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Updates on Thyroid Disease in Rabbits and Guinea Pigs
Peter M DiGeronimo1, João Brandão2
1Adventure Aquarium, 1 Riverside Drive, Camden, NJ 08103, USA; Animal & Bird Health Care Center, 1785 Springdale Road, Cherry Hill, NJ 08003, USA.
Summary
Hyperthyroidism, a rare thyroid disease in guinea pigs and rabbits, presents with weight loss and neck masses. Diagnosis relies on elevated thyroxine levels, with treatment options including medication, radioactive iodine, or surgery.
Area of Science:
- Veterinary Medicine
- Endocrinology
- Small Mammal Medicine
Background:
- Naturally occurring thyroid disease, specifically hyperthyroidism, is increasingly recognized in exotic small mammals.
- Hyperthyroidism in guinea pigs (Cavia porcellus) and rabbits (Oryctolagus cuniculus) is likely underdiagnosed due to nonspecific clinical signs.
- Challenges in diagnosis include the lack of validated assays and species-specific reference intervals for thyroid function.
Purpose of the Study:
- To review the current understanding of hyperthyroidism in guinea pigs and rabbits.
- To highlight diagnostic challenges and methods for naturally occurring thyroid disease in these species.
- To outline treatment modalities for hyperthyroidism in exotic small mammals.
Main Methods:
- Literature review of English-language publications on thyroid disease in guinea pigs and rabbits.
- Analysis of consistently observed clinical signs associated with hyperthyroidism.
- Evaluation of diagnostic support from blood thyroxine concentrations.
Main Results:
- Weight loss, with or without appetite changes, and a palpable cervical mass are key clinical signs.
- Elevated blood thyroxine concentrations support the diagnosis of hyperthyroidism.
- Increasing publications suggest a rise in diagnosed thyroid disease in exotic mammals.
Conclusions:
- Hyperthyroidism is a significant, albeit rare, condition in guinea pigs and rabbits.
- Accurate diagnosis requires careful consideration of clinical signs and validated assays.
- Multiple treatment options, including medical, radioactive iodine therapy, and surgical thyroidectomy, are available.
