[Bulbar paralysis and flaccid tetraparesis in thyrotoxicosis].

We describe the case of an aged patient, presenting an acute onset of flaccid paralysis of the limbs and bulbar weakness, complicated by ab ingestis pneumonia. These neurological findings were the first signs of a thyrotoxic crisis and showed a progressive regression together with the healing of the hyperthyroidism obtained, within two months, utilizing thyroid inhibitors. At the onset, a marked hypokalaemia was present, making possible the hypothesis of a thyrotoxic periodic paralysis. The hypokalaemia was corrected after many infusions of KCl i.v., without obtaining significant modifications of the neurological picture. Taking into consideration the evolution and the results of the instrumental procedures (EMG, MRI) we believe this a rare case of thyrotoxic acute myopathy, with bulbar involvement, casually associated to hypokalaemia.