A Case of Untreated Myeloid Sarcoma of the Pancreas Head Region: Diagnostic Process of AML Subtyping in an Autoptic Case

Figure 3

(a) Cut section of the pancreatic head showing an ill-circumscribed whitish mass (arrowheads) and multiple swollen peripancreatic lymph nodes. Microscopic image showing a (b) rather circumscribed tumor border (dotted line) and (c) discohesive and round tumor cells, often with marked cleaved nuclei. Tumor cells with remaining scattered pancreatic acinar cells (arrowheads) are seen (d). Immunohistochemistry showing some tumor cells are positive for (e) CD163 and most tumor cells are positive for (f) myeloperoxidase and (g) CD33 (immunohistochemistry for (e) CD163, (f) myeloperoxidase, and (g) CD33).

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