Small Animal Abnormal GI Imaging Flashcards
When can foreign bodies be easily visible on radiographs?
Only visible if sufficiently radio-opaque
Poorly opaque FB can sometimes be seen if there is gas in the lumen of the stomach
If you are unable to see a FB on a radiograph what can you do next?
Positive contrast gastrography
What will you see on ultrasonography with a FB obstruction?
Curved or geometric interface
Strong clean acoustic shadow
What do you see on radiology in a patient with a linear FB?
-Loops of intestine bunched up
-Irregular gas lucencies; angles, tear-drop, triangle
- Corrugated, irregular contour of intestinal loops
- Possible focal loss of contrast
Can you do a GI barium study for a linear foreign body?
Yes
What will you see on ultrasonagraphy for linear FB?
Will see a shadowing elongated linear object in the lumen of the intestine. The intestine will also be plicated and bunched up.
What does a GDV look like in Left Lat?
the fundus is gas filled and ventralW
What does a GDV look like in right lat?
the pyloric antrum is gas filled and is dorsal
compartmentalization is visible
What is a sign of gastric wall necrosis?
free gas; pneumoperitoneum
What are some signs in radiographs that are highly suggestive of neoplastic disease?
- Non-specific
-Focal intestinal dilation
-Gravel sign
If you don’t see a mass on abdominal radiographs can you do a barium study?
Yes
What do you see on ultrasonography in a patient with GI neoplasia?
-Thickening of the wall
- Focal mass with loss of normal layering
- Usually hypoechoic
What types of tumors wont cause a focal mass lesion?
Small Cell Lymphoma
What can you see on radiographs in a patient with small cell lymphoma?
-Diffuse wall thickening
- Muscularis layer preferentially affected
- Ddx: IBD: biopsy necessary to discern
What would you see on ultrasoundin a patient with GI ulceration?
- Most commonly in stomach and duodenum
-Difficult to diagnose (endoscopy better) - May be seen but cannot be ruled out on ultrasound
What does intussusception look like on radiographs?
- Most commonly ileo-olic
- Sausage like soft tissue opacity
- Intussusception can be seen in the lumen of the colon when gas filled
What does intussusception look like on ultrasound?
Transverse: bulls eye appearance
Longitudinal: layered cake
