from Section II - Movement disorders in systemic disease
Published online by Cambridge University Press: 05 April 2014
Introduction
Several endocrine disorders can affect any part of the central and peripheral nervous systems. Neurological complications of endocrine disorders such as neuropathy and coma in diabetes mellitus, for instance, are well recognized; however, the occurrence of secondary movement disorders (MDs) has only recently been properly appreciated in the medical literature. MDs can develop in different settings, ranging from chronic and relatively well controlled to acute, decompensated endocrine diseases.
In this chapter, we concisely describe the phenomenology and other clinical aspects of MDs most consistently found in association with several endocrinopathies. Here, we include clinical scenarios that involve the occurrence of MDs as complications of endocrinopathies, syndromes that encompass MDs and endocrinopathies, and specific situations in which independent MDs and endocrinopathies co-occur and interfere negatively with each other (see Table 10.1).
Diabetes mellitus
Hemichorea-hemiballism in non-ketotic hyperglycemia
MD can occur in both hypo- and hyperglycemia. The most widely recognized clinical scenario is that of hemichorea-hemiballism (HCHB) during non-ketotic hyperglycemia (NKH), in situations that range from pure hyperglycemia to non-ketotic hyperosmolar state (Lin and Chang 1994). The typical presentation is that of an acute, lateralized hyperkinetic syndrome in older adults with type 2 diabetes mellitus. Occasionally, more insidious onset and more generalized movements have been described. Additional features include hypotonia, weakness, pyramidal tract signs, asterixis, seizures, and altered level of consciousness. Although MDs in these cases are self-limited, the rate and degree of improvement range from days with no need for symptomatic interventions, except for correction of blood glucose level, to a persistent state lasting for months, requiring specific treatment (Oh et al. 2002; Zétola et al. 2010).
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