CNS CA Flashcards Preview

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Flashcards in CNS CA Deck (18):
1

cns CA location

-80% brain
-20% spinal cord

2

most common adult brain tumor

GBM (50% in adults)

3

cns blood supply

-internal carotid arteries
-vertebral arteries
-circle of willis

4

cns xrt of vert body ant/post

-most ant portion of vert body
-8.5 cm from post surface

5

cord compression results from what CA?

-lung
-brst
-lymphoma
-prost ca

6

pituitary ca XRT field arrangement

usu 3 flds= lats & vertex

7

emtpy sella syndrome results in doses above ? for pituitary CA

50Gy +

8

vertex for pituitary field should enter

above & behind eyes

9

typical whole brain dose

35 Gy (250 x 14)

10

astrocytoma location in children

cerebellum

11

astrocytoma dose partial brain

-60 Gy
-1.8-2/fx

12

astrocytoma typical margin around gtv

2-3 cm margin

13

overproduction of ACTH from pituitary tumor is related to ? disease

cushing's disease

14

pituitary XRT option?

gamma knife (SRS)

15

pituitary CA XRT field size

6x6 fld

16

pituitary CA XRT ant border

ant sella turcica

17

pituitary CA XRT sup border

1.5-2 cm above sella

18

pituitary CA XRT inf border

mastoid tip