Applied Evidence

Head & neck cancers: What you’ll see, how to proceed

J Fam Pract. 2019 November;68(9):E1-E7

References

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Thyroid US is the study of choice for initial evaluation of the size and features of a nodule; findings are used to make recommendations for further workup. If further evaluation is indicated, FNA biopsy is the test of choice.²⁹

In 2016, the American Thyroid Association released updated guidelines for evaluating thyroid nodules (TABLE).³⁰ The US Preventive Services Task Force recommends against screening for thyroid cancer by neck palpation or US in asymptomatic patients because evidence of significant mortality benefit is lacking.³¹

How is it treated? Treatment of thyroid cancer focuses on local excision of the nodule by partial or total thyroidectomy (depending on the size and type of cancer) and surgical removal of involved lymph nodes. Differentiated thyroid cancer is categorized as high-, medium-, or low-risk, depending on tumor extension, incomplete tumor resection, size of lymph nodes > 3 cm, and distant metastases. Adjuvant treatment with radioactive iodine can be considered for intermediate-risk DTC and is recommended for high-risk DTC.³²

Following surgical treatment, thyroid-stimulating hormone suppression is recommended using levothyroxine.³³ Patients at higher risk of recurrence should have longer and more intense suppression of thyroid-stimulating hormone.³⁰ Levels of serum thyroglobulin and anti-thyroglobulin antibody should be followed postoperatively; rising values can indicate recurrent disease. The calcitonin level should be followed in patients with a history of MTC. Thyroid US should be performed 6 to 12 months postoperatively, then periodically, depending on determination of recurrence risk and any change in the thyroglobulin level.³⁰

Human papillomavirus is associated with an increasing number of cases of head and neck cancer.

(Note: Glucagon-like peptide-1 [GLP-1] receptor agonists, used to treat type 2 diabetes mellitus, carry a black-box warning for their risk of MTC and are contraindicated in patients who have a personal or family history of MTC, MEN2A, or MEN2B.³⁴)

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