I've researched this problem quite a bit and have yet to find anything exactly like this. I had my Panasonic LCD TV on my bed when my dog decided to jump up on it and put some paws to the screen. There wasn't any noticeable damage. Later that evening when I connected and fired up the TV, I noticed on pixel out or stuck. The following day, the pixel turned into several pixels all in a little vertical line 1 pixel wide. The day after, the line grew longer. Now it's a couple days later and the line appears to be roughly the same size, but now there are adjacent pixels effected on both sides of the initial line.
I've tried the steps on fixing stuck pixels, using software, applying pressure to the pixels; massaging them etc. nothing has worked. I am wondering if this problem will continue to get worse and is there something I can do to fix it or at least stop the spreading of it.
Also one note. On a black screen the pixels appear to be yellowish and on a light screen they appear blue/green.