Pseudodefect of capitellum

Pseudodefect of capitellum refers to an abrupt contour change of the posterolateral margin of capitellum on coronal sections and is a potential MRI imaging pitfall giving rise to misinterpretations,

It occurs because the width of the articular surface of the capitellum is non-uniform and gradually tapers posteroinferiorly.

Differential diagnosis

  • osteochondral defect
    • occurs most commonly on the anterolateral aspect, not on the posterolateral aspect like pseudodefect
    • can have other pathological features like marrow edema or fluid filled cysts

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Article Information

rID: 31520
Section: Gamuts
Tag: pm
Synonyms or Alternate Spellings:

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