Microscopic findings in neonatal homozygous FvQ/Q mice.

(A) Atrial thrombosis involving predominantly the left atrium with small right atrial thrombus attached to atrial septum (bar = 300μ). (B) Brain microthrombi (arrowheads), thalamic region (bar = 150μ). (C) Hepatic thrombus (arrows) with associated area of infarction (asterisk) (bar = 150μ). (D) Large thrombus (arrows) in mesentery adjacent to pancreas (bar = 300μ). All sections are stained with hematoxylin and eosin (H&E) (sections are from mice on a mixed 129Sv–C57BL/6J).