Idiopathic chronic temporal lobe herniation with associated epilepsy

Area of Science:

• Neurology
• Neurosurgery
• Radiology

Background:

• Parahippocampal gyrus herniation typically results from intracranial pressure differentials.
• Herniation without identifiable risk factors is exceptionally uncommon.

Observation:

• A patient with a history of seizures and status epilepticus presented with a presumed left temporal lobe tumor on MRI.
• Neurosurgical evaluation revealed the lesion to be a chronic mesial temporal lobe herniation.

Findings:

• The patient had no history suggestive of cerebral herniation risk.
• Radiographic identification of chronic temporal lobe herniation was crucial.

Implications:

• Accurate diagnosis prevented unnecessary surgical intervention, such as biopsy.
• Conservative management was initiated, tailored to the correct diagnosis of chronic herniation.