Which marker is used to identify prostatic epithelium in the PIN 4 Cocktail?

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Multiple Choice

Which marker is used to identify prostatic epithelium in the PIN 4 Cocktail?

Explanation:
The key idea is that the PIN4 cocktail uses a dual approach: a basal cell marker to outline the intact basal layer and a marker that highlights neoplastic prostatic epithelium. P504s, which detects AMACR, is the marker that stains neoplastic prostatic epithelium, helping to identify PIN and carcinoma when used with the basal markers. The other markers serve different roles: p63 and CK5/6 label basal cells, while CK8/18 marks luminal epithelium, but they do not specifically identify neoplastic prostatic epithelium in this cocktail. Thus, P504s (AMACR) is the marker used to identify prostatic epithelium in the PIN4 cocktail.

The key idea is that the PIN4 cocktail uses a dual approach: a basal cell marker to outline the intact basal layer and a marker that highlights neoplastic prostatic epithelium. P504s, which detects AMACR, is the marker that stains neoplastic prostatic epithelium, helping to identify PIN and carcinoma when used with the basal markers. The other markers serve different roles: p63 and CK5/6 label basal cells, while CK8/18 marks luminal epithelium, but they do not specifically identify neoplastic prostatic epithelium in this cocktail. Thus, P504s (AMACR) is the marker used to identify prostatic epithelium in the PIN4 cocktail.

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