Equine Stifle and Tarsus Flashcards by D. M.

Q

What are the 3 routine radiographs for the stifle?

A

Lateromedial
Caudocranial
Caudo45lateral-craniomedial oblique

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Q

What view?

A

Caudo45lateral-craniomedial oblique

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Q

Identify the indicated structures

A

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Q

What view?

A

Cranioproximal-craniodistal oblique
“Skyline patella”

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Q

What view?

A

Flexed lateral oblique

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Q

Identify the indicated structures

A

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Q

Identify the indicated signs of the given disease process

A

Osteoarthritis

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Q

A

Osteoarthritis
Yellow = osteophytes
Fibula is laterral

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Q

A

Stifle osteochondrosis

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Q

A

Stifle osteochondrosis

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Q

A

Stifle osteochondrosis
Flattening of the medial femoral condyle - but a very subtle ‘double line’ indicating a concave defect

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Q

A

Osseous cyst-like lesion of the medial femoral condyle
Common

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Q

What are the 2 manifestations of osteochondrosis in the stifle joint?

A

Osteochondrosis of the femoral trochlear ridge
Osseous cyst-like lesions of the medial femoral condyle

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Q

A

Osseous cyst-like lesion of the lateral femoral condyle
Uncommon

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Q

A

Patellar fragmentation
Bordered by sclerosis

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Q

A

Patellar fragmentation + lateral trochlear OC lesion

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Q

If you had to chose 1 view to screen for the most common OC lesions of the stifle, what would it be?

A

Caudolateral-craniomedial oblique

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Q

A

Normal foal stifle
Irregular trochlear ridges, tibial apophysis and patella can also be irregular

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Q

A

Septic foal stifle

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Q

A

Tibial stress fracture

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Q

A

Tibial stress fracture

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Q

A

Tibial eminence fracture
Likely traumatic

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Q

A

Tibial eminence fracture
Likely traumatic

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Q

A

Tibial tuberosity fracture

Chronic changes from prior trauma and meniscal injury *Rounded margins and osteoproliferation*

What are the routine projections for the tarsus?

Lateral DP DMPLO DLPMO

What surfaces are we highlighting with a DLPMO projection?

What surfaces are we highlighting with a DMPLO projection?

What view?

Flexed skyline

Osteoarthrosis *Earliest sign = osteophyte formation (green)*

Degenerative change *Medullary and subchondral bone sclerosis*

Degenerative change *Subchondral bone lysis/erosive changes/resorption*

Degenerative change *Periarticular osteophytes*

Advanced osteoarthrosis of the tarsus *Eventually = ankylosis*

Advanced osteoarthrosis of the tarsus *Eventually = ankylosis*

Advanced osteoarthrosis of the tarsus

Advanced osteoarthrosis of the tarsus

Advanced osteoarthrosis of the tarsus

Abnormal origin of the suspensory ligament

Septic arthritis with marked intracapsular swelling (yellow)

Incomplete ossification of the cuboidal bones

What are the common sites of osteochondrosis of the tarsus?

Distal intermediate ridge of the tibia Lateral trochlear ridge of the talus Medial malleolus >> lateral malleolus Medial trochlear ridge of the talus

OCD of the distal intermediate ridge of the tibia

OCD of the distal intermediate ridge of the tibia

OCD of the distal intermediate ridge of the tibia (most common site)

OCD of the lateral trochlear ridge distal tip (second most common site)

If you had to choose 1 view to screen for the most common OC lesion/s of the tarsus, what would it be?

DMPLO

OCD of the medial malleolus

OCD of the medial malleolus

What projection is needed to detect OCD of the medial malleolus?

Dorso10lateral-plantaromedial oblique

Normal medial malleolus

Abnormal medial malleolus

Slab fracture of the tarsus

Infection/osteomyelitis

Which trochlear ridge is larger?

Medial *Medial is massive*

What projection do you see Larry's nose? What is it?

Lateral trochlea of talus (tarsus) DMPLO

What is the earliest sign of osteoarthrosis?

Osteophyte formation

Define: Bone Spavin

Osteoarthrosis of the distal intertarsal and tarsometatarsal joints

What is highlighted with the flexed tarsus skyline?

Sustentaculum tali *DDFT runs over*