Fig. 4From: 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. A The tumor cells showed complete loss of INI-1 (SMARCB1 protein). B-D The tumor cells were diffusely positive for BRG1 (SMARCA4), BRM (SMARCA2) and ARID1A. E and F The tumor proportion score (TPS) of PD-L1 (22C3) expression was 95%, and the combined positive score (CPS) was over 100Back to article page