee medial-lateral stability checked. Then ? Rheumatologist or orthopedic surgeon.
Answered 9/24/2018
4.7k views
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