Spinal neurilemmomas and neurofibromas: central dot sign in postgadolinium MRI.
The MR studies of three histologically proven spinal neurilemmomas and neurofibromas were reviewed retrospectively. There were two benign neurilemmomas (schwannomas) and one neurofibroma. The common characteristic of these cases was a central low intensity focus ("dot") seen on postcontrast T1-weighted imaging. The low intensity foci corresponded histologically to a congeries of changes including edema, microcysts, foam cells, hyalinization of blood vessels, old hemorrhage, and dystrophic calcification.
Department of Radiology, University of Athens, Medical School, Areteion Hospital, Greece.
A D
AD
Gouliamos
D S
DS
Kontogiannis
J
J
Androulidakis
A E
AE
Kalovidouris
L J
LJ
Vlahos
C G
CG
Papavasiliou
D000328:Adult; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis*; D009455:Neurofibroma / Q000175:diagnosis*; D009942:Organometallic Compounds; D004369:Pentetic Acid; D012189:Retrospective Studies; D013120:Spinal Cord Neoplasms / Q000175:diagnosis*
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA