Modality: Diagram

Used in the following article:

  • Thumb sign (chordoma) - “ The thumb sign or thumbing of the pons is described in chordomas as is meant to be relatively specific. It is seen in midline sagittal projection ...”
  • Chordoma - “ Chordomas are uncommon malignant tumours that account for 1% of intracranial tumours and 4% of all primary bone tumours.  They originate from emb...”

View full size version of Chordoma - thumbing the pons sign (illustration)

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