PIN4 triple stain

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.

PIN4 consists of a cocktail of three antibodies, including AMACR(P504S), p63, and high molecular weight cytokeratin. It is a triple stain that is useful in distinguishing prostatic adenocarcinoma (variable AMACR/P504S red cytoplasmic staining with a lack of basal cell p63+HMWK brown staining) from the benign mimickers (with preserved basal cell brown staining of p63+HMWK and generally lack of red cytoplasmic staining of AMACR/P504S).