Related Experiment Videos
Postinfectious cerebellitis: clinical significance of Tc-99m HMPAO brain SPECT compared with MRI
E C San Pedro1, J M Mountz, H G Liu
1Division of Nuclear Medicine, Department of Radiology, University of Alabama, Birmingham Medical Center, Alabama 35233, USA.
Purpose:
We compared Tc-99m HMPAO brain SPECT and MRI with the clinical findings in a case of a 14-year-old boy with post-infectious cerebellitis.
Results:
Tc-99m HMPAO brain SPECT scan showed marked reduction in perfusion to the left anterior lobe, left lateral hemisphere, and left posterior lobe of the cerebellum. The MRI showed a limited region of abnormal signal in the mid posterior left cerebellar hemisphere. Since the patient's overall neurological deficit was characterized by ataxia, nystagmus, head and body titubation, dysmetria, dysdiadochokinesia, loss of normal check, and rebound testing attributed to the involvement of the anterior, lateral, and posterior lobes of the left cerebellar hemisphere, the Tc-99m HMPAO brain SPECT finding correlated better with the extent of functional neurological deficits.
Conclusion:
Tc-99m HMPAO brain SPECT may better assess cerebellar signs and symptoms in cerebellitis since the blood flow abnormalities correlated with dysfunction of the cerebellum, whereas the MRI abnormalities did not encompass the scope of the neurological deficits.
Insights
Technetium Tc-99m HMPAO brain SPECT better assessed functional neurological deficits in pediatric cerebellitis compared to MRI. SPECT findings correlated with cerebellar dysfunction, unlike MRI in this case.
Area of Science:
- Neurology
- Nuclear Medicine
- Radiology
Background:
- Post-infectious cerebellitis presents with diverse neurological deficits.
- Accurate assessment of cerebellar dysfunction is crucial for diagnosis and management.
Observation:
- A 14-year-old boy with post-infectious cerebellitis underwent Tc-99m HMPAO brain SPECT and MRI.
- Clinical findings included ataxia, nystagmus, titubation, dysmetria, and dysdiadochokinesia.
Findings:
- Tc-99m HMPAO brain SPECT revealed reduced perfusion in multiple left cerebellar lobes, correlating with neurological deficits.
- MRI showed limited signal abnormalities in the left cerebellar hemisphere, not fully encompassing the clinical presentation.
Implications:
- Tc-99m HMPAO brain SPECT may offer superior assessment of cerebellar functional deficits in cerebellitis.
- This imaging modality could aid in understanding the extent of cerebellar involvement and guiding treatment.