The tumor cells were negative for CD25, myeloperoxidase (MPO), CD34, CD123, CD138, and CD163 but strongly positive for CD117, CD13, and CD33 (Fig. 3A and C) and focally positive for mast cell tryptase, CD30, CD43, and CD68 (Fig. 3B and D). Here, ANPEP is linked to neoplasm.