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Intraventricular meningiomas are rare but typically occur around the choroid plexus in the trigone of the lateral ventricles.
This artery, which supplies the trigone of the bladder, occurred in 48 of 66 bodies.
The computed tomography said it all; a malignant intrinsic tumour at the trigone of the lateral ventricle, probably a glioblastoma.
It can appear as a solid infiltrative lesion or as a polypoid intraluminal mass that arises in the base of the bladder or in the region of the bladder trigone .
Because the urethra and trigone are estrogen-dependent tissues, estrogen deficiency can contribute to urinary incontinence and urinary dysfunction.