Interesting... my dog had a tumor 'explode'
Okay, I think this is interesting and since I'd never heard of it, or seen this type of thing, I thought I'd share. I've had a myriad of dogs, horses etc., and have never seen this.
My dog has had a pea-sized, cyst-type thing (or so we thought) on his mid-back, a few inches below his spine, for a couple of years. It didn't bother him, didn't grow, kept forgetting to have anyone look at it. Because he is double coated and has actual fur that is extremely dense, we never could figure out if it was below or above the skin, or even get a really good look at it. Even when he's shaved down, as he is now, his fur is so dense I can't find bare skin to put on Advantage.
Last Thursday, this "thing" all of a sudden was very obvious. Looked like he had scratched it off or irritated it and it had scabbed over, except there was only the slightest blood tinge in the surrounding hair and no blood on the hair on top of this thing. At this point it was about the size of a quarter, irregular, and had some thickness to it. I tried cleaning it off by placing a damp towel on it to get some sense of what it was. I really didn't recall seeing him scratch in that area but he has skin allergies that worsen this time of the year, so I figured anything was possible. But I didn't get the sense it was a scab in the classic sense.
Took him to the vet today, it was the first appointment we could get. He had a subcutaneous benign tumor that had aged to the point it ran out of it's blood supply and when that happens they burst (I believe the vet said aged, as opposed to enlarged). Evidently, when they run out of a blood supply these things rupture. This left him with a dime-sized hole that was a millimeter or so deep (I only saw into the hole when the vet pulled the "roof" back far enough to look into it and it was filled with staph infection, so I couldn't really see how deep it was, he was taken into the operating room to get it cleaned off and cleaned out and when I next saw him it was filled with a powder to stop the bleeding).
The whole situation is no big deal, aside from the resulting staph infection which had not affected my dog systemically (symptomatically)to this point. We have a follow up appointment in two weeks, once the infection has cleared with antibiotics. I guess I can either have the remainder excised or leave it alone, depending on what the vet finds once the infection clears and it hardens off so the vet can get a sense of what's left.
I didn't ask, will try to remember when we go back, but I guess the 'scab' was dead tumor cells. It was weird because when I tried to lift it to see what was under it, the dog didn't even flinch. I would expect had it been a scab attached to the skin, it should have hurt, and this dog is a real chicken. When he even thinks something is going to hurt he starts complaining.
Just thought I'd share this, should anyone else find it interesting.