Gold, The real deal though was that a 12 Yr Westhighland terrior with Addisons is the same as a 84 year old human with terminal cancer.
The question posed to the Vet was a good question if asked many months or years prior to this terminal cancer episode (stage x + 1,2,3,4). The caregiver waited too long.
RECAF could be useful to monitor recurrence, but from what was stated, the example corresponds to a dog that is in the terminal phase of the disease and with a very aggressive type of cancer. This situation is akin to having a terminal patient with a massive abdominal tumor that was diagnosed as an inoperable colorectal carcinoma, metastases in the liver, etc and concluding that CEA is useless because the doctor would not use it in that patient...