Almost 4 years ago, Dr. Patterson performed surgery on my dog, Annie a Westie, to remove an insulinoma cancer tumor from her pancreas. He got most of it and estimated it would give her 12 to 18 months of life. Without surgery, her prognosis was two months. Annie recently celebrated her 11th birthday and continues to do well with a low dose of prednisone. Since her surgery, she earned her Championship in Teacup Dog Agility! Now she's retired, naps most of the day. Thank you, Dr Patterson!