Fig. 1From: Case report: mismatch repair proficiency and microsatellite stability in gastric cancer may not predict programmed death-1 blockade resistanceHistopathology of the gastric cancer and its HER2 immunohistochemistry. Microscopic observation revealed a well-differentiated adenocarcinoma with frequent luminal formation and evident nuclear atypia infiltration within a mild desmoplastic stroma; H & E stain (a). In the metastasized lymph node, the tumor cells were strongly positive for the HER2/neu immunostain (brown color) (b); original magnification ×100Back to article page