[Horton's disease. Current problems]

Much that has been written in the last few years concerning temporal arteritis has allowed us to better clarify the clinical picture, and for example frequency of hepatic involvement. The atypical forms of the disease such as those that involves large arteries, or those in which sedimentation rate is normal, are better known. It is in such atypical cases, particularly in a young patient, that an external carotid arteriography is most useful. Though the pathophysiology of the disease is not well understood, serologic and histologic arguments exist in favor of an autoimmune etiology, in which the antigen would be the alestin, found in the internal elastic lamina of the artery. Temporal arteritis is theorically well classified amongst the giant cell granulomatous arterities but there are some atypical forms difficult to distinguish from Takayasu's arteritis or even periarteritis nodosa.