Double disc sign

Thickening of the insertion of the lateral pterygoid muscle can mimic an anterior displaced temporomandibular disc. When both thickening of the inferior belly insertion and an anteriorly displaced disc are present, as in temporomandibular joint dysfunction, the two structures parallel each other; the so-called "double disc" sign.

Article information

rID: 5451
Section: Signs
Tag: tmj
Synonyms or Alternate Spellings:
  • Double disc sign (TMJ)

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Cases and figures

  • Figure 1: double disc sign
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