VRU 2019 Flashcards
What is the most common differentials for enlarged parathyroid?
- Adenoma
- Hyperplastic glands
- Adenocarcinomas are less likely
What echogenicity was adenocarcinoma in the parathyroid gland?
Heterogeneous rather than homogeneous.
Should size (3-4mm) be the cut off for parathyroid glands?
No… normals have been seen up to 7mm
Is it useful to repeat CTA when looking to see if pancreatitis has worsen in dogs?
No… nothing really changes.
This was because in humans pancreatic necrosis is usually noted 24-48 hours after first complaint and therefore repeating CTA can help with looking for necrosis in this window if the first CTA was performed immediately. Pancreatic necrosis holds a shitty prognosis so it is good to note this.
Is the frequency of gas in the pylorus and duodenum increased with three views in cats?
No it does not
What is the normal liver length:length of thoracic vertebrae in cats?
4.2 +/- 0.5
Does the liver length:length of thoracic vertebrae in cats correlate with CT liver volume?
Yes
Why should the length:length of thoracic vertebrae in cats not be performed in cats under 1 year old?
They have not attained full vertebral growth
Radiographs are more or less sensitive than CT when assessing patients for blunt thoracic trauma?
Less sensitive - For detecting rib fractures, pneumo, contusions and pleural effusion
Radiographs overestimated what when compared to CT when assessing patients for blunt thoracic trauma?
Severity of lung contusions.
What phase of contrast is best for visualizing thymomas on CT?
Delayed
What is the difference in appearance of large thymomas vs small?
Large thymoma - cystic, heterogenous and vascular invasive — more likely to reoccur
Small thymoma - homogeneous
What are post operative complications and incomplete tumor resection associated with what, when discussing thymomas?
Shorter outcomes (died earlier)
What is the HUs for the overall attenuation of a gallbladder mucocele vs sludge vs normal gallbladder?
Mucocele: 49HU
Sludge: 40 HU
Normal: 36 HU
This makes precontrast images the best to differentiated
Where is mineral commonly located in a gallbladder with a mucocele? Is this a common spot to see mineralization in a normal gallbladder or one with sludge?
In the center… no, only mucoceles have this distribution
What is the perioperative mortality with GB removal?
27%
How much more likely are ruptured gallbladder mucocele patients to die perioperatively than non-ruptured?
3x more
JVIM 2018: what was the sensitivity in US finding a ruptured gallbladder mucocele?
56%
Holland et al: Aortic./CVC ratio in dogs with systemic hypertension, what was the ratio for normal dogs vs hypertensive dogs?
- 0 for normal
- 5 for systemic hypertension dogs.
Lamb et al: Prevalence of pulmonary nodules on CT, What neoplastic etiology was most likely to have pulmonary mets on CT?
Hemangiosarcoma (41% of dogs with hemangio had mets)
Osteosarcoma (26% of dogs with osteosarc had mets)
Carcinoma (25%…)
Histiocytic (24%…)
STS (23%….)
Lamb et al: Prevalence of pulmonary nodules on CT, What neoplastic etiology was least likely to have pulmonary mets (nodules) on CT?
Mast cell tumor (4% of dogs with mast cell tumor had pulmonary nodules)
SCC (none)
Lamb et al: Prevalence of pulmonary nodules on CT, When only one nodule was found how many disappeared or did not change on follow up CT (out of 9 dogs)?
5/9 either disappeared of did not change
(median period of 188 days)
(range 14-1821)
Schlacks et al: CT Pulmonary cryptococcosis, What are differentials for pulmonary mineralized mass in a cat?
Neoplasia
Pyoggranulomatous (Coccidiodes, cryptococcus, toxo, parasitic and Mycoplasma)
Schlacks et al: CT Pulmonary cryptococcosis, What is the difference in distribution of cryptococcsis in cats vs horse?
Horse commonly have pulmonary granulomas while cats normal just infect the nasal passage.
Schlacks et al: CT Pulmonary cryptococcosis, what was interesting about this case?
The mass infiltrated the lumen of the trachea… This has not been reported.
What are the signs of a lung lobe torsion?
Increased lobar opacity
Vesicular gas
Displaced lung lobe
Bronchial opacification
Mediastinal shift
Tracheal displacement
Axial rotation of the carina
Pleural effusion
Youngest lung lobe torsion noted in a dog?
7wks old
Benavides et al: Lung lobe torsion, What was the most common lung lobes affected?
Right middle
Left Cranial
Benavides et al: Lung lobe torsion, what was the most common radiographic sign?
Consolidation
Pleural effusion
Benavides et al: Lung lobe torsion, Does not having pleural effusion rule out lung lobe torsion?
NO
Benavides et al: Lung lobe torsion, what type of dog had significantly improved survival?
Small breed dogs.
Hamlin et al: US characteristics of feline TCC, Where is Tcc commonly located in cats?
