Animal Specialty Center


When your pet has been diagnosed with cancer, at Animal Specialty Center we understand how confusing and stressful it is for pet owners. There are many misconceptions and myths about pets with cancer and treatment, especially with chemotherapy. We are here to help and to replace the misconceptions and fear with knowledge and hope. We strive to be a source of information and strength for your pet and your family.

Why a Board-certified Veterinary Oncologist? Boarded oncologists have extensive training, including specialized internships and residencies, and must pass rigorous examinations to achieve their certification. Because their focus is exclusively devoted to the treatment of cancer, your pet is likely to have a better outcome when managed from the start by an oncologist.

Why Animal Specialty Center? In addition to your medical oncologist, our facility has a team of specialists, including surgical and radiation oncologists, as well as a wide range of other specialists, who can assist in the treatment and care of your pet.

Why the Oncology Service at Animal Specialty Center? We are experts at diagnosing and treating cancer because our sole focus is cancer. Our service tailors the treatment protocol for your pet's specific cancer and potential concurrent medical conditions to optimize the outcome and minimize side effects. We want your pet to not just live as long as possible, but to live well. The goal is for patients to have fewer complications and lead normal, happy lives.

Services we provide for your pet:

  • Chemotherapy
  • Melanoma vaccine
  • Advanced imaging: - digital radiography, CT, MRI
  • Consultation for radiation therapy, including CyberKnife Radiosurgery
  • Pain management
  • Nutritional support
  • Acupuncture
  • Email exchange
  • Bereavement programs and support
  • 24-hour emergency care

       Dr. Karen Oberthaler with her dog Dewey

Working with your family veterinarian - We work in concert with your family veterinarian, who manages your pet's general care, and continually provide him/her with updates regarding your pet's treatment at Animal Specialty Center. Our Medical Oncology Service offers expertise and compassion in treating your pet's cancer. For further information, please telephone us at 914-457-4000.

What Is A Veterinary Oncologist?
A board certified veterinary oncologist is a veterinary internal medicine specialist who has also obtained additional training in veterinary oncology. A veterinary oncologist has specialized knowledge in the diagnosis of cancer, the staging of tumors, the development of treatment plans, and the administration of chemotherapy. When your pet is faced with cancer, a veterinary oncologist will typically work in concert with your pet's general practitioner veterinarian in order to obtain the best possible medical outcome for your pet. A veterinary oncologist can help your pet by developing treatment plans that incorporate one or all of the following options:

  • Surgery
  • Radiation
  • Chemotherapy
  • Immunotherapy

While your general practitioner veterinarian can diagnose and treat many health problems, certain diseases like cancer require the care of a doctor who has had specialized, intensive training in veterinary oncology.

Why Does My Pet Need A Veterinary Oncologist?
Just as in humans, a pet with cancer typically needs the help of an oncologist to help diagnose and treat the disease. Veterinary oncologists determine the most appropriate course of treatment and coordinate the treatment program for pets with cancer. They also frequently serve as consultants to veterinarians in private practice to ensure that their patients receive the best treatment possible for their cancer. You can be assured that a veterinarian who refers you and your pet to a veterinary oncologist is one that is caring and committed to ensuring that your pet receives the highest standard of medical care for his or her illness.

While in some cases, your veterinarian may be able to simply consult with the veterinary oncologist about your pet's care, in other cases it is necessary to actually refer you and your pet to the veterinary oncologist for more advanced diagnostics and treatment. Board certified veterinary internists/oncologists may also have access to specialized diagnostic or treatment tools that a general practitioner veterinarian may not have.

My Pet Has Cancer. Now What?
Cancer does appear to be becoming more common in pets, most likely because they are simply living longer. The most important point to realize about this dreaded disease, however, is that just as in people, many forms of the disease can be easily treated, managed, and even cured. Early detection and specialized care are leading to increased survival and cure rates in almost all the types of cancers that afflict pets. From surgery to chemotherapy to radiation therapy, veterinary cancer specialists can offer your pet the very latest diagnostic and treatment options and the best chance of survival. With optimal treatment, cancer in many cases simply becomes another manageable chronic disease.

If your pet is diagnosed with cancer, it is important not to become overwhelmed. Ask your veterinarian to write down the most important points for you to review later. Although the disease is serious, treatment decisions generally do not need to be made quickly. If your pet is diagnosed with cancer, however, you will either want to have your general practice veterinarian work in consultation with a veterinary oncologist, or be referred to one of these specialists for your pet's treatment.

  • Common Cancers
  • Skin tumors
  • Mammary tumors
  • Lymphosarcoma
  • Endocrine tumors
  • Osteosarcoma
  • Hemangiosarcoma

Will My Regular Veterinarian Still Be Involved?
In most cases, your regular veterinarian will still supervise your pet's veterinary care and will work in tandem with the veterinary oncologist, veterinary radiation oncologist, and any other members of your pet's veterinary health care team.

Karen Oberthaler, VMD
Diplomate, American College of Internal Medicine (Oncology)

Office Hours: Monday - Thursday 9am - 6pm

Please call 24 hours in advance during office hours for all medication and food refills.
Dr. Oberthaler's Service Coordinator is Vivian Figueroa.

Frequently Asked Questions

What Additional Training Does A Veterinary Oncologist Have?

Any veterinarian who wants to specialize in oncology must first be certified as an internal medicine specialist. Veterinarians who want to become board certified in internal medicine must seek additional, intensive training to become a specialist and earn this prestigious credentialing. Specialty status is granted by the American College of Veterinary Internal Medicine (ACVIM). A veterinarian who has received this specialty status will list the initials, 'DACVIM,' after his or her DVM degree. Or, the veterinarian may indicate that he or she is a 'Diplomate' of the ACVIM. The word 'Diplomate' typically means the specialist has achieved the following:

• Obtained a traditional 8 year veterinary degree (four years of college plus four years of veterinary school).

• Completed an additional three to six years of advanced training, including a residency at a veterinary teaching hospital where the veterinarian will have trained with some of the best experts in the field and obtained hands on experience.

• Completed the credentialing application process established by the ACVIM

• Passed a rigorous general examination.

Once a veterinarian is board certified in internal medicine, he or she may seek additional specialty status in veterinary oncology. Internal medicine specialists must obtain additional training in this area and sit for a second, even more intensive examination. These doctors will list their credentials after their boarded status, for example, as 'DAVCIM (Oncology).'

When your pet needs the care of a veterinary internal medicine specialist/veterinary oncologist, years of intensive training and additional education will be focused on helping him or her to recover from the disease and/or enjoy the highest quality of life possible.

Will Chemotherapy Make My Pet Sick?

Your veterinary oncologist will give you specific instructions regarding your pet's chemotherapy, but in general, you should be aware that pets typically handle chemotherapy regimens far better than people do. First, as cancer treatment for both humans and small animals has become more sophisticated, the side effects created by chemotherapy regimens have become less severe. Second, chemotherapy administration in animals is less aggressive than it is in humans, so animals typically do not become as sick from the side effects as do people.

Finally, veterinary oncologists have many options at their disposal to help keep your pet comfortable during treatment for his or her disease. From pain management options to special nutritional recommendations to medications that can help lessen the nausea associated with chemotherapy, be assured that veterinary oncologists can keep most pets surprisingly comfortable during treatment. In fact, one of the biggest hurdles to treating pets with cancer is that many owners imagine their pet's treatment will be more difficult than it really is.

What are Cancer Treatment Methods?

The goal of cancer therapy is to destroy abnormal cancer cells while sparing normal cells. An important difference in human vs. animal oncology is that the goal with humans, due to our extended life spans, is to cure the disease. In animals, the goal is more to extend the length of life while still maintaining its
quality. In many cases, a veterinary oncologist will combine some or all of the treatment options outlined below in order to provide the very best outcome for your pet.

• Surgery

• Radiation Treatment

• Chemotherapy

• Immunotherapy

Services Offered in Oncology

Veterinarians in Oncology


General Practice

We have over 600 animal hospitals in 41 states and 4 Canadian provinces that are staffed by more than 3,000 fully-qualified, dedicated and compassionate veterinarians, with more than 400 being board-certified specialists.

The nationwide VCA family of general practice hospitals give your pet the very best in medical care, providing a full range of general medical and surgical services as well as specialized treatments such as wellness, spay/neuter, advanced diagnostic services (MRI/CT Scan), internal medicine, oncology, ophthalmology, dermatology, cardiology, neurology, boarding, and grooming. Services may vary by location.

Our family of pet hospitals stands out by delivering the greatest resources in order provide the highest quality care available for your pets. By maintaining the highest standards of pet health care available anywhere, we emphasize prevention as well as healing. We provide continuing education programs to our doctors and staff and promote the open exchange of professional knowledge and expertise. And finally, we have established a consistent program of procedures and techniques, proven to be the most effective in keeping pets healthy.

Find a VCA General Care Animal Hospital near you:


See all VCA Animal Hospitals >


Emergency Care


TEL: 914-457-4000

Click here for directions to our location.

Animal Specialty Center is a fully-equipped 24/7/365 emergency hospital serving communities in and surrounding lower Westchester. If you suspect your pet may be having a medical crisis, we have a staff of top veterinarians, technicians and client care specialists prepared to handle all pet medical emergencies.

Our Emergency and Critical Care units can assist in all of the following situations requiring immediate medical attention: Auto accidents, traumatic injuries (fractures, bites, burns, lacerations, wounds), respiratory emergencies (choking, difficulty breathing), vomiting, diarrhea, difficulty urinating/defecating, shock, loss of consciousness, dizziness, staggering, tremors, seizures, paralysis, toxic reactions, poison ingestion, labor and delivery problems, blood in urine or feces, swollen, hard, painful abdomen, heatstroke.