Spleen - Extramedullary Hematopoiesis - Gallery

Spleen, Red pulp - Extramedullary hematopoiesis, Increased in a treated male B6C3F1/N mouse from a chronic study. The red pulp is markedly expanded by numerous hematopoietic cells (arrow).

Spleen, Red pulp - Extramedullary hematopoiesis, Increased in a treated male B6C3F1/N mouse from a chronic study (higher magnification of Figure 1). Extramedullary hematopoiesis in this case includes increased numbers of erythroid (arrow) and myeloid (arrowhead) precursor cells.