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McEntire MS, Tang KN, O'Connor MR, Haulena M. THE MANAGEMENT OF LYMPHOPROLIFERATIVE NEOPLASIA IN FOUR NORTHERN SEA OTTERS ( ENHYDRA LUTRIS KENYONI). J Zoo Wildl Med 2024; 55:511-520. [PMID: 38875209 DOI: 10.1638/2022-0096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2024] [Indexed: 06/16/2024] Open
Abstract
Lymphoproliferative neoplasia has been reported in both free-ranging sea otters and those in managed care, but little information is available on the management of this neoplastic disease in this species. This case series describes clinical lymphoma in four northern sea otters (Enhydra lutris kenyoni) in managed care. Two otters presented with Stage 5 lymphoma with evidence of hematologic spread resulting in leukemia. Two additional otters presented with Stage 3 disease. Immunophenotypes in these cases included disseminated large B-cell lymphoma and lymphoblastic lymphoma of potential T-cell origin. Cases were managed with multiagent chemotherapy protocols including prednisone, L-asparaginase, cyclophosphamide, vincristine, cytosine arabinoside, lomustine, and doxorubicin. Unique approaches included the use of a vascular access port in one case and development of an autologous vaccine in another. Survival time ranged from 81 to 409 days. Diagnosis, staging, and treatment with multiagent protocols is recommended for the management of lymphoma in sea otters.
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Affiliation(s)
- Michael S McEntire
- John G. Shedd Aquarium, Chicago IL 60605, USA and Vancouver Aquarium, Vancouver BC V6G 3E2, Canada
| | - Karisa N Tang
- John G. Shedd Aquarium, Chicago IL 60605, USA and Vancouver Aquarium, Vancouver BC V6G 3E2, Canada
| | - Matthew R O'Connor
- John G. Shedd Aquarium, Chicago IL 60605, USA and Vancouver Aquarium, Vancouver BC V6G 3E2, Canada
| | - Martin Haulena
- John G. Shedd Aquarium, Chicago IL 60605, USA and Vancouver Aquarium, Vancouver BC V6G 3E2, Canada,
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Watson MK, Cazzini P, Mayer J, Gottdenker N, Reavill D, Parry N, Fox JG, Sakamoto K. Histology and immunohistochemistry of severe inflammatory bowel disease versus lymphoma in the ferret (Mustela putorius furo). J Vet Diagn Invest 2016; 28:198-206. [DOI: 10.1177/1040638716641156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a common disorder of ferrets ( Mustela putorius furo) that may progress to lymphoma. Although routine histology is used to distinguish between these diseases, misclassifications may occur. Immunohistochemistry (IHC) is commonly used to distinguish between IBD and lymphoma in small animals. The objective of our study was to determine the agreement in the diagnosis reached solely using hematoxylin and eosin (HE)-stained, full-thickness sections versus using a combination of HE and IHC. Enteric sections from 44 ferrets previously diagnosed with IBD or intestinal lymphoma and 3 control ferrets were analyzed by pathologists with expertise in ferrets. A pathologist blinded to the original diagnosis assessed the same HE-stained sections. Analysis was then repeated using HE sections in parallel with sections stained using antibodies against CD3 and CD79a. No significant difference was found between the original HE diagnosis and the HE diagnosis reached by the blinded pathologist ( p = 0.91) or between the blinded pathologist’s HE versus HE with IHC diagnosis ( p = 0.16). In the 2 cases where disagreement was present, IHC was pivotal in reaching a final diagnosis. There was no significant age ( p = 0.29) difference between diagnoses; however, significantly more male ferrets were affected with IBD than females ( p = 0.004). Immunophenotype of the lymphoma was not correlated with predilection for location in the intestinal wall ( p = 0.44). Results suggest that although IHC is not necessary to distinguish IBD from intestinal lymphoma in ferrets, it can be useful a definitive diagnosis in cases of severe IBD.
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Affiliation(s)
- Megan K. Watson
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Paola Cazzini
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Joerg Mayer
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Nicole Gottdenker
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Drury Reavill
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Nicola Parry
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - James G. Fox
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
| | - Kaori Sakamoto
- College of Veterinary Medicine, University of Illinois, Urbana, IL (Watson)
- Royal (Dick) School of Veterinary Studies, Easter Bush Pathology, University of Edinburgh, Edinburgh, United Kingdom (Cazzini)
- College of Veterinary Medicine, University of Georgia, Athens, GA (Sakamoto, Gottdenker, Mayer)
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA (Fox, Parry)
- Zoo/Exotic Pathology Service, West Sacramento, CA (Reavill)
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Abstract
Ferrets (Mustela putorius furo) belong to the ancient family Mustelidae, which is believed to date back to the Eocene period, some 40 million years ago. The taxonomic groups in the family Mustelidae, as recognized by Nowak (1999), include 67 species in 25 genera from North, Central, and South America; Eurasia; and Africa. No other carnivore shows such diversity of adaptation, being found in a wide variety of ecosystems ranging from arctic tundra to tropical rainforests. Mustelids have retained many primitive characteristics, which include relatively small size, short stocky legs, five toes per foot, elongated braincase, and short rostrum (Anderson, 1989). The Mustelinae is the central subfamily of the Mustelidae. The best-known members of the Mustelinae are the weasels, mink, ferrets (genus Mustela), and the martens (genus Martes) (Anderson, 1989). The genus Mustela is divided into five subgenera: Mustela (weasels), Lutreola (European mink), Vison (American mink), Putorius (ferrets), and Grammogale (South American weasels). The smallest member of the Mustelidae family is the least weasel (Mustela nivalis), which weighs as little as 25 g, and the largest member is the sea otter (Enhydra lutris), which can weigh as much as 45 kg (Nowak, 1999).
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Affiliation(s)
- Joerg Mayer
- College of Veterinary Medicine, University of Georgia Athens, Georgia
| | - Robert P. Marini
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, MA, USA
| | - James G. Fox
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, MA, USA
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Abstract
Exotic small mammal medicine is a relatively new specialty area within veterinary medicine. Ferrets, rabbits, and rodents have long been used as animal models in human medical research investigations, resulting in a body of basic anatomic and physiologic information that can be used by veterinarians treating these species. Unfortunately, there is a paucity of veterinary articles that describe clinical presentation, diagnosis, and treatment options of gastrointestinal (GI) disease as it affects exotic small mammals. Although there is little reference material relating to exotic small mammal GI disease, patients are commonly presented to veterinary hospitals with digestive tract disorders. This article provides the latest information available for GI disease in ferrets (Helicobacter mustelae gastritis, inflammatory bowel disease [IBD], GI lymphoma, systemic coronavirus, coccidiosis, and liver disease), rabbits (GI motility disorders, liver lobe torsion, astrovirus, and coccidiosis), guinea pigs (gastric dilatation volvulus [GDV]), rats (Taenia taeniaeformis), and hamsters (Clostridium difficile). Both noninfectious diseases and emerging infectious diseases are reviewed as well as the most up-to-date diagnostics and treatment options.
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Affiliation(s)
- Minh Huynh
- Exotic Medicine Service, Centre Hospitalier Vétérinaire Fregis, Arcueil, France
| | - Charly Pignon
- Exotic Medicine Service, Centre Hospitalier Vétérinaire d’Alfort, Ecole Nationale Vétérinaire d’Alfort, Maisons-Alfort, France
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