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| Medical
Imaging
← MRI
of the Knee
← |
| Presentation
|
|
| MR
imaging
of trochlear
dysplazia
–
Femoral troachlear
dysplazia = abnormality of the shape and depth of the trochlear groove
mainly in the cranial part
– Leads to
pattelar instability and anterior knee pain
–
Diagnosis
Lateral X-Ray:
–
crossing sign=floor of the groove crosses the anterior line of the
lateral femoral condyle
–
the ventral prominence > 3 mm=distance between a line anterior
to
the femoral shaft and a parallel tangent to the most anterior point of
the trochlear floor.
X-Ray
trochlear dysplazia
| 
|
Normal
knee | 
Dysplazia
(Click
to
enlarge!)
Pfirrmann
et al. Radiology 2000;216:858
|
MR
imaging of trochlear dysplazia
Diagnosis
axial MR:
At 3 cm
above joint space
Trochlear depth =([a + b]/2) - c
Cut-off
3 mm
Pfirrmann
et al. Radiology 2000;216:858 | 
|
Anterior knee pain
syndrome
| Frequent
causes | Uncommon
causes | Pattelar
instability | Referred
pain
from the hip | Pattelar
tendinopathy | Osteochondritis
dissecans | Synovial
plica | Tumors | Patellar
bursitis | Perthes’
disease | Quadriceps
tendinopathy | | Fracture | | Bipartite
patella | | Osgood-Schlatter
disease | | Sinding-Larsen-Johansson
syndrome | | Postoperative
impingement | | Fat
pad impingement | | Hyperactivity | |
| 
ChondromalciaInflammation Hoffa
Click to enlarge! |
| 
Ostheonecrosis
Synovitis
Click to
enlarge! |
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site is primarily intended for use by qualified medical or
sport
professionals.
If
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The
information provided here is for educational and informational
purposes only and should not be considered as a medical advice.
As
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we can not warrant that the information in this article and web site is
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This
article reflects the opinions and judgments of it's author and may be
further updated.
If
you have questions regarding this article, please contact the author.
Information
belongs to Phoenix
Diagnostic Clinic, Bucharest
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