1. Diffuse Extranodal Histiocytic Sarcoma
Thomas D. Lee, M.D., Ph.D.1, Sophie X. Song, M.D., Ph.D.1, Jonathan Said, M.D.1, and Ronald Paquette, M.D.2
UCLA Medical Center
1Department of Pathology and Laboratory Medicine
2Department of Medicine
Los Angeles, CA, United States

2. Bone Marrow Core H&E 40X
Bone marrow core with erythroid hyperplasia and focal aggregates of neoplastic histiocytes

3. Bone Marrow Core H&E 100X
Neoplastic histiocytes (indicated by arrow)

4. Bone Marrow Core H&E 100X
Scattered hemophagocytic activity (indicated by arrow)

5. Bone Marrow Core CD68 4X

6. Bone Marrow Core CD68 40X

7. Bone Marrow Core CD68 100X

8. Bone Marrow Core CD163 40X

9. Bone Marrow Core Fascin 40X

10. Bone Marrow Core CD31 40X