Hypothalamic hamartomas are very rare congenital lesions that are often associated with drug-resistant epilepsy and may first become symptomatic in this way.
Symptoms
Hypothalamic tumors typically cause gelastic epileptic seizures, which manifest as giggling or laughter. Other epileptic seizures, such as generalized tonic-clonic seizures, complex partial seizures, drop attacks, or atypical absences, have also been described. In addition to epileptic seizures, precocious puberty and psychiatric disorders have also been associated with hypothalamic hamartomas.
Associated Syndromes
The occurrence of hypothalamic hamartomas is associated with Pallister-Hall syndrome.
Imaging
The gold standard in diagnostic imaging for hypothalamic hamartomas is MRI imaging. On T1-weighted MRI, hypothalamic hamartomas appear iso- to mildly hypointense compared with the surrounding gray matter.
Classification
Hypothalamic hamartomas can be classified according to the Delalande classification.
Treatment
- Surgical: In the surgical resection of hypothalamic hamartomas, the completeness of resection correlates with seizure freedom. Possible surgical approaches include the pterional approach, transcallosal interforniceal approach, transcallosal subchoroidal approach, and endoscopic transventricular approach .
- Stereotactic radiosurgery
- Stereotactic radiofrequency ablation
References