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CT Flashcards

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1
Q
A

Dermoid Cyst

Other DDX: Meningocele

  1. Failure for the neuro and ectoderm to separate
  2. Tract along the midline of the nasal planum
  3. Sometimes creates an abscess in the calvarium
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2
Q
A

Ossifying nasal polyp

  1. Carcinoma
  2. extra-skeletal osteosarc
  3. MLO
  4. osteochondroma
  5. Harmatoma
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3
Q

Young cat

A

Polyp.

  1. Rim enhancing
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4
Q
A

Destructive rhinitis - Fungal

  1. Thickening of the mucosa
  2. Thickening of the overlying bone (hyperostosis)
  3. Lysis and cavitations
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5
Q
A

Fungal - Apergillus

Hyperosteosis

Cavitations

Lysis

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6
Q
A

Cryptococcous

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7
Q
A

Impacted tooth with aspergillus

See the nasal turbinate destruction and cavitations as well.

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8
Q

Most common neoplasm for dogs and cats in the nose?

A
  1. Cat
    1. Lymphoma
    2. Epithelieum - Carcinoma
  2. Dogs
    1. Epithelieum - carcinoma
    2. Mesenchymal - osteosarc, chondro
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9
Q
A

Harmatoma

  1. Osteosarcoma, osteochondroma, MLO, ossifying polpy, ex.
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10
Q

Post trauma

A

Hematoma secondary to trauma

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11
Q

MLO arises from?

A

TMJ and zygomatic bones

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12
Q
A

Lymphoma

Soft palate thickening. Lymphoma is the most common soft palate neoplasia in cats and dogs.

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13
Q
A

Dentigerous cysts

Associated with unerrupted teeth enamel (tops) usually in brachycepalic dogs (first premolar)

Radicular cyst comes from the tooth root.

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14
Q
A

OCD of the TMJ

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15
Q
A

Juviniel Mascitory muscle myositis.

Common in Cavies

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16
Q

What disease in cats can cause endoopthalamistis

A

FIP

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17
Q
A

Bilateral extraocular myositis

  1. Swelling of the extraocular muscles
  2. Common in goldens
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18
Q
A

Zygomatic sialoadenitis or abscess

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19
Q

Old cat

A

Feline restrictive orbital myofibroblastic sarcoma (FROMS)

  1. Middle age to old adult
  2. Can cause orbital lysis
  3. Loss of retrobulbar fat layers with diffuse soft tissue proliferation.
  4. Scleral and episcleral thickening of the eyeb
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20
Q
A

Sialoliths

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21
Q
A

Dacryops

  1. Cyst of the nasolacrimal duct.
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22
Q
A

Chronic dacryocystitis

  1. Bony proliferation
  2. Lysis
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23
Q
A

arural cholestrosteatoma - bilateral

  1. Commonly bilateral
  2. They are epidermoid cysts actually.
  3. Expansile with mixed echogenic/lytic
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24
Q
A

