18.Two large infarctions (areas of coagulative necrosis) are seen in this sectioned spleen. Since the etiology of coagulative necrosis is usually vascular with loss of blood supply, the infarct occurs in a  vascular distribution. Thus, infarcts are often wedge-shaped with a base on the organ capsule.

18.图示部分脾的2个大梗死灶。病因为血液供应减少，因此梗死发生于血管分布区。梗死通常呈基底靠近被膜的楔形灶。