Takayasu arteritis with medio-medial intussusception?

We present an autopsy case of a child with Takayasu arteritis who succumbed due to cerebrovascular accident with an interesting finding in the inflamed aorta. On account of necro-inflammatory changes in the media of the distal descending thoracic aorta coupled with the shear stress of accelerated hypertension, there was a medial detachment, which migrated and lay between the intima and media of the abdominal aorta. This displacement was visualized on gross and histopathological examination as a 'laminated' appearance of coils of discontinuous inflamed tunica media, reminiscent of a hydatid cyst, which has been designated as medio-medial intussusceptions.