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Left thalamomegaly in a patient with partial epilepsy
Giacomo Della Marca1, Catello Vollono, Diana Ferraro
1Department of Neurosciences, Catholic University, Rome, Italy. dellamarca@rm.unicatt.it
Clinical Neurology and Neurosurgery
|December 22, 2007
Summary
Temporal lobe epilepsy (TLE) can alter thalamic structure. This case study highlights unusual thalamic enlargement contralateral to the seizure focus in a patient with epilepsy.
Area of Science:
- Neurology
- Neuroimaging
- Epileptology
Background:
- Temporal lobe epilepsy (TLE) is frequently associated with structural and functional changes in the thalamus.
- These changes typically involve thalamic atrophy or hypometabolism, affecting one or both thalami.
Observation:
- A 28-year-old woman with epilepsy presented with unique neuroimaging findings.
- She experienced partial motor seizures on the left side, generalizing, with EEG indicating a right temporal epileptic focus.
- Serial neuroimaging over 11 years revealed a non-progressive enlargement of the left thalamus.
Findings:
- 18-FDG PET scans demonstrated reduced metabolic activity in the right temporal gyrus and the ipsilateral thalamus.
- The patient exhibited thalamic asymmetry, specifically left thalamomegaly contralateral to the right temporal epileptic focus.
Implications:
- This case presents an unusual finding of thalamic enlargement in TLE, contrasting with typical atrophy.
- Thalamic asymmetry in epilepsy may represent an occasional, rather than a consistent, neuroimaging finding.
- Further research is needed to understand the mechanisms and clinical significance of such thalamic alterations in TLE.
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