OK so I've always gotten great input here, so here's another go. Wondering if anyone has any thoughts or input on the following problem. Both an ortho and a physical therapist have come up short in giving me a definitive answer, as it seems my issue is apparently a rare one. Here goes: Short version: pain in outside of my knee, lower half, whenever I straighten out my leg. It isn't a dull, 'muscle' kind of pain. It's a very sharp, needle-like pain. Long version: Been going on for about 3-4 weeks now. First felt it getting out of a very tight parking space while I was holding onto something, so I was twisting up and out of my car with pretty much all of my weight on that left leg initially, and as I twisted up, it hurt, though I wasn't on the ground or anything, I could still walk but it was just a little sore. In the subsequent weeks this dull pain has remained, not getting better, not getting worse, and I've even played tennis a couple times and the tennis doesn't seem to even do anything, as when you're playing the knee is bent and not straightened... But, say, laying down on the bed on my back? That hurts -- anything that puts my leg straight, the pain is very sharp on that outside, lower half.... Finally went to a respected ortho this past week, and honestly, the guy seemed to have no idea. Wants me to do physical therapy for a few weeks to see if it helps, and if the pain is still there, an MRI. Both he and the physical therapist seem to think my tendons, ligaments and knee are very stable, and the pain location isn't necessarily lined up where the meniscus is, either, so it's not likely to be that. Also, there is little to no swelling at all. Doc wasn't even sure what to diagnose it as on the Physical Therapy sheet, so he just put 'anterior knee pain' for now... First PT session involved some sort of 'light' therapy - as in, that device with the ball and some sort of LED light or something that's supposed to stimulate healing? Anyway, I was dubious about this, but the knee is feeling a bit better. Anyway, just wondering if anyone knows what this could be, since I haven't been able to get any true answers from the professionals, which has been frustrating.