Myeloid Sarcoma after Allogenic Stem Cell Transplantation for Acute Myeloid Leukemia: Successful Consolidation Treatment Approaches in Two Patients

Figure 4

Stained biopsy from patient 2. (a) Subepithelial diffuse infiltrate of blasts in the biopsy specimen from the epipharyngeal lesion (hematoxylin/eosin staining). Black arrow: respiratory epithelium. (b) Virtually all the blasts are myeloperoxidase positive by immunohistochemistry. (c) The tumor cells are negative for CD56. Size bars: 80 µm.