Additional immunohistochemistry on the well differentiated region of TOV-112D original tumour. H&E-stained slide and immunohistochemistry for AE1/AE3, EMA, cytokeratin 7 (CK7), PAX8, ARID1A, PTEN, HNF1 beta, and Napsin A. Larger images at 100x. Image insets at 20x magnification. The round holes in the tissue in the inset images are from tissue punches for TMA construction.