03.01 Radiology: Imaging of Common GI Disorders Flashcards Preview

Gastrointestinal > 03.01 Radiology: Imaging of Common GI Disorders > Flashcards

Flashcards in 03.01 Radiology: Imaging of Common GI Disorders Deck (101)
Loading flashcards...
1

Accumulation of modified opacities throughout the segments of the colon which represent fecal material

Mottled densities

2

Abundant mottled densities
Presents with constipation

Fecal retention/stasis

3

Abundance of gas in small and large bowels
Generalized gas-filled distention
Impaired propulsion of GI contents > hypomotility of GI tract in the absence of mechanical bowel obstruction > accumulation of gas in the bowels > distention

Ileus/hypomotility

4

Bowel gas has not resolved after more than 3 days

Paralytic ileus

5

Collection of gas in one area
Focal inflammation in a given region
Inflammation at the epigastric region or RLQ

Sentinel loop

6

in large bowel obstruction, the colon is gas filled and dilated down to the level of sigmoid colon
Maybe diverticular stricture

Cut-off sign

7

Intra-abdominal inflammation, such as with pancreatitis, can lead to a localized ileus

Sentinel loop

8

Closed loop obstructions
Abundance of gas-filled bowel loops in the center of the abdomen
Valvulae conniventes/plicae circulares are evident
Intermittent abdominal pain, vomiting, RUQ mass

Coiled spring

9

Coiled spring pattern: without contrast

May represent obstruction

10

Coiled spring pattern with contrast

Intussusception

11

Small-bowel obstruction
Demonstrated only in upright position

Air-fluid leveling

12

Small bowel obstruction
Represents small pockets of trapped air within the superior walls of the bowel in the valvulae conniventes
Increased peristaltic activity
Ovoid appearance due to meniscal effect of fluid between the valvulae conniventes

String of pearls

13

Small bowel obstruction
Lucent areas that appear like vertical lines
Secondary to increased peristaltic activity

Stretch/slit sign

14

Obstruction at the duodenum
Stomach distention

Single bubble sign

15

Maximum normal diameter of SI

30mm

16

Maximum normal diameter of LI

50-60mm

17

Maximum normal diameter of cecum

90mm

18

Most common pathology presenting with a single bubble sign
Palpable lesion in the epigastric area among newborns
Non-bilous vomiting

Hypertrophic pyloric stenosis

19

Encountered when 2 bowel loops are involved
Obstuction beyond the stomach but probably at/around the area of the duodenum
Possible etiologies: atresia, obstuction, extrinsic compression by the region adjacent to the duodenum, periduodenal anomaly, anything that involves the distal portion of the duodenum
Presents with bilious vomiting

Double bubble sign

20

Jejunal obstruction
Encountered when there are 3 loops involved
Signify a possible obstruction on the jejunum

Triple bubble sign

21

Volvulus (twisting of loop of intestine around its mesenteric attachment)
Vomiting, alternating diarrhea and constipation

Coffee bean sign

22

Volvulus at right apex

Sigmoid volvulus

23

Volvulus at left apex

Cecal volvulus

24

Complication of intestinal malrotation
Present with bilious vomiting
Common among newborns

Midgut volvulus

25

Inflammatory focus
Secondary to a collection of abscess or an inflammatory focus
Normal, not distended gas filled bubble loops except at sudden interruption of air
Cancer, inflammation

Colon cut-off sign

26

Bowel loops in R hemiabdomen
Prominent liver shadow
Splenic flexuer is much more superior to hepatic flexure

Hematomegaly

27

Chest films are sometimes needed to confirm the possibility of a perforated gas-containing organ
Crescent shaped
Trauma, iatrogenic perforation, GI tract disease, inflammatory conditions

Pneumoperitoneum

28

Normal air under left hemidiaphragm (stomach air or gastric bubble)

Magenblase

29

Collection of air follows the configuration of bowel loops
Presence of haustrations, usually present with no symptoms, incidental finding

Chilaiditi's sign

30

Chilaiditi's sign + pain
One of the causes of pseudoperitoneum and occurs when bowel gas is interposed between the liver and the hemidiaphragm resulting in pain

Chilaiditi's syndrome