Dr. Karen Oberthaler is a Diplomate of the American College of Internal Medicine, Oncology. She graduated magna cum laude from the School of Veterinary Medicine of the University of Pennsylvania in 2002. Following graduation she completed a rotating internship in Small Animal Medicine and Surgery at the Animal Medical Center in New York City. She then returned to the University of Pennsylvania for an Oncology residency, which she completed in 2006. Dr. Oberthaler joined Animal Specialty Center in late 2014. Her clinical interests include lymphoma, osteosarcoma, mast cell tumors, hemangiosarcoma, bladder cancer, and palliative care.