Tumor cells show strong diffuse cytoplasmic staining for CK and are negative staining for CD20 & synaptophysin.
Referred block and slide for immunostaining of gastric mass endoscopic biopsy.
One Hx&E stained slide and paraffin block coded N1331-25. Sections immunostained for CK, Synaptophysin and CD20.
Gastric Mass, endoscopic Biopsy and immunostaining:
Poorly cohesive carcinoma (poorly differentiated adenocarcinoma), grade 3.