Slow-growing labyrinthine masses: contribution of MRI to diagnosis, follow-up and treatment.
We report the use of MRI in the diagnosis, follow-up and therapeutic management of three cases of intralabyrinthine Schwannoma. The diagnosis was based on the history and initial and follow-up MRI findings. The main feature suggesting the diagnosis was a nodular intralabyrinthine mass of low signal intensity on T2-weighted images, and high or isointense signal on T1-weighted images (relative to cerebrospinal fluid), which showed contrast enhancement. Follow-up imaging showed growth of the tumour in one patient. One patient underwent surgery for severe tinnitus. To detect these lesions, MRI should be focussed on the inner ear, using thin-section T2-weighted and T1-weighted images before and after contrast medium. MRI allowed informed surgical planning.
Deux
J F
JF
Service de Radiologie, Hôpital Saint-Antoine, Paris, France.
Marsot-Dupuch
K
K
Ouayoun
M
M
Tran Ba Huy
P
P
Sterkers
J M
JM
Meyer
B
B
Tubiana
J M
JM
D000328:Adult; D000368:Aged; D004428:Ear Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007759:Labyrinth Diseases / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis*