Diabetes Mellitus is a chronic metabolic disease that constitutes one of the most serious public health problems worldwide. With the advent of new drugs and advances in the understanding of its etiopathogenesis, the quality of life of patients suffering diabetes mellitus has been improved. However, the large number of complications to which patients are exposed remains a challenge for health professionals, being the most frequent from cardiovascular nature, renal, retinal, peripheral nervous system and even increasing the risk of mortality. 

Not much has been documented about the consequent relationship of movement disorders as a result of metabolic alterations, although cases of glucotoxicity and hyperkinetic disorders such as chorea and ballism have been described.

In the present article we describe the case of an 80-year-old woman with diabetes mellitus in poor metabolic control, associated with hemichorea and ballism.