She was thyroidectomized at the age of 26 for a multihetero nodular thyroid with elevated calcitonin; examination of this thyroidectomy did not find C-cell hyperplasia or medullary carcinoma, but several adenomas were found on both lobes, and there was a small oncocytic adenoma in the left lobe. The gene discussed is CALCA; the disease is C-cell hyperplasia.