Radiology Package 20

1
Radiology Package 20

• Stifles

2
6-year old German ShepherdFoxy

• HxBilateral hip dysplasia. Lame in the left hind
  for 6 weeks. Palpable cranial drawer on left
  stifle.

3
6-year old German Shepherd Foxy

• RF
• There is distension of the joint capsule as
  indicated by the decrease in size of the
  infrapatellar fat pad.
• Osteophyte formation is present on the patella
  and the trochlear ridges of the femur.
• RD
• Stifle effusion with mild degenerative joint
  disease
• R/O
• Cranial cruciate ligament injury

4
7-month old Newfoundland

• Hx Presented for evaluation of an OCD lesion in
  the right shoulder. On PE it is noted that there
  is mild joint effusion in both stifles.

5
7-month old Newfoundland

• RF
• The infrapatellar fat pad is displaced cranially
  and decreased in size.
• Increase in size of the joint capsule has caused
  displacement of the fascial plane cranial to the
  gastrocnemius muscle.
• In the lateral view there is an ill-defined area
  of lucency in one of the femoral condyles.
• The lucent area is dome-shaped with the base of
  the dome at the articular surface of the bone.
• In the CC view the area of lucency is visible in
  the lateral femoral condyle. It appears round and
  surrounded by a rim of scletoric bone.
• RD
• Capsular distension
• Osteochondrosis of the lateral femoral condyle

6
12-year old DSHSheba

• RF
• The infrapatellar fat pad is greatly compressed
  by increase in size of the joint capsule.
• In the lateral view multiple small mineral
  opacity structures are present within the joint
  and adjacent to the patella. The largest is
  present in the medial aspect of the joint capsule
  and is thought to represent a mineralized
  meniscus.
• Osteophyte formation is present on the patella
  and the trochlear ridges of the femur.
• Several tiny mineral opacity fragments are
  visible in the soft tissue proximal to the
  patella.
• RD
• Marked capsular distension
• Meniscal mineralization
• R/O
• Cranial cruciate ligament rupture
• Mineralization of the meniscus could be secondary
  to injury or incidental

7
6-month old F Golden RetrieverKaplan

• Hx Presented with lameness of the left hind
  limb. The dog caught its foot 2 months ago and
  injured the leg at that time. The lameness has
  improved with rest but the dog re-injured the leg
  3 days ago while trying to jump into the back of
  a pick-up truck.

Left
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9
6-month old F Golden RetrieverKaplan

• RF
• The infrapatellar fat pad is displaced cranially
  and decreased in size.
• Increase in the size of the joint capsule has
  caused displacement of the fascial plane cranial
  to the gastrocnemius muscle.
• A small osseous fragment is seen in the joint
  spaces on both the lateral and craniocaudal
  views.
• RD
• Stifle joint effusion
• R/O
• Probable avulsion fracture at the insertion of
  the cranial cruciate ligament.

10
Adult Doberman Pinscher

• Hx Presented for a 2.5 week history of lameness
  in the right hind limb. History of hip dysplasia
  and spondylosis.

11
Adult Doberman Pinscher

• RF
• The infrapatellar fat pad is in normal position
  as is the gastrocnemius fascial plane.
• There is no evidence of joint effusion and/or
  synovial thickening.
• The osseous structures of the joint are normal.
• RD
• Radiographically normal stifle

12
10-year old Mixed breed canine

• Hx Presented for a 2-year history of hind-end
  problems and difficulty in rising. The problem
  has gotten significantly worse in the last 6
  months.

13
10-year old Mixed breed canine

• RF
• The infrapatellar fat pad is compressed by
  increase in size of the joint capsule.
• The gastrocnemius fascial plane is displaced
  caudally.
• Osteophyte formation is present on the patella,
  the trochlear ridges of the femur and on the
  lateral fabella.
• Osteophytes are also seen on the margin of the
  extensor fossa of the distal femur.
• The intercondylar eminences of the tibia are
  flattened.
• RD
• Stifle effusion with moderate degenerative joint
  disease
• R/O
• Cranial cruciate ligament injury

14
14-year old mixed breed canine

• Hx History of osteoarthritis in the coxofemoral
  joints and stifles. Last night the patient became
  recumbent and is unable to rise. Proprioceptive
  and motor deficits are present in the right front
  and left hind limbs.

15
14-year old mixed breed canine

• RF
• The infrapatellar fat pad is compressed by
  increase in size of the joint capsule.
• The gastrocnemius fascial plane is displaced
  caudally.
• Osteophyte formation is present on the patella,
  the trochlear ridges of the femur and on the
  lateral fabella.
• The intercondylar eminences of the tibia are
  flattened and irregular.
• Proliferative bone extends proximally onto the
  femoral epicondyles and along the medial and
  lateral surfaces of the proximal tibia.
• RD
• Stifle effusion with severe degenerative joint
  disease
• Next
• Cranial cruciate ligament injury