Fig. 3From: Response to PD-1 inhibitor in SMARCB1‑deficient undifferentiated rectal carcinoma with low TMB, proficient MMR and BRAF V600E mutation: a case report and literature reviewImmunohistochemistry results of tumor cells. The tumor cells were positive for cytokeratin AE1/AE3 (A) and vimentin (B). The tumor cells showed weak positivity for SATB2 (C). CDX-2 (D) and CEA (E) were negative. Ki-67(F) was as high as 95%Back to article page