[Thyroïd cyst, parathyroïd adenoma and lithium therapy (author's transl)].

A forty years old woman had euthyroidïd functions three years ago, with normal scintiscanning. Under treatment with Lithium, she developed a clinical and biological hypothyroidïdism. A "cold" nodule was fund on the scintiscanning. Hypercalcemia and hypophosphoremia were fortuitously discovered prior to operation. A single parathyroididïd adenoma was excised from the left inferior gland. Incidence of Lithium in the appraisal of the thyroïd cyst and the parathyroïd adenoma is discussed.