<prompt> White infract is not seen in which of the followingLiverKidneySpleenHea  <response>: Ref Robbins 8e p128; 7e p138 see explanations of earlier question White infarcts occur with aerial occlusions in solid organs with end-aerial circulations e.g., hea, spleen, and kidney, and where tissue density limits the seepage of blood from adjoining patent vascular beds Fig. 3-17, B. Infarcts tend to be wedge-shaped, with the occluded vessel at the apex and the organ periphery forming the base Fig. 3-17; when the base is a serosal surface, there is often an overlying fibrinous exudate. Lateral margins may be irregular, reflecting flow from adjacent vessels. The margins of acute infarcts typically are indistinct and slightly hemorrhagic; with time, the edges become better defined by a narrow rim of hyperemia attributable to inflammation. Infarcts resulting from aerial occlusions in organs without a dual circulation typically become progressively paler and sharply defined with time Fig. 3-17, B. By comparison, hemorrhagic infarcts are the rule in the lung and other spongy organs Fig. 3-17, A. Extravasated red cells in hemorrhagic infarcts are phagocytosed by macrophages, and the heme iron is conveed to intracellular hemosiderin. 