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 :
- orbital pseudotumor
- perioptic neuritis
- orbital sarcoidosis
- orbital leukemia
- orbital lymphoma
- orbital metastases
- perioptic hemorrhage
- Erdheim-Chester disease
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 .
It should not be confused with other tram-track signs elsewhere in the body.
Siehe auch:
- inflammatorischer Pseudotumor der Orbita
- Erdheim-Chester-Erkrankung
- Meningeom Nervus opticus
- Opticusgliom
- Tram-Linien-Zeichen
und weiter:
Assoziationen und Differentialdiagnosen zu tram-track sign:
