[Papillary thyroid cancer lying within a toxic adenoma (author's transl)].

The association of hyperthyroidism and thyroid cancer is rare. The commonest finding is multilobular goitres. When a toxic adenoma is associated with a thyroid cancer they are usually clearly separate lesions. A thyroid cancer lying within a toxic adenoma, as in this case, is a much rarer occurrence, and a review of the published literature suggests that the relatively frequent association of the two lesions is fortuitous. The possibility of a cancer occurring near, or within a toxic adenoma, is an argument in of surgical treatment of these formations.