(11)C-Methionine uptake in secondary brain epilepsy

Area of Science:

• Neurology
• Nuclear Medicine
• Oncology

Background:

• Carbon-11 methionine (¹¹C-Methionine) is a PET tracer primarily used for brain tumor imaging.
• Its application in non-malignant conditions, particularly seizures, is less explored.
• ¹¹C-Methionine may complement ¹⁸F-Fluorodeoxyglucose (¹⁸F-FDG) in specific neurological diagnostics.

Observation:

• A 57-year-old patient with bladder carcinoma experienced epileptic seizures due to brain metastasis.
• Positron Emission Tomography (PET) using ¹¹C-Methionine was performed.
• The scan revealed metastatic recurrence and diffuse tracer uptake in surrounding cerebral areas, linked to seizure activity.

Findings:

• ¹¹C-Methionine PET successfully identified recurrent brain metastasis.
• The tracer uptake pattern correlated with the patient's seizure status (comitial status).
• Post-surgical removal of the metastasis led to complete symptom resolution and cessation of seizures.

Implications:

• This case suggests ¹¹C-Methionine PET can be a valuable tool for evaluating seizure disorders, especially in oncology patients.
• It offers potential diagnostic insights beyond conventional oncologic imaging.
• Further research into ¹¹C-Methionine's role in non-malignant neurological conditions is warranted.