Hypothalamic hamartoma

Case contributed by Samantha Scott
Diagnosis certain


Gelastic seizures.

Patient Data

Age: 3 years
Gender: Male

MRI of the brain shows a lobular mass centered at the tuber cinereum. The mass is solid and isointense to gray matter on all sequences without evidence of enhancement. The mass abuts the optic chiasm and gently molds against the dorsum sella. Posteriorly, the mass splays the cerebral peduncles. The mass contacts the optic tracts superolaterally and mildly elevates the third ventricle.

Case Discussion

This is the typical appearance of a hypothalamic hamartoma on MRI which was proven pathologically following biopsy.

Co-Author: Daniel P. Gewolb, MD

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