Update to 20 mo. old GSD w/tumor-Probable Brown Recluse Bite!
Vet called this AM with the biopsy results. He really thought that it was either a histiocytoma or mast cell tumor, BUT it turned out to be a spider bite!
He thinks it is probably from a brown recluse.
I am so grateful that I went to the emergency vet and didn't wait until the next day. I am generally a 'wait and see' type and although this didn't appear to be 'life threatening' it looked odd and came on so quickly that I didn't wait.
I have never seen anything quite like it.
This weekend we are going to get everyone out of here, including the dogs, and spray everywhere there could be spiders hiding.