Thumb sign (chordoma)
Citation, DOI, disclosures and article data
Citation:
Gaillard F, Tatco V, Goel A, et al. Thumb sign (chordoma). Reference article, Radiopaedia.org (Accessed on 28 Mar 2025) https://doi.org/10.53347/rID-4613
rID:
4613
Article created:
Disclosures:
At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Frank Gaillard had the following disclosures:
- Radiopaedia Australia Pty Ltd and Radiopaedia Events Pty Ltd, Director, Founder and CEO (Radiopaedia) (ongoing)
- Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)
These were assessed during peer review and were determined to not be relevant to the changes that were made.
View Frank Gaillard's current disclosures
Revisions:
5 times, by
5 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Thumb sign of chordoma
- Thumbing of the pons (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 as a projection of the tumour indenting the pons 1,2.
See also
References
- 1. Erdem E, Angtuaco EC, Van Hemert R et-al. Comprehensive review of intracranial chordoma. Radiographics. 2003;23 (4): 995-1009. doi:10.1148/rg.234025176 - Pubmed citation
- 2. Azzopardi C, Grech R, Mizzi A. Teaching NeuroImages: chordoma. Neurology. 2014;83 (10): e110-1. doi:10.1212/WNL.0000000000000751 - Pubmed citation
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