Villin

Formalin-fixed, paraffin embedded tissue block or cell block, or 1 unstained charged slide for each test requested plus 3-4 additional unstained slides cut at 4 microns. Adequate space on each slide for control tissue is required.

Relatively specific marker for gastrointestinal carcinomas (brush border staining). Staining may also be present in a subset of other tumor types (e.g. Merkel cell carcinoma, carcinomas arising from the pancreas, lung, ovary and kidney).