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CT Flashcards

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
Q
A

Occipital dyplasia (keyhole malformation)

  1. The dotted line represents where the occipital bone should go.
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26
Q
A

Open fontenelles with mild meningocele and hydrocephalus

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27
Q
A

Chronic fracture with sequestrum and chronic osteomyelitis.

Sequestrum

Cloaca

INVOLUCRUM - Periosteal new bone making a volcano.

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28
Q

Young westie

A

CMO

  1. No lysis
  2. Labs, dobies and bullmastifis can get it
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29
Q

Bullmastif

A

Calvarial hyperostosis

  1. Can have eosinophilia
  2. Can have lymphadenopathy.
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30
Q
A

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

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31
Q
A

Nasopharyngeal stenosis

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32
Q

Most common pharyngeal neoplasia in the dog? Cat?

A

Dog

  1. Melanoma
  2. SCC
  3. Fibrosarc

Cat

  1. Lymphoma
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33
Q

Most common laryngeal neoplasia in the dog? Cat?

A

Dog

  1. Carcinoma
  2. Rhabdo

Cat

  1. Lymphoma
  2. SCC
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34
Q

Young cat

A

Nasopolyp

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35
Q
A

Wooden foreign body

  1. Often located in the facial planes in an area from C1 to C4
  2. Well defined
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36
Q
A

Laryngeal mass: SCC vs lymphoma

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37
Q
A

Bacterial meningitis secondary to dog bite.

38
Q
A
  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
Q
A

intracranial arachnoid diverticulum of the quadreminal cistern.

40
Q

Remember what pituitary apoplexy is.

A

Pituitary tumor where sudden bleeding or hemorrhage occurs

41
Q

What is a craniopharyngioma? Suprasellar germ cell tumor?

A

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
Q

Dog with facial paralysis

A

Expansile nature of the internal acoustic meatus. Facial nerve PNST is considered.

43
Q

Three different large breed dogs

A

Cervical spondylomyopathy

44
Q
A

Osteochondroma

Or multiple cartilageous chondromatosis

Note the cortex and medulla are well formed, and therefore this is considered most likely

45
Q
A

OCD of the sacrum

46
Q
A

Discospondylitis

47
Q
A

Intraspinal articular cyst

  • subdivided in ganglion cysts, synovial cysts and cysts arising from ligaments and intervertebral disk
48
Q

What are the most common neoplasms of the spine? Extradural, intramedullary and intradural?

A
  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
Q
A

This picture is showing a pneumo causing compression of the CVC and the left vertebral sinus enlarged secondary to alternative venous return

50
Q
A

Gas in the CVC and mineralization of the aorta. Both incidental.

51
Q
A

90% are persistant right aortic arch.

52
Q
A

A. Aneurysm

B. Pseudoaneurysm

C. Stenosis

D. Dissection

53
Q
A

Tracheitis

54
Q
A

Lymphoma

Contrast enhancement mass.

55
Q
A

Mediastinitis

  1. Widening and irregular
  2. Increased attenuation
  3. CE maybe
56
Q
A

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
Q
A

Spirocercosis with thrombi and aneursymic dilation

58
Q

10 mo old dog

A

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
Q

What are the five types of atelectasis?

A

Weird things: ARDS can cause this and so can O2 supplementation

60
Q
A

Bronchopneumonia

Broncheal wall thickening, consolidation.

61
Q
A

Suspect FB with focal abscessation and focal pneumonia

62
Q
A

bacterial pneumonia. Just know it is pneumonia

63
Q
A

Granulomatous disease… look at the lymph nodes… distribution and mass

64
Q
A

Multiple infarcts think vasculitits and tick borne diseases.

65
Q
A

Emphysematous Cholecystitis

66
Q

Shinny skin and alopecia is secondary to what type of tumor?

A

Pancreatic exocrine tumor (adenocarcinoma)

Airedale, labs

67
Q
A

leiomyoma or sarcoma

68
Q
A

ureterocele

69
Q
A

Parosteal osteosarc… just less aggressive.

70
Q
A

Bony infarct

71
Q
A

ocd of the shoulders, elbow and stifle

72
Q
A

Sequestrum

73
Q
A

synovial osteochondromatosis

74
Q
A

Stenosing tenosynovitis of the abductus pollicus longus m.

75
Q

Greyhound

A

Enesthopathy of the short radial collateral ligament

76
Q
A

Long digitial extensor tendon injury

  1. sclerosis of the lateral epicondyle of the femor.
  2. Avlusion

Giant breed dogs. Trauma

77
Q
A

Ameloblastoma

78
Q
A

Ossifying fibroma in young horse

79
Q

Masses in a horses nose… think what?

A

Cyst, hematoma, neoplasia (SCC, Sarcoid, melanoma), fungal (aspergillus).

80
Q

What breed of horse gets cerebellar atrophy?

81
Q
A

Dentigerous cyst (ear tooth)

82
Q
A

TMJ sepsis

Commonly associated with a fistulous tract. Cause is unknown.

83
Q
A

Temporohyoid osteoarthropathy

Look for fractures.

84
Q
A

Cholesterinic granuloma

85
Q
A

Enthesopathy of the nuchal ligament

Jumpers and dressage horses.

86
Q
A

Fracture of the central tarsal bone.

Note the sclerosis

87
Q
A

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
Q
A

Fracture of the sustentacular tali of the calcaneus

89
Q
A

DDF lesion with concurrent navicular bursa effusion

90
Q
A

Distal interphalangeal desmitis/tendinopathy

Note the osseous reabsorption

91
Q
A

cyst-like lesion secondary to trauma

Certifying exam (3 decks)

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