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Fig 2. Photomicrograph of a rabbit aneurysm 10 weeks after embolization with platinum coils shows sparse cells within the dome that are positive for SMA staining (arrow); no positive cells were observed at the neck (dashed arrow). The cells at the side edge of neck (the transition zone of aneurysm wall to aneurysm neck) are positive for SMA (dotted arrow) (immunohistochemistry, antibody to SMA, original magnification x60).
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