Brain Tumors

Question 0

Meningioma

Answer 0

Benign
Arise from arachnoid cells
Occur on surface of brain and parasagittal region
May have dura tail
Whorled pattern
Psammoma bodies

Question 1

Glioblastoma

Answer 1

1 yr medium SR
Found in cerebral hemisphere
+ for GFAP stain
Pseudopalisading

Question 2

Schwannoma

Answer 2

Found at cerebellopontine angle
S-100 +
Localized to CN7&raquo_space; acoustic schwannoma
Neurofibromatosis type 2

Question 3

Hemangioblastoma

Answer 3

Von Hippel Lindau syndrome
Occur in cerebellum
Cause 2 deg polycythemia
Renal cell carcinoma
Foamy cell
High vascularity

Question 4

Oligodendroglioma

Answer 4

Chicken wire capillary pattern
Fried egg cells
Slow growing
Found in frontal lobes

Question 5

Pituitary adenoma

Answer 5

Most commonly prolactinoma
Causes bitemporal hemianopia
Due to pressure on optic chiasm

Question 6

Pilocytic astrocytoma

Answer 6

GFAP +
Benign good prognosis
Rosenthal fibers

Question 7

Medulloblastoma

Answer 7

Malignant cerebellum tumor
Compress 4th ventricle&raquo_space; hydrocephalus
Homer wright rosettes

Question 8

Ependymoma

Answer 8

Found in 4th ventricle&raquo_space; hydrocephalus

Perivascular rosettes

Question 9

Craniopharyngioma

Answer 9

Derived from Rathke pouch
Cause bitemporal hemianopia
Mcc of child supratentorial tumor