Development of involuntary movements after ventriculoperitoneal shunting for normal pressure hydrocephalus in a patient with chronic-phase thalamic haemorrhage.
BACKGROUND
Delayed-onset involuntary movements have been described after thalamic stroke.


METHODS
We treated a patient with involuntary movements that increased after ventriculoperitoneal shunting (VPS) for normal pressure hydrocephalus (NPH) following thalamic haemorrage. One and one-half years after right thalamic and intraventricular haemorrhage, NPH suggested clinical evaluation and neuroimaging studies in a 56-year-old man.


RESULTS
Hemidystonia and pseudochoreoathetosis were evident in the left arm, leg and trunk. Proprioceptive impairment and mild cerebellar dysfunction affected the left upper and lower extremity. Yet the patient could walk unassisted and carry out activities of daily living (ADL) rated as 90 points according to the Barthel Index (BI). Lumbar puncture lessened both gait disturbance and cognitive impairment. After VPS, cognition and urinary continence improved, but involuntary movements worsened, precluding unaided ambulation and decreasing the BI score to 65 points. Computed tomography after VPS showed resolution of NPH, while single-photon emission computed tomography showed increased cerebral blood flow after VPS.


CONCLUSIONS
Increased cerebral blood flow after VPS is suspected to have promoted development of abnormal neuronal circuitry.
Shindo
Keiichiro
K
Department of Physical Medicine and Rehabilitation, Tohoku University Graduate School of Medicine, Sendai, Japan. krugreims@yahoo.co.jp
Kondo
Takeo
T
Sugiyama
Ken
K
Nishijima
Kazunori
K
Furusawa
Yoshihito
Y
Mori
Takayuki
T
Izumi
Shin-Ichi
S
D001921:Brain / Q000000981:diagnostic imaging; D002543:Cerebral Hemorrhage / Q000150:complications* / Q000175:diagnosis; D002560:Cerebrovascular Circulation; D006801:Humans; D006850:Hydrocephalus, Normal Pressure / Q000209:etiology / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009069:Movement Disorders / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D013786:Thalamic Diseases / Q000150:complications* / Q000175:diagnosis; D015899:Tomography, Emission-Computed, Single-Photon; D017287:Ventriculoperitoneal Shunt / Q000009:adverse effects*