Tram-track sign (orbit)

Last revised by Francis Deng on 1 Sep 2020

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Deng F, Bilodeau L, et al. Tram-track sign (orbit). Reference article, Radiopaedia.org (Accessed on 24 Apr 2024) https://doi.org/10.53347/rID-6667

DOI:

https://doi.org/10.53347/rID-6667

Permalink:

https://radiopaedia.org/articles/6667

rID:

6667

Article created:

4 Aug 2009, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had no recorded disclosures.

View Frank Gaillard's current disclosures

Last revised:

1 Sep 2020, Francis Deng ◉

Disclosures:

At the time the article was last revised Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Revisions:

8 times, by 7 contributors - see full revision history and disclosures

Systems:

Central Nervous System, Oncology

Sections:

Signs

Tags:

oncology, eye, orbit

Synonyms:

Tram track sign (orbit)

Tram-track sign refers to the parallel thickening and enhancement around the optic nerve, and is most frequently seen in the setting of optic nerve meningioma. It may, however, also be seen in ¹:

It is helpful in distinguishing dural diseases from optic nerve glioma. However, it should be noted that in some cases the nerve sheath can be diffusely thickened and therefore mimicking the appearance of a optic nerve meningioma ².

It should not be confused with other tram-track signs elsewhere in the body.