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INTERNAL AUDITORY MEATUS LIPOMA
Mohammad Habib Khan
K O’Driscoll
ENT Department
Regional Hospital, Tullamore
INTRODUCTION: IAM lipomas are quite rare with no gender predilection. They
usually involve 7th & 8th cranial nerves, making difficult the differential diagnosis with
other lesions. Histopathologically, it is composed of mature fat cells that are interspread
between nervous cells and fibrovascular tissue. Diverse theories exists, accepted one is,
that it is a congenital malformation resulting from anomalous persistence of
mesenchymal cells associated with arachnoid matter. MRI is the investigation of choice.
Recommend course is conservative attitude with regular imaging.
CASE HX: A 47 years male presented with left tinnitus and hypoacusis. Underwent
T1 weighted MRI with contrast. The hyperintense signals were suggestive of Lipoma.
CLINICAL SIGNIFICANCE:
Clinicians and pathologists should be aware of this
rare but unique clinopathological entity for proper patient management
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