Twenty patients with well-differentiated thyroid carcinoma, 20 yr of age or younger have been treated at Vanderbilt University Hospital. The young patient with thyroid carcinoma frequently presents with far-advanced disease but enjoys an improved survival. Preoperative scintiscanning is useful in the evaluation of patients with childhood thyroid carcinoma. A new noninvasive scan is described and appears to be promising in the preoperative differentiation between benign and malignant thyroid lesions in children and young adults. There is a high instance of nodal metastases, but long-term followup would indicate that lobectomy and modified neck dissection are sufficient for most patients. However, total thyroidectomy can be performed safely in those patients with disease in both lobes. Additionally, frozen section diagnoses were found to be helpful in diagnosing and staging thyroid carcinoma. © 1979 Grune & Stratton, Inc.