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Extent of artery infiltration by pancreatic cancer cells. A, The typical micromorphology of visceral arteries. B, Cancer infiltrating the arterial adventitia. C, Cancer infiltrating the arterial media and clung to membrana elastica interna. D, Cancer infiltrating the arterial intima. blue arrow, * Nerve/ perineural invasion; red arrow, cancer cells; yellow arrow, membrana elastica external; green arrow, membrana elastica interna; orange arrow, arterial intima.
