Expand ("E")   Collapse

Age: 42

Sex: Male

Indication: Trauma

Trochlear Calcification

Mimicking a Foreign Body

Findings Relating to the Mimic

  • Mild right preseptal soft tissue stranding
  • Curvilinear calcification in the upper inner post-septal soft tissues bilaterally corresponds to the trochlea, a normal physiologic/developmental variant.


  • The superior oblique muscle passes through the trochlea, which is a pulley-like structure that is adjacent to the medial wall of the orbit.
  • Calcification of the trochlea is a common incidental variant and can be unilateral or bilateral.


7 = Trochlea. 6 = Superior oblique muscle. Illustration by Edelhart Kempeneers/ Public domain via Wikimedia (https://commons.wikimedia.org/wiki/File:Eyemuscles.png) Left trochlear calcification (red arrow)

📣 Feedback?

⌨️  Keyboard Shortcuts ("K")

⌨️ Keyboard Shortcuts

View shortcuts


  Full screen




  Save the case

  Close case/tab

Previous Slice (Scroll)

Next Slice (Scroll)

 Toggle presets

 Previous series (if multiple)

 Next series (if multiple)

  Previous case (⌘ ◄ on a mac)

  Next case (⌘ ► on a mac)