Life-Threatening Intraventricular Rupture of Brain Abscess in a Patient With Undiagnosed Hereditary Hemorrhagic Telangiectasia.

Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant genetic condition associated with mucocutaneous and visceral arteriovenous malformations (AVMs), including pulmonary AVMs, which predispose patients to systemic paradoxical emboli that can lead to brain abscesses. Intraventricular rupture of brain abscess (IVROBA) is a feared complication with a high mortality rate. Here, we present a case with brain abscesses complicated by IVROBA and ventriculitis as the initial presentation of HHT in an undiagnosed patient. We also discuss the diagnostic and therapeutic approach that resulted in this patient's clinical improvement.