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Identifies Mucin 5AC, a high molecular weight glycoprotein normally expressed in the surface gastric foveolar epithelium and some respiratory tract epithelia. It is a useful marker for differentiating gastrointestinal and pancreatobiliary tumors, as well as identifying mucinous adenocarcinomas of various origins.
Tissue Block: Formalin-fixed, paraffin-embedded (FFPE) tumor block preferred.
Unstained Slides: Recommended 2 charged slides per stain requested (minimum of 1 slide per stain), baked or unbaked.
Fixation: Tissue must be fixed in 10% neutral buffered formalin for 6–72 hours.
Use cold pack for transport. Make sure cold pack is not indirect contact with specimen.