Peer-reviewed veterinary case report
Hemithyroidectomy due to a large, solid follicular thyroid adenoma in a 19-year-old thoroughbred mare.
- Journal:
- Journal of equine veterinary science
- Year:
- 2026
- Authors:
- Bramall, L M et al.
- Affiliation:
- Oakhill Veterinary Centre · United Kingdom
- Species:
- horse
Plain-English summary
A 19-year-old thoroughbred mare had a large growth on her thyroid gland, measuring 26 centimeters across, which needed to be surgically removed. She underwent a procedure called hemithyroidectomy, where part of the thyroid gland was taken out. The surgery went well, and there were no long-term problems afterward. Four and a half years later, she is still doing well and thriving.
Abstract
This case report describes the successful hemithyroidectomy of the largest equine solid follicular adenoma described in the veterinary literature to date. A 19-year-old thoroughbred mare was referred to Oakhill Veterinary Centre for the surgical removal of a large, left-sided thyroid gland measuring 26cm in diameter. Pre-operative considerations, the hemithyroidectomy surgical technique as well as the intra- and post-operative complications encountered, are discussed. Following surgery the horse had no long-term complications and continues to thrive four and a half years post-operatively.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/41707982/