Mid-body or apex of the bladder (70%)
Hamlin et al: US characteristics of feline TCC, What was less likely to happen in cats than in dogs with TCC?
Cats are less likely to have urethral extension than dogs
More likely to be single mass
Otherwise the characteristics are pretty much the same.
Hamlin et al: US characteristics of feline TCC, Was sublumbar lymphadenopathy common in cats?
Yes, similar to dogs
Williamson et al: MRI syringobulbia, What is syrringobulbia?
One or more fluid-filled cavitties within the brainstem (medulla).
Slits and Bulbous (congential) - and acquired
Williamson et al: MRI syringobulbia, Where does syringobulbia usually occur? And what age of dogs? And what size of dog?
Medulla Oblongata
Young
Small breed dogs
Williamson et al: MRI syringobulbia, What two types were seen?
Slit-like
Bulbous
Williamson et al: MRI syringobulbia, What MRI signal characteristics is the syringobulbia?
Same as CSF
Williamson et al: MRI syringobulbia, what did most syrinobulbias communicate with?
Fourth ventricle
Williamson et al: MRI syringobulbia, Can syringobulbia cause clinical signs?
Most dogs presented with vestibular disease that was attributed to the syringobulbia - attributed to medualla region
Thierry et al: CT appearance of canine tonsillar neoplasia, What is the most frequent type of neoplasia in the tonsils?
- SCC
- Melanoma
- Lymphoma
Thierry et al: CT appearance of canine tonsillar neoplasia, What is a common concomitant feature of tonsilar neoplasia regarding the lymph nodes?
Marked enlargment (>18mm in width on transverse CT)
Heterogeneity
Loss of hypoattenuating hilus (picture is normal hilus)
Thierry et al: CT appearance of canine tonsillar neoplasia, Does having little or no enlargemnt of the tonsil rule out tonsillar neoplasia?
NO… 5/12 dogs had little or no tonsillar enlargement despite having metastatic lymphadenopathy..
Lymphadenopathy is key to this disease process and if you see it you need to have tonsillar neoplasia on the list.
Thierry et al: CT appearance of canine tonsillar neoplasia, What lymph nodes are commonly affected?
Medial retropharyngeal - most common
Mandibular
Deep cervical
Recommend sampling all in suspect tonsillar neoplasm
Thierry et al: CT appearance of canine tonsillar neoplasia, What differentials should be considered for tonsillar enlargement without lymphadenopathy?
Tonsilar polyp
Hyperplasia
Tonsillitis
Neoplasia
Kadic et al: Rare Osteochondrosis lesion of DIRT; What view is needed to pick out the medial aspect of the distal intermediate ridge of the tibia to look for OCD?
D10L-PMO
Kadic et al: Rare Osteochondrosis lesion of DIRT; What is the normal radiographic projection that a normal DIRT lesion is picked up at?
LM
D45M-PL0.
Kadic et al: Rare Osteochondrosis lesion of DIRT; What are the most common sites for OC in the tarsus?
DIRT
Lateral trcohlear ridge of the talus
Medial malleolus
Others - Medial trochlear ridge of the talus, Lateral malleolus and proximal tubercle of the talus.
Kadic et al: Rare Osteochondrosis lesion of DIRT; In retrospect what could be seen on the D45MPLO and LM that indicated the medial DIRT lesion?
Reduced opacity of the medial aspect of the distal intermediate ridge.
Kadic et al: Rare Osteochondrosis lesion of DIRT; What part of the DIRT is most commonly affected by OC?
Lateral
Craniodistal.
Hughes et al: CT Splenic torsions Dog; What is contrast enhancement defined as?
>10HU increase
Hughes et al: CT Splenic torsions Dog; What is this sign called?
Whirl-sign = splenic torsion.
This is what it looks like on transverse images
Hughes et al: CT Splenic torsions Dog; What are the CT signs of splenic torsion?
Homogeneous and round spleens
C-shape with no predication for direction or lateralization
No splenic enhancement (Mean average +1.15)
Median precontrast attenuation of 51.1HU
Whirl sign
Abdominal free fluid (31 HU = hemoabdomen)
Normal LN
Hughes et al: CT Splenic torsions Dog; what differentiated partial torsions from torsions?
Partial enhancement.
Edwards et al: Cholesterinic granuloma CT horse; what percentage of the scanned population had these cholesterinic granulomas?
16%
Edwards et al: Cholesterinic granuloma CT horse; were neurologic signs associated with the presence of these granulomas or the lateral ventricle height?
NO
Edwards et al: Cholesterinic granuloma CT horse; What was found in 1/3 of the population of horses with cholesterinic granulomas?
Mineralization of the fourth ventricle.
Edwards et al: Cholesterinic granuloma CT horse; This is a young or old horse disease?
Old <15 yo