I'm wondering if any of you may know what would cause a dent/valley in a quad muscle (not natural muscle shape)? I have a 3-4 inch long (horizontal across the left quad) and about an inch wide dip that has recently shown up on my leg. I have never injured the leg, or severely strained the muscle. It has never shown any pain, nor have I lost any strength in it. You can see the dent while standing...and it can drastically be felt when running a hand down the leg. It is about 1/3rd of the way down the quad from the hip. I've done a lot of research on this online, found about 20 other people with the same problem...but those that have gone to the doctor about it have all heard that they have never seen it before as a response. I'm pretty fit, not at all over weight, so I don't think that is it at all...I'm really perplexed by this and wonder if anyone else has heard/see this before? It almost looks like the muscle has been cut in half for a visual. Again...I've NEVER injured this muscle in the past.

Any ideas?