Preferred Label : tram track sign of optic nerve;
RADLEX synonyms : optic nerve tram track sign; tram-track sign of optic nerve;
Definition : Optic nerve sheath appears as low intensity line (optic nerve) flanked by high intensity
signal (sheath). Typically indicates optic nerve sheath meningioma, in which sheath
becomes enhanced but nerve itself does not. May also indicate other orbital disease.;
Source : Radiology 2003; 227:718-719;
Origin ID : RID35410;
Associated condition(s)
- Automatic exact mappings (from CISMeF team)
Optic nerve sheath appears as low intensity line (optic nerve) flanked by high intensity
signal (sheath). Typically indicates optic nerve sheath meningioma, in which sheath
becomes enhanced but nerve itself does not. May also indicate other orbital disease.
