Ki-67 labeling was focally increased. The tumor was diffusely strongly positive for STAT6 (signal transducer and activator of transcription 6), focally positive for desmin, and negative for cytokeratin AE1/3, CD34, ERG (ETS-related gene), beta-catenin, S100, and smooth muscle actin (SMA). This evidence concerns the gene ERG and neoplasm.