CD99 and neoplasm: The tumor cells were negative for AE1/3, Cam5.2, CKIT, DOG1, CD99, SOX10, S100, HMB45, MelanA, Syn, CgA, Trypsin, Desmin, SMA, Caldesmon, collagen type 4, Laminin, Inhibin, Calretinin, STAT6, CD34, ERG, WT1, ER, PR, and SALL4.