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Neurocysticercotic Calcifications and Hippocampal Sclerosis: A Case-Control Study
Mateus de Oliveira Taveira1, Marcia Elisabete Morita2, Clarissa Lin Yasuda2
1School of Medical Sciences, University of Campinas-UNICAMP, Campinas, SP, Brazil.
Plos One
|July 2, 2015
Summary
Calcified neurocysticercotic lesions (CNLs) are strongly associated with mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS). Patients with CNLs are 11 times more likely to have MTLE-HS, but not other epilepsy types.
Area of Science:
- Neurology
- Infectious Diseases
- Epileptology
Background:
- The role of calcified neurocysticercotic lesions (CNLs) in epilepsy remains debated.
- Previous studies suggest an association between CNLs, epilepsy, and mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS), but lack robust statistical evidence.
- The odds ratio for these associations has not been clearly established.
Purpose of the Study:
- To assess the likelihood of developing MTLE-HS versus other epilepsy forms in patients with CNLs.
- To provide statistical evidence and odds ratios for the association between CNLs and specific epilepsy types.
- To investigate the potential role of neurocysticercosis in the pathophysiology of MTLE-HS.
Main Methods:
- A case-control study including 119 epilepsy patients and 106 headache controls.
- Patients were categorized into MTLE-HS, other epilepsies, and controls.
- Brain CT scans were used to identify CNLs, and logistic regression analyzed associations.
Main Results:
- CNLs were present in 31.09% of epilepsy cases versus 11.32% of controls (p<0.001).
- CNLs were significantly associated with MTLE-HS (OR = 11.27; p<0.001), but not with other epilepsy types.
- No significant differences in CNL load or location were observed across groups.
Conclusions:
- CNLs significantly increase the odds of having MTLE-HS by approximately 11 times.
- The presence of CNLs does not alter the likelihood of developing other forms of epilepsy.
- These findings suggest a potential pathophysiological role for neurocysticercosis in MTLE-HS, warranting further investigation.
