ANEURISM DISSECTING
\ˈanjuːɹəɹˌɪzəm dˈa͡ɪsɛktɪŋ], \ˈanjuːɹəɹˌɪzəm dˈaɪsɛktɪŋ], \ˈa_n_j_uː_ɹ_ə_ɹ_ˌɪ_z_ə_m d_ˈaɪ_s_ɛ_k_t_ɪ_ŋ]\
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is one in which, owing to rupture of the inner and middle coats of an artery, the blood makes itself a channel between these coats and the outer coat. In many cases, the lesion appears to consist in a separation of the laminae of the middle coat, between which the blood forms itself a channel.
By Robley Dunglison
