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== Do's ==
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'''Thyroglobulin level monitoring'''
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*Order serum Tg periodically during follow-up of patients with differentiated thyroid cancer who have undergone less than total thyroidectomy
|[[image:LowKECG.png|thumb|700px|center|An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval. By James Heilman, MD - Own work, CC BY-SA 3.0]]
*Order serum Tg periodically during follow-up of patients with differentiated thyroid cancer who have had a total thyroidectomy but not radioactive iodine ablation
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'''Cervical ultrasound'''
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*Perform cervical ultrasound to evaluate thyroid 6–12 months following surgery
'''18FDG-PET scanning'''
*Consider 18FDG-PET scanning in high-risk differentiated thyroid cancer patients with elevated serum Tg (generally >10 ng/mL) and negative radioactive iodine imaging
'''CT scans'''
*Order chest CT scan with or without IV contrast in high-risk differentiated thyroid cancer patients with elevated serum Tg (generally >10 ng/mL) or rising Tg antibodies with or without negative radioactive iodine imaging
'''TSH range'''
*Maintain serum TSH below 0.1 mU/L in patients with a structural incomplete response to therapy, indefinitely in the absence of specific contraindications
*Maintain serum TSH between 0.5-2 mU/L in patients with an excellent or indeterminate response to therapy, especially those at low risk for recurrence
'''Surgery for nodal disease'''
*Perform surgery in patients with clinically apparent, macroscopic nodal disease
*Perform therapeutic compartmental central and/or lateral neck dissection in a previously operated compartment, in patients with biopsy-proven persistent or recurrent disease for central neck nodes ≥8 mm and lateral neck nodes ≥10 mm
*Perform compartmental surgery
*Perform combination of surgery and RAI and/or EBRT in patients with aerodigestive invasive disease
*Perform combination of surgery and 131I and/or external beam radiation therapy in patients who have tumors that invade the upper aerodigestive tract
*Order complete blood count and assessment of renal function before administration of radioactive iodine
*Discuss preventive strategies for dental caries with patients with xerostomia
'''Radioactive iodine therapy'''
[[image:LowKECG.png|thumb|700px|right|An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval. By James Heilman, MD - Own work, CC BY-SA 3.0]]
*Order pregnancy test before radioactive iodine administration
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*Administer radioactive iodine therapy in patients with iodine-avid bone metastases
*Administer radioactive iodine therapy in patients with pulmonary micrometastases
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*Repeat radioactive iodine therapy in patients with pulmonary micrometastases every 6-12 months
An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval. By James Heilman, MD - Own work, CC BY-SA 3.0
An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval. By James Heilman, MD - Own work, CC BY-SA 3.0
