EURORAD ESR

Case 15159

Trochlear Calcification - Mimicker of Intra-orbital Foreign Body

Author(s)
Poh Sen Tay1
Phyllis Wan Chun Ho2

1Sarawak General Hospital, Malaysia
2Bintulu Hospital, Malaysia
 
Patient
male, 54 year(s)
 
 
  • Figure 1
    Coronal CT Orbit- bone window

    Bilateral trochlear calcification (yellow arrows). Note the inverted "U" shaped morphology on the left and comma-shaped morphology on the right.

     
    Area of Interest: Eyes; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Foreign bodies;
     
     
  • Figure 2
    Axial CT Orbit- bone window

    Bilateral trochlear calcification (yellow arrows).

     
    Area of Interest: Eyes; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Foreign bodies;
     
     
  • Figure 3
    Superior Oblique Anatomy

    Figure demonstrating the relationship between the superior oblique muscle and trochlear.

     
    Area of Interest: Eyes; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Foreign bodies;
     
     
  • Figure 4
    Axial CT Orbit- soft tissue window

    Image demonstrating the relationship between the left superior oblique muscle (red and green arrows) and the calcified trochlear (yellow arrow). Note that the muscle make a posterior course after passing through the...

     
    Area of Interest: Eyes; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Foreign bodies;
     
     
  • Figure 5
    Coronal CT Orbits- bone window

    Left lateral orbital wall fracture (red arrow).

     
    Area of Interest: Eyes; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Foreign bodies;
     
     
Bilateral trochlear calcification (yellow arrows). Note the inverted "U" shaped morphology on the left and comma-shaped morphology on the right.
 
Bilateral trochlear calcification (yellow arrows).
 
Figure demonstrating the relationship between the superior oblique muscle and trochlear.
 
Image demonstrating the relationship between the left superior oblique muscle (red and green arrows) and the calcified trochlear (yellow arrow). Note that the muscle make a posterior course after passing through the trochlear.
 
Left lateral orbital wall fracture (red arrow).
 
 
 
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