GI Section 1: Large Bowel/Rectum (Crohns vs UC)

Question 1

Crohns Disease

Answer 1

Young adult
Discontinuous involvement of the entire GI tract (mouth -> asshole).
Duodenal involvement is rare, never occurs without antral involvement

Question 2

An early manifestation from obstructive lymphedema

Answer 2

Squaring of the folds

Question 3

Discontinuous involvement of the bowel

Answer 3

Skip lesions

Question 4

Separation o f the loops caused by infiltration o f the mesentery, increase in mesenteric fat and enlarged lymph nodes

Answer 4

Proud loops

Question 5

Irregular appearance to bowel wall caused by longitudinal and transverse ulcers separated by areas of edema

Answer 5

Cobblestoning

Question 6

Islands of hyperplastic mucosa

Answer 6

Pseudopolyps

Question 7

Post-inflammatory polyps - long and worm-like

Answer 7

Filiform

Question 8

Found on anti-mesenteric side. From bulging area of normal wall opposite side of scarring from disease

Answer 8

Pseudodiverticula

Question 9

Marked narrowing of terminal ileum from a combination of edema, spasm, and fibrosis

Answer 9

String-sign

Question 10

Inflammatory Bowel Diseases are Associated with an Increased Risk of?

Answer 10

Melanoma

Question 11

Ulcerative Colitis

Answer 11

Young adult + male
involves rectume (95%) with retrograde progression
NO SKIP LESIONS - continuous

Question 12

Ulcerative colitis associations

Answer 12

Colon Cancer
Primary Sclerosing Cholangitis
Arthritis (similar to Ankylosing Spondyhtis)

Question 13

Answer 13

Crohns

“String sign”

Question 14

Answer 14

Ulcerative Colitis

Haustrall loss, Lead pipe appearance

Question 15

More Common In : Crohns vs UC

Answer 15

Question 16

Discontinuous “Skips”

Answer 16

Crohns

Question 17

Continuous

Answer 17

UC

Question 18

Terminal Ileum - String sign

Answer 18

Crohns

Question 19

Rectum

Answer 19

UC

Question 20

Ileocelcal valve “stenosed”

Answer 20

Crohns

Question 21

Ileocecal valve “open”

Answer 21

UC

Question 22

Mesenteric Fat Increased “creepingfat”

Answer 22

Crohns

Question 23

Perirectal fat Increased

Answer 23

UC

Question 24

Lymph nodes are usually enlarged

Answer 24

Crohns

Question 25

Lymph nodes are NOT usually enlarged

Answer 25

UC

Question 26

Makes Fistulae

Answer 26

Crohns

Question 27

Doesn’t Usually Make Fistulae

Answer 27

UC