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Schwannoma : Antoni B Areas

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Antoni B areas are hypocellular and less compact than Antoni A areas. They consist of haphazardly arranged spindle cells in a loose myxoid stroma or hyalinized stroma (as seen here) containing a few inflammatory cells and delicate collagen fibers. Antoni B areas also contain variably-sized, ectatic deformed vessels which frequently have hyalinized walls and contain thrombi.

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