Unfortunately Blurtit does not have dog tumor pictures, but they can be found online via search engines or on specific animal healthcare sites. However, these pictures have limited use. If your dog has a cancerous tumor then theirs will not look the same as another - they are all different. Seeing another tumor will not be relevant; it cannot aid in treatment, it might not match your dog's severity of cancer, and it could be a different form of cancer in a different location.
This page -
http://www.organic-pet-digest.com/canine-tumors.html - discusses canine tumors.
A tumor is a growth. It is the rapid production of cells that serve no function in the body. It is cancer, but there are two types: Benign and malignant. A benign tumor exists in a very localized area and has little chance of spreading. Whilst it is excess growth, it isn't at a rapid rate. A malignant tumor grows quickly and aggressively progresses through the body.
It is technically a form of mutation for the body to produce excess cells at such a rapid rate. It is common in old age because of deterioration in the body and the weakened state of natural bodily functions, such as repair.
If the tumor is caught early enough then a vet can simply remove it, depending on the size. A small, benign tumor is a simple operation and can require only minor anesthetic, whilst a larger, malignant tumor would require full sedation. Not all dogs can be saved though. Smaller dogs are harder to operate on, due to the effects of the anesthetic. The cancer can also be too far advanced to consider the operation. This is often the case with older dogs.