SCC of the ear

  1. This is just an aggressive osseous lesion of the ear and SCC is the most common in cats (ceruminous gland adenocarcinoma)
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25
Occipital dyplasia (keyhole malformation) 1. The dotted line represents where the occipital bone should go.
26
Open fontenelles with mild meningocele and hydrocephalus
27
Chronic fracture with sequestrum and chronic osteomyelitis. Sequestrum Cloaca INVOLUCRUM - Periosteal new bone making a volcano.
28
Young westie
CMO 1. No lysis 2. Labs, dobies and bullmastifis can get it
29
Bullmastif
Calvarial hyperostosis 1. Can have eosinophilia 2. Can have lymphadenopathy.
30
MLO 1. Commonly invades 2. BC is surgerically put there after previous removal 3. Zygomatic arch and calvarium Osteomas are usually slow growing smoothly marginate that don't cause lysis and can be in the sinus
31
Nasopharyngeal stenosis
32
Most common pharyngeal neoplasia in the dog? Cat?
Dog 1. Melanoma 2. SCC 3. Fibrosarc Cat 1. Lymphoma
33
Most common laryngeal neoplasia in the dog? Cat?
Dog 1. Carcinoma 2. Rhabdo Cat 1. Lymphoma 2. SCC
34
Young cat
Nasopolyp
35
Wooden foreign body 1. Often located in the facial planes in an area from C1 to C4 2. Well defined
36
Laryngeal mass: SCC vs lymphoma
37
Bacterial meningitis secondary to dog bite.
38
1. Epidural - biconvex - doesn't cross sutures 2. Subdural - Moon shape - crosses sutures but not longitudinal fissue or os tentorium 3. Subarachnoid goes into the sulci.
39
intracranial arachnoid diverticulum of the quadreminal cistern.
40
Remember what pituitary apoplexy is.
Pituitary tumor where sudden bleeding or hemorrhage occurs
41
What is a craniopharyngioma? Suprasellar germ cell tumor?
Craniopharyngioma is a benign neoplasm that is derived from epithelial remnants of the oropharyngeal ectoderm of Rathke’s pouch. Both occur in young adult to middle - aged animals, are often very large and grow along the ventral aspect of the brain Craniopharyngioma = stalk like shape (picture)
42
Dog with facial paralysis
Expansile nature of the internal acoustic meatus. Facial nerve PNST is considered.
43
Three different large breed dogs
Cervical spondylomyopathy
44
Osteochondroma Or multiple cartilageous chondromatosis Note the cortex and medulla are well formed, and therefore this is considered most likely
45
OCD of the sacrum
46
Discospondylitis
47
Intraspinal articular cyst * subdivided in ganglion cysts, synovial cysts and cysts arising from ligaments and intervertebral disk
48
What are the most common neoplasms of the spine? Extradural, intramedullary and intradural?
1. Extradural 1. Primary bone tumor 2. Mets 2. Intrameduallary 1. Glioma 2. Lymphoma - cat 3. Intradural extramedullary 1. Meningioma 2. Neurofibrosarcoma 3. Lymphosarcoma 4. Nerve root neoplasia 5. Nephroblastoma
49
This picture is showing a pneumo causing compression of the CVC and the left vertebral sinus enlarged secondary to alternative venous return
50
Gas in the CVC and mineralization of the aorta. Both incidental.
51
90% are persistant right aortic arch.
52
A. Aneurysm B. Pseudoaneurysm C. Stenosis D. Dissection
53
Tracheitis
54
Lymphoma Contrast enhancement mass.
55
Mediastinitis 1. Widening and irregular 2. Increased attenuation 3. CE maybe
56
Spirocercosis 1. Stomach to aorta to esophagus 2. Caudal mediastinal or hilar mass 3. Fluid filled rim enhancement = benign 4. Heterogeneous enhancement and soft tissue = malignant transformation
57
Spirocercosis with thrombi and aneursymic dilation
58
10 mo old dog
Paraesophageal cyst 1. Mostly in the cranioventral mediastinum 2. Thin rimmed 3. Can be associated with any structure pleural, branchial, thymic, lymphatic, bronchogenic or neoplastic origin
59
What are the five types of atelectasis?
Weird things: ARDS can cause this and so can O2 supplementation
60
Bronchopneumonia Broncheal wall thickening, consolidation.
61
Suspect FB with focal abscessation and focal pneumonia
62
bacterial pneumonia. Just know it is pneumonia
63
Granulomatous disease... look at the lymph nodes... distribution and mass
64
Multiple infarcts think vasculitits and tick borne diseases.
65
Emphysematous Cholecystitis
66
Shinny skin and alopecia is secondary to what type of tumor?
Pancreatic exocrine tumor (adenocarcinoma) Airedale, labs
67
leiomyoma or sarcoma
68
ureterocele
69
Parosteal osteosarc... just less aggressive.
70
Bony infarct
71
ocd of the shoulders, elbow and stifle
72
Sequestrum
73
synovial osteochondromatosis
74
Stenosing tenosynovitis of the abductus pollicus longus m.
75
Greyhound
Enesthopathy of the short radial collateral ligament
76
Long digitial extensor tendon injury 1. sclerosis of the lateral epicondyle of the femor. 2. Avlusion Giant breed dogs. Trauma
77
Ameloblastoma
78
Ossifying fibroma in young horse
79
Masses in a horses nose... think what?
Cyst, hematoma, neoplasia (SCC, Sarcoid, melanoma), fungal (aspergillus).
80
What breed of horse gets cerebellar atrophy?
Arabians
81
Dentigerous cyst (ear tooth)
82
TMJ sepsis Commonly associated with a fistulous tract. Cause is unknown.
83
Temporohyoid osteoarthropathy Look for fractures.
84
Cholesterinic granuloma
85
Enthesopathy of the nuchal ligament Jumpers and dressage horses.
86
Fracture of the central tarsal bone. Note the sclerosis
87
Salter harris fracture of the medial aspect of the radial physis Note the extension of the physis medially with new bone Note the sclerosis. Note the asymetry of the epiphysis.
88
Fracture of the sustentacular tali of the calcaneus
89
DDF lesion with concurrent navicular bursa effusion
90
Distal interphalangeal desmitis/tendinopathy Note the osseous reabsorption
91
cyst-like lesion secondary to trauma

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