GI CA

Question 1

esophageal histology upper/mid

Answer 1

SCC

Question 2

esophageal CA mets to

Answer 2

• liver
• lung most common
• hematogenous spread

Question 3

esoph CA tx planning- most common fields

Answer 3

3 fld (ap + wedged obl)

Question 4

stomach CA histology

Answer 4

adenocarcinoma

Question 5

stomach CA tx planning fields used

Answer 5

AP/PA

Question 6

stomach CA dose

Answer 6

45 Gy; if boost= 50-55 Gy

Question 7

panc CA pathology

Answer 7

adenocarcinoma 80 %

Question 8

panc CA tx surgery

Answer 8

pancreaticoduodenectomy (whipple)= head, duodenum, distal stomach, gallbladder, CBD removed

Question 9

panc CA tx planning field orientations

Answer 9

• 4-fld
• imrt
• ap/pa for head of panc

Question 10

panc location

Answer 10

retroperitoneally at L1-2

Question 11

panc XRT dose

Answer 11

45-50 Gy

Question 12

panc CA best test

Answer 12

spiral CT scan

Question 13

colorec pathology

Answer 13

• adenocarcinoma- 90-95%
• mucinous adenocarcinoma
• signet-ring cell carcinoma
• SCC

Question 14

colorec main critical structure

Answer 14

small bowel

Question 15

colorec tx planning typical field arrangement

Answer 15

3 fld- pa & lats (wedges)

Question 16

rectum dose pre or post op

Answer 16

45Gy pre/post op

Question 17

colorec staging system

Answer 17

duke’s

Question 18

anal CA path

Answer 18

SCC MOST COMMON; basaloid or cloacogenic CA- dentate line; adeno; SCC or BCC perianal region

Question 19

anal CA flds

Answer 19

• traditionally 4 fld or ap/pa

- now imrt

Question 20

esophageal CA prognosis

Answer 20

poor prog- cure rate < 10%

Question 21

esophageal histology distal

Answer 21

adenocarcinoma

Question 22

esoph CA tx planning margins above & below

Answer 22

5cm above & below tumor

Question 23

stomach CA tx planning fld margins

Answer 23

3-4 cm around tumor