Felis ISSN 2398-2950

Thyroidectomy

Contributor(s): Andrew Gardiner, Zoe Halfacree, Joseph Harari

Introduction

Uses

  • Excision of functional thyroid adenomatous hyperplasia and treatment of associated hyperthyroidism Hyperthyroidism.
  • Excision of functional thyroid carcinomas Thyroid gland: neoplasia (rare).
  • Excision of functional parathyroid adenoma of the caudal internal parathyroid (rare).

Advantages

  • Definitive removal of abnormal tissue and allowing histopathology.
  • Preferable in cats that are difficult to medicate or do not tolerate side effects of medication.
  • Relatively cheap treatment options which is widely available without the need for specialist facilities.

Disadvantages

  • Ectopic thyroid tissue (thoracic inlet, mediastinum) can result in recurrence of hyperthyroidism (5% of cases).
  • Recurrence of hyperthyroidism due to residual nests of cells left behind with cranial capsules or tissue is a risk especially with intracapsular techniques.
  • Requires general anesthesia General anesthesia: overview and in some cats, especially with comorbidities, this may be poorly tolerated.

Requirements

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Preparation

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Procedure

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Aftercare

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Williams T L, Elliot J, Syme H M (2010) Association of iatrogenic hypothyroidism with azotaemia and reduced survival time in cats treated for hyperthyroidism. JVIM 24 (5), 1086-1092 PubMed.
  • Padgett S (2002) Feline thyroid surgery. Vet Clin North Am Small Anim Pract 32 (4), 851-859 PubMed.
  • Padgett S L, Tobias K M, Leathers C W et al (1998) Efficacy of parathyroid gland autotransplantation in maintaining serum calcium concentrations after bilateral thyroparathyroidectomy in cats. JAAHA 34 (3), 219-224 PubMed.
  • Welches C D, Scavelli T D, Matthiesen D T et al (1989) Occurrence of problems after three techniques of bilateral thyroidectomy in cats. Vet Surg 18 (5), 392-396 PubMed.
  • Flanders J A, Harvey H A, Erb H N (1988) Feline thyroidectomy: a comparison of post-operative hypocalcaemia associated with three different surgical techniques. Vet Surg 17 (2), 59 VetMedResource.
  • Flanders J A, Harvey H A, Erb H N (1987) Feline thyroidectomy. A comparison of post-operative hypocalcaemia associated with three different surgical techniques. Vet Surg 16 (5), 362-366 PubMed.

Other sources of information

  • Slatter D (Ed) (1993) Textbook of Small Animal Surgery. 2nd edn (Vol 1 and 2) Philadelphia: W B Saunders. ISBN 0 7216 8330 4. (In-depth text, good illustrations, recommended).
  • Fossum T L (Ed) (1997) Small Animal Surgery. St Louis: Mosby. ISBN 0 8151 3238 7.


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