My dog has a bladder tumor. Is it possible it's benign, not cancer?

Question

My 6 year old neutered male has a large tumor in his bladder. He was finally diagnosed after an ultrasound. Blood work before ultra sound never gave any warning of cancer. Cytology report from his urine also did not confirm cancer, only suspicious cells. Is it possible it’s benign? I’ve read online where pets have been diagnosed with TCC but opted to have the tumor removed then the biopsy comes back benign. Since no test have confirmed malignant, is it possible it’s not? Pet's info: Dog | American Pit Bull Terrier | Male | neutered | 6 years old | 90 lbs

Ricardo Fernandez, DVM · Accepted Answer

Thanks for using Petco Pet Education Center, formerly Petcoach! Thanks for such detailed information. Cytology is rarely diagnostic for this disease so I would still be suspicious that a malignant tumor such as TCC is much more likely. This is because of what you described but also due to the fact that this is way more common than benign tumors of the bladder. There is a test that your veterinarian could consider which is easy to perform and is non-invasive. This is also very sensitive and specific meaning that typically a negative or a positive result can be trusted. This is called the BRAF test which is performed with a urine sample. Good luck and have a great day!

My dog has a bladder tumor. Is it possible it's benign, not cancer?

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