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Old 10-29-2010
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Temporal arteritis also known as Giant cell arteritis is chronic granulamatous inflamation of mostly large arteries such as temporal artery in head , vertebral/opthalmic artery and aorta , on microscopic appearance there is nodular intimal thickening of involved arterial segments and granulamtous inflammation within the media

In takayasu falls in the same category except it involves persons younger than age 50 while its reverse in case of temporal arteritis
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