[Treatment of Plummer's adenoma: correlation between ultrasonography-guided percutaneous injection of ethanol and autoimmunity].

The authors investigated the value of percutaneous ethanol injection in the treatment of Plummer's adenoma. Ten patients were studied: they exhibited a single, hot and toxic nodule in the thyroid. Thyroid autoimmunization (TSAb; TMAb; TGAb) and function (T3; T4; TSH; FT3; FT4) were studied in all patients, before treatment and at 1 month and 3 months. Scintigraphy with 99Tc was performed at the same time intervals. In the euthyroid stage, alcoholization was preceded by US and cytology. Three-four ml of ethanol 95 degrees were injected once or twice a week, from a minimum of 3 to a maximum of 8 injections. Treatment was successful in 2 cases; partial success was obtained in 4 cases, and in 4 cases treatment failed. In all successful cases antibodies were negative and the nodules had hypoechoic echostructure, with a peripheral hypoechoic halo and no areas of internal colliquation. Thus, US-guided percutaneous alcoholization seems to be capable of correct indications in hypoechoic nodules not exhibiting areas of colliquative necrosis and with negative antibodies. However, the problem of the dose of alcohol to inject to treat the nodule thoroughly is still to be debated.