A 23-year-old woman comes to the physician because of a 2-month history of episodic headaches associated with dizziness, nausea, and vomiting. Over-the-counter pain medications have failed to reduce her symptoms. An MRI of the brain shows isolated dilation of the left lateral ventricle. This dilatation is most likely caused by blockade of which of the following structures?
The interventricular foramina (foramina of Monro) drain ventriculomegaly may occur as a complication of CNS infection, neoplastic changes, or congenital defects, primarily during childhood. Idiopathic cases, on the other hand, have only rarely been described. Affected individuals may have signs of increased , e.g., chronic headache.from the lateral ventricles to the centrally located third ventricle. Thus, one-sided obstruction of either channel leads to dilation of the corresponding lateral ventricle and the associated mass symptoms in this patient. Unilateral
The only available treatment options are neuroendoscopic septostomy or foraminoplasty, both of which can reduce symptoms. However, it appears that the reduction of ventricular size does not affect clinical outcome.