Cavernous Malformation Management, Thalamic Infarct Subtypes, and Lacunar Stroke Neuroanatomy
This session covers the complications and management of cerebral cavernous malformations, bleeding risk predictors, and then transitions to the neuroanatomy of stroke subtypes including the four thalamic infarct territories and their distinct clinical presentations.
Practitioner-Guided Note
Cavernous malformation surgery is reserved for cases with significant mass effect, major extralesional hemorrhage, or recurrent bleeding. Radiosurgery is controversial and generally not recommended. Brainstem location and prior hemorrhage or focal symptoms are the strongest predictors of future bleeding. Anterior temporal lobe involvement on MRI is a key CADASIL indicator. Posterior thalamic infarction characteristically produces quadrantanopia.
Key Takeaways
Cavernous malformation complications: seizures, hemorrhage, neurological deficits (even without visible hemorrhage on imaging).Management: anti-seizure medications for seizures; surgery reserved for significant mass effect, major extralesional hemorrhage, or recurrent bleeding.Radiosurgery for cavernous malformations is controversial and generally not recommended.Strongest bleeding risk predictors: brainstem location, prior hemorrhage or focal symptoms.Age, sex, and multiplicity do not predict future bleeding risk.Paramedian thalamic infarction: altered consciousness, behavioral changes, memory loss, vertical gaze palsy, contralateral ataxia.Lateral thalamic infarction: hemisensory loss, ataxia, thalamic pain syndrome, visual field deficits.Anterior thalamic infarction: apathy, memory impairment, hemispatial neglect, emotional facial paresis.Posterior thalamic infarction: sensory loss, aphasia, abnormal movements, quadrantanopia.