Thyroid nodules are relatively common in adolescents; these nodules are usually asymptomatic and often discovered incidentally, but they raise the fear of cancer. A multi-nodular goiter is almost invariably caused by Hashimoto's thyroiditis and it carries a good prognosis. The asymptomatic, solitary thyroid nodule is a thyroid adenoma, thyroid carcinoma or a thyroid cyst. Thyroid carcinoma occurs in approximately one per one million persons/year in the first-two decades of life.