ISSN 2398-2942      

Thyroidectomy

icanis
Contributor(s):

Zoe Halfacree


Introduction

Uses

  • Excision of thyroid masses.

    Ectopic thyroid tissue can be present anywhere from the tongue to the heart base, but mass is typically in mid cervical region.

Advantages

  • Definitive removal of abnormal tissue and allowing histopathology and potential cure.

Disadvantages

  • Highly vascular and invasive nature of some tumors (fixed) may make surgical resection non-feasible or high risk.

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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Prognosis

  • Good to excellent for tumors with appropriate treatment.
    Better for mobile vs fixed, smaller than volume of 20 cm3 or diameter of 5 cm, unilateral versus bilateral.
  • Median survival times:
    • Untreated thyroid carcinoma: 3 months.
    • Mobile thyroid carcinomas with surgery alone: greater than 36 months.
    • Fixed thyroid carcinomas with surgery alone: 10 months.
    • Fixed thyroid carcinomas with radiation therapy: 24.5 to greater than 45 months.

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Liptak J M, Kamstock D A, Dernell W S et al (2008) Cranial mediastinal carcinomas in nine dogs. Vet Comp Oncol 6 (1), 19-30 PubMed.
  • Liptak J M (2007) Canine thyroid carcinoma. Clin Tech Small Anim Pract 22 (2), 75-81 PubMed.
  • Turrel J M, McEntee M C, Burke B P et al (2006) Sodium iodide I 131 treatment of dogs with nonresectable thyroid tumors: 39 cases (1990-2003). J Am Vet Med Assoc 229 (4), 542-548 PubMed.
  • Pack L, Roberts R E, Dawson S D et al (2001) Definitive radiation therapy for infiltrative thyroid carcinoma in dogs. Vet Radiol Ultrasound 42 (5), 471-474 PubMed.
  • Théon A P, Marks S L, Feldman E S et al (2000) Prognostic factors and patterns of treatment failure in dogs with unresectable differentiated thyroid carcinomas treated with megavoltage irradiation. J Am Vet Med Assoc 216 (11), 1775-1779 PubMed.
  • Brearley M J, Hayes A M, Murphy S (1999) Hypofractionated radiation therapy for invasive thyroid carcinoma in dogs: A retrospective analysis of survival. J Small Anim Pract 40 (5), 206-210 PubMed.
  • Peterson M E, Kintzer P P, Hurley J R et al (1989) Radioactive iodine treatment of a functional thyroid carcinoma producing hyperthyroidism in a dog. J Vet Intern Med 3 (1), 20-25 PubMed.

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