CNS-tumors Flashcards
what is a glioblastoma multiforme
malignant high grade tumor of astrocytes seen in adults
what tumor crosses the corpus callosum?
“butterfly lesion”
gliobastoma multiforme
what 2 CNS tumors are GFAP positive
glioblastoma multiforme
pilocytic astrocytoma
what CNS tumor is associated with estrogen and seen in women
meningioma
what is a meningioma
benign tumor of the arachnoid cells
what does the histology of a meningioma show
psammoma bodies & whorled pattern
what tumor frequently involves cr n 8 leading to hearing loss and tinnitus
schwannoma at the cerebellopontine angle
what CNS tumor has cells that are S-100 positive
schwannoma
what disease do you see bilateral schwannomas?
neurofibromatosis type II
what tumor has cells that have a “fried egg” appearance?
oligodendroglioma
how does the imagining of a pilocytic astrocytoma look
cystic lesion with a mural nodule
what are rosenthal fibers and what tumor are they seen in
thick eosinophilic processes of astrocytes
seen in pilocytic astrocytomas
where are the malignant cells in a medulloblastoma tumor derived from?
cerebellar neuroectoderm
what are “drop metastases” that are seen in medulloblastoma?
metastasis to the cauda equina
what tumor has characteristic “perivastcular pseudorosettes”
ependymoma seen in kids
what tumor
“arises from epithelial remmnants of rathkes pouch”
craniopharyngioma
what tumor
“calcifications are commonly seen on imaging”
craniopharyngioma
