Thyroid papillary cancer using TPO staining

: Immunostaining for TPO (MoAb47) has been used to predict the risk of thyroid cancer in thyroid adenomas without uptake in thyroid 99m pertechnetate scintigraphy. This case describes a 16-year-old girl with thyroid papillary cancer staining 95% positive using TPO staining. The case indicates that TPO staining can not be used as the only parameter in the evaluation of the risk of cancer in the thyroid gland.