Normal neurological outcome after congenital thyrotoxicosis: prognostic value of observation of general movements.

We followed up a patient born preterm with congenital thyrotoxicosis by observing her general movements (GMs) in accordance with Prechtl's method. Initially a chaotic pattern was observed. Along with the normalization of thyroid hormones, the GM pattern changed to a poor repertoire at four weeks of life, full-blown writhing movements at six weeks and fidgety movements at the age of four months. This is the first report of chaotic GMs in a neonate reflecting transient neurological dysfunction related to congenital thyrotoxicosis, with subsequent normal neurological and cognitive outcome.