I'm back and sadly smarter reading Zef's messages then from my appointment today.
The ortho doc said that it was odd since after palpating the knee and leg in that area, I genuinely only have discomfort and not actual pain. The meniscus is presumably fine. He is of the mindset that it is either leaked synovial fluid, a hematoma, or a "bunching of the muscle". He said that he would like a simple x-ray first since it will show if there is a fluid build up (like a Baker's cyst that someone mentioned above) or possible vascular issues.
I already had the x-ray done and dropped off the CD to his office. They ordered it stat so hopefully it will be read sometime today. I have another appointment tomorrow at 415pm where he will "hopefully be able to drain it if it's simply fluid" or order a more appropriate scan. I assumed he meant an MRI and then I inquired if an U/S can be done instead and he said yes.
He said the odd part is that there is slight sensitivity exactly where I pointed to having injured it, but that is still not sufficient enough to explain a strain or a tear based on what he saw and felt.
I will again update you all once he sees the x-ray. I almost wish he had simply ordered the correct scan right away since it doesn't sound like a basic x-ray will provide much information. For my appointment tomorrow, the sports medicine doctor will also be there along with ortho. They seemed a little more intrigued then I wanted them to be.
Is the Doc you visited named Dr. Obvious?
He sent you for an x--ray to see if there is fluid in the area...fluid = swelling...that was already confirmed...an x-ray will not show anything about the soft tissue and won't indicated what kind of fluid it is. He also told you it was "odd" that you have sensitivity "exactly" where you "injured" it.
I am not sure why you want ultrasound. An MRI will have much more detail and will be the more definitive diagnostic tool....a good Ortho doc will want an MRI of the injured area whether or not an ultrasound is done and whether or not the ultrasound indicates anything.
What makes it hard to make an assessment over the interwebs is that it is not a good forum to obtain a good history or really have a dialogue about the nature and location of your discomfort and anything else associated with the injury such as restricted movement, etc. There are also special tests that need to be performed to check the stability of the joint and what muscles are involved...for example pain upon plantar flexing the foot against resistance with the knee bent as oposed to the knee not bent can rule out certain muscles and indicate more specifically which ones may be involved. Palpating the injury can tell quite a bit as well. There are some basic questions that on their own don't necessarily indicate much but combined with a detailed history, and physical evaluation can reveal quite a bit...then the diagnostic imaging is used to confirm the assessment as a diagnosis.
The good news is that if you had ACL, PCL, MCL, or LCL tear, particularly one with resultant instability, the doc would have most likely indicated that because it would have been noted when he checked the stability of the knee.
A bakers cyst (which can be caused by leaked synovial fluid), a hematoma due to a rupture of muscle fibers (strain/tear) are strong candidates based on what you have provided here.
As I indicated in my initial post, there are a lot of possibilities....many of them are treated the same regardless of the actual diagnosis.
It will be interesting to know what the definitive diagnosis is. In the mean time keep your leg elevated, especially at night and stay off it as much as possible until you know that your normal activities wont make it worse.
-Z