Abnormal signals involving the basal ganglia on MR images have been reported with new-onset hemichorea-hemiballism, typically in elderly Asian patients. The most common cause is a vascular lesion, but many cases are reported in association with hyperglycemia. We describe one case of acute onset chorea-hemiballism with abnormal MRI signal in the basal ganglia but with no systemic abnormality.
OhSHLeeKYImJH: Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a Meta-analysis of 53 cases including four present cases. J Neurol Sci200: 5–62, 2002.
2.
ChangMHChiangHTLaiPH: Putaminal petechial haemorrhage as the cause of chorea: a Neuroimaging study. J Neurol Neurosurg Psychiatry63: 300–303, 1997.
3.
LaiPHTienRDChangMH: Chorea-ballismus with nonketotic hyperglycemia in primary diabetes mellitus. Am J Neuroradiol17: 1057–1064, 1996.
4.
ChuKKangDWKimDE: Diffusion-weighted and gradient echo magnetic resonance findings of hemichorea-hemiballismus associated with diabetic hyperglycemia: a Hyperviscosity syndrome?Arch Neurol59: 448–452, 2002.
FujiokaMTaokaTMatsuoY: Magnetic resonance imaging shows delayed ischemic striatal neurodegeneration. Ann Neurol54: 732–747, 2003.
7.
WintermarkMFischbeinNJMukherjeeP: Unilateral putaminal CT, MR, and diffusion abnormalities secondary to nonketotic hyperglycemia in the setting of acute neurologic symptoms mimicking stroke. Am J Neuroradiol25: 975–976, 2004.
8.
da SilvaCJda RochaAJJeronymoS: A Preliminary Study Revealing a New Association in Patients Undergoing Maintenance Hemodialysis: Manganism Symptoms and T1 Hyperintense Changes in the Basal Ganglia. Am J Neuroradiol28: 1474–1479, 2007.
9.
ShanDEHoDMChangC: Hemichorea-hemiballism: An explanation for MR signal changes. Am J Neuroradiol19: 863–870, 1998.
