D-21. Juvenile Bilateral Carotid Artery Thrombosis

ing of the lumen was prominent at the distal portion of the int. carotid art. and the proximal portion of the mid. cereb. art., and moderate in the ant. cereb. art., the post. comm. art., and the branching portion of the post. comm. art. and the int. carotid art. No narrowing was found in the basilar art. 2) The tissue destruction, such as the disappearance of the lamina elastica interna and/or the lamina muscularis, was observed only at the proximal portion of the mid. cereb. art. 3) The round cell infiltration to the adventitia of the vessels was seen at the distal portion of the int. carotid art. and at the proximal portion of the mid. cereb. art. 4) Elastosis was noticed in the lamina interna. 5) The vessels of the thalamus were rich in number and their internal diameter was large and their walls were thin. 6) The vessels of the leptomeninges of the vertex were abundant and their nature was same as 5). 7) On the base of the brain, many tortuous small vessels were seen. Their internal diameter was large, their walls thin, and most of the lamina elastica interna was existing in almost all of the tortuous small vessels, but in some it was obscure. The lamina muscularis was thin and in some cases very obscure.