[Takayasu-Onishi arteritis. II. Relations of Takayasu-Onishi arteritis with other non-specific arteritides].

Takayasu-Onishi arteritis (T.O.) is similar to Hutchison-Horton arteritis (H.H.) on histological, clinical, laboratory, and pathogenetic grounds. Both probably depend on immunitary dysreactivity, their different clinical expression being attributable to differences in the district involved and the age of the subject. Both are preceded or accompanied by rheumatism. An interesting relation can be made out between temporal arteritis and "rheumatic polymyalgia" or, more aptly, "rhizomelic polymyalgia" (Ballabio, 1975). The latter (of rheumatic origin) may accompany arteritis - Hamrin, indeed, has suggested their unification in the description "arteritic polymyalgia". It is uncertain whether vasculopathy in the course of collagen disease, rheumatic arteritis, and polyarteritis nodosa can be identified with T.O., even though a common immunological basis can be made out. The difference between T.O. and thromboangiitis obliterans, on the other hand, is quite clear at the present time.