What is the mixed vascular malformation?
A mixed vascular malformation is a relatively common congenital cerebral vascular malformation, most frequently composed of a developmental venous anomaly (DVA) and a cavernous malformation.
Why you should inform the surgeon of the presence of mixed vascular malformation?
In mixed vascular malformation you should inform the surgeon of the presence of a DVA, as cautery of the collecting vein can lead to venous infarction of the brain parenchyma it drains.
Small heterogeneous lesion measures about 1 x 1 cm, involving the left side of the corpus callosum splenium, it shows heterogeneous signal intensity, with complete T2 hypo-intense hemosiderin rim, and surrounded by avid blooming artefact on SWI (hemorrhage), without evidence of enhancement or restricted diffusion.
There is evidence of blood in the occipital horn of the lateral ventricle, third ventricle and fourth ventricle, associated with dilatation of lateral and third ventricles.
Minimal sub-ependymal edema is noted.