MRI Scan and Intra-labyrinthine Schwannoma

INTEREST OF INTRAVENOUS INJECTION OF GADOLINIUM IN EXPLORATION INTRA-LABYRINTHINE SCHWANNOMA IN MRI 3 TESLAS

Evaluate the interest of gadolinium for the positive and topographic diagnosis of intra-labyrinthine schwannoma, comparing T1 sequence acquired after gadolinium injection to a sequence of fast imaging type employing steady state acquisition (FIESTA-C)

Inclusion Criteria:

• Age 18-80 years
• Have intra-labyrinthine schwannoma
• Have benefited from an MRI with gadolinium injection on the MRI 3T with interpretable sequences of good quality
• Subject giving their consent for their participation
• Subjects who benefited, between 2009 and 2016, from an MRI of the external auditory canals, with gadolinous product injection and on the 3 Tesla MRI, in which a diagnosis of intra labyrinthine schwannoma was made

Exclusion Criteria:

- Refusal to participate in the study