Ann Hohenhaus,

DVM, DACVIM (SAIM, Oncology)
Role: Senior Veterinarian
Specialist in Oncology
Director of Pet Health Information
Department: Oncology
Dr. Ann Hohenhaus of the Animal Medical Center in New York City

Dr. Ann Hohenhaus is a third-generation veterinarian, double board-certified in Oncology and Small Animal Internal Medicine. As AMC’s Director of Pet Health Information, she writes AMC’s weekly blog, hosts a monthly “Ask the Vet” podcast, which has been ranked #4 on Feedspot’s 45 Top Pet Podcasts, and regularly speaks to national news media about animal health. In addition, she has contributed widely to research articles and textbooks, lectures internationally, and has won prestigious awards for her work in both veterinary medicine and journalism. In 2021, she joined the influential World Small Animal Veterinary Association’s Oncology Working Group, which she currently chairs.

Dr. Hohenhaus is an active participant in AMC’s research mission and has written extensively in the veterinary literature. She is listed as an author on numerous publications in PubMed in the disciplines of oncology, internal medicine, and transfusion medicine, including: squamous cell carcinoma, mast cell tumors, melanoma, exocrine pancreatic insufficiency, and anemia. She authored many veterinary textbook chapters and is currently investigating immunotherapy for hemangiosarcoma in dogs. Dr. Hohenhaus lectures nationally and internationally, most recently in the Lima, Peru and Lisbon, Portugal.

In her spare time, Dr. Hohenhaus raises foster kittens as a member of the ASPCA Foster Kitten Team.

Board certifications:


  • BS, with honors, Phi Beta Kappa, St. Mary’s College of Maryland, St. Mary’s City, Maryland
  • DVM, Cornell University, Ithaca, New York

Recent Publications:

Hohenhaus AE. Improving access to advanced veterinary care for rescued cats and dogs. J Feline Med Surg. 2023 Dec;25(12):1098612X231211755. doi: 10.1177/1098612X231211755. PMID: 38108092.

Hohenhaus, AE, Peripheral Lymphadenopathy in Dogs: Differential Diagnoses | Clinician’s Brief (  Peripheral Lymphadenopathy in Dogs: Differential Diagnoses.  Clinician’s Brief Jan/Feb 2023 p 54.  Peripheral Lymphadenopathy in Dogs: Differential Diagnoses | Clinician’s Brief (

Bennett JA, Hohenhaus A, Andersen TT. Proof-of-Concept Study of an Alpha-Fetoprotein-Derived Peptide for the Management of Canine Mammary Cancer. Animals (Basel). 2023 Jan 25;13(3):403. doi: 10.3390/ani13030403. PMID: 36766292; PMCID: PMC9913752.

Lawson HC, Musser ML, Regan R, Moore AS, Hohenhaus A, Flesner B, Johannes CM. Toxicity, outcome, and management of anthracycline overdoses in 16 dogs. J Vet Intern Med. 2022 Jan;36(1):234-243. doi: 10.1111/jvim.16325. Epub 2021 Nov 25. PMID: 34825413; PMCID: PMC8783333.

Verrilli A, Hohenhaus AE, Leibman NF, Mosher B.  Safety and efficacy of a ribose-cysteine supplement to increase erythrocyte glutathione concentrations in healthy dogs.  Am J Vet Res. 2021;82:653-658.

Williams AG, Hohenhaus AE, Lamb KE. Incidence and treatment of feline renal lymphoma: 27 cases. J Fel Med Surg.2021;23(10):936-944.

Kharbush RJ, Hohenhaus AE, Donovan TA, Fox PR. B-cell lymphoma invading and compressing the heart base and pericardium in a cat. J Vet Cardiol 2021;35;84:89

Air gun ballistic projectile lodged in the interventricular septum of an asymptomatic dog. Fox PR, Hohenhaus AE, Kharbush R. CASE; 2020 (Sept 14)

Giant pericardial-occupying compressive primary cardiac hemangiosarcoma in a cat. Herrold EJ, Donovan TA, Hohenhaus AE, Fox PR. J Vet Cardiol. 2020 Jun;29:54-59. doi: 10.1016/j.jvc.2020.04.004. Epub 2020 May 5.PMID: 32497967

Winzelberg Olson S, Hohenhaus AEFeline non-regenerative anemia: Diagnostic and treatment recommendations.  J Feline Med Surg. 2019 Jul;21(7):615-631.

Diessner BJ, Marko TA, Scott RM, Eckert AL, Stuebner KM, Hohenhaus AE, Selting KA, Largaespada DA, Modiano JF, Spector LG.   A comparison of risk factors for metastasis at diagnosis in humans and dogs with osteosarcoma.  Cancer Med. 2019 Jun;8(6):3216-3226.

Wright KZ, Hohenhaus AE, Verrilli AM, Vaughan-Wasser S.Feline large-cell lymphoma following previous treatment for small-cell gastrointestinal lymphoma: incidence, clinical signs, clinicopathologic data, treatment of a secondary malignancy, response and survival. J Feline Med Surg. 2018 Jun 1:1098612X18779870. doi: 10.1177/1098612X18779870.