Trigonal Cavernoma with Developmental Venous Anomaly Causing Intraventricular Haemorrhage: A Once in Blue Moon Association

Intraventricular cavernomas are rare lesions with a high propensity for intraventricular hemorrhage and rehemorrhage. Those located in the trigone of the lateral ventricle are even rarer with <20 cases of trigonal cavernomas reported till date. We present a case of a mixed vascular malformation, a trigonal cavernoma with associated developmental venous anomaly (DVA) causing intraventricular hemorrhage.