Items tagged “brain”

Developmental venous anomaly (DVA), also known as cerebral venous angioma, is a congenital malformation of veins which drain normal brain. They were thought to be rare before cross-sectional imaging but are now recognized as being the most common cerebral vascular malformation, accounting for ~5...

Ependymomas represent a relatively broad group of glial tumors most often arising from the lining of the ventricles of the brain or the central canal of the spinal cord. They account for ~5% of all neuroepithelial neoplasms, ~10% of all pediatric brain tumors and up to 33% of brain tumors occurr...

Obstructive hydrocephalus is a term usually used to denote obstructive non-communicating hydrocephalus.  It is actually a term that causes confusion as used in the above sense implies that communicating hydrocephalus does not have an obstruction to CSF flow/absorption; this is not true as the m...

Pituitary apoplexy is an acute clinical condition caused by either hemorrhagic or non-hemorrhagic necrosis of the pituitary gland. Although presentation is variable, it typically comprises headache, visual deficits, ophthalmoplegia, and altered mental status. An existing pituitary macroadenoma i...

Subependymomas are uncommon, benign (WHO grade 1) tumors which are slow-growing and non-invasive. They tend to occur in middle-aged and older individuals and usually identified as an incidental finding.  Terminology These tumors were previously also known as subependymal astrocytomas, not to b...