[Bilateral lymphoepithelial cysts of the thyroid].

Lymphoepithelial cysts are rare lesions of the thyroid, with exceptional bilateral presentation. We report the case of a 62-year-old woman presenting with a multinodular goiter, without associated clinical or biological abnormality. Histological examination demonstrated multiple cysts lined by squamous or respiratory-type epithelium, associated with a dense lymphoid infiltrate. Chronic thyroiditis and numerous solid cell nests were also observed in the adjacent parenchyma. We briefly discuss differential diagnosis and current hypothesis concerning the pathogenesis of these peculiar lesions.