[Guideline 'Differentiated thyroid carcinoma', including diagnosis of thyroid nodules].

Differentiated thyroid carcinoma is a rare disease. Appropriate diagnosis, treatment and follow-up are complex but greatly influence treatment outcomes and patient quality of life. Patients with differentiated thyroid carcinoma present in many hospitals throughout the Netherlands, underscoring the need for uniformity in diagnosis and treatment. This prompted the Dutch Society of Nuclear Medicine and the Dutch Endocrine Society to develop an evidence-based guideline that emphasises not only new scientific developments but also the organisation of care. Thyroid-stimulating hormone (TSH) assessment and fine needle aspiration cytology play a central role in the diagnostic assessment of a patient with a thyroid nodule. Ablation of residual thyroid tissue with radioiodine (1-131) is recommended for all patients who have undergone total thyroidectomy. Follow-up protocols distinguish between patients with a low risk of thyroid-carcinoma recurrence and those with a non-low risk of recurrence.