The tumor cells were negative for synaptophysin, SMA (smooth muscle actin), TTF-1 (thyroid transcription factor-1), Chromogranin A, desmin, GFAP, WT-1 (Wilm’s tumor gene-1), HBME-1 (Hector Battifora mesothelial epitope-1). Here, TTF1 is linked to neoplasm.