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Results of thyroidectomy in 101 cats with hyperthyroidism
Elaine C Naan1, Jolle Kirpensteijn, Hans S Kooistra
1Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands. E.C.Naan@vet.uu.nl
Veterinary Surgery : VS
|April 26, 2006
Summary
Thyroidectomy is an effective treatment for hyperthyroid cats, with uncommon complications when performed by experienced surgeons. Ectopic hyperplastic thyroid tissue (EHTT) significantly increases recurrence risk, making preoperative scintigraphy advisable.
Area of Science:
- Veterinary Surgery
- Endocrinology
Background:
- Hyperthyroidism is a common endocrine disorder in cats.
- Thyroidectomy is a treatment option when radioactive iodine therapy is unavailable.
Purpose of the Study:
- To describe outcomes after thyroidectomy in hyperthyroid cats.
- To emphasize peri- and postsurgical complications and recurrence rates.
Main Methods:
- Retrospective study of 101 hyperthyroid cats.
- Preoperative diagnostics included plasma biochemistry and thyroid scintigraphy.
- Modified intracapsular dissection technique with postoperative monitoring of plasma calcium.
Main Results:
- Ectopic hyperplastic thyroid tissue (EHTT) was identified in 9 cats.
- Two surgical mortalities and transient hypocalcemia in 5 cats occurred.
- Hyperthyroidism recurred in 5 cats, significantly more often in those with EHTT (P<.001).
Conclusions:
- Thyroidectomy has a low incidence of complications and is effective for hyperthyroid cats.
- Preoperative thyroid scintigraphy is recommended to identify EHTT.
- Surgery is not recommended for cats with EHTT due to higher recurrence rates.