The tumor cells were negative expression of CD34, chromogranin A (CgA), CD56, CK5/6, nuclear protein in testis (NUT), CDX2, CD117, CD20, CD5, CD3, CD79a, CD30, S100, LCA, HMB45, MUM1, CD43, MPO, TDT and p63. Here, MPO is linked to neoplasm.