Non-Cancerous Prostate Biopsy Results: PIN What percent of atypia results in cancer on followup biopsy? PIN: Prostatic Intraepithelial Neoplasm----Most likely no big deal. Think of the actual individual prostate gland cell...the nucleus isn't right. For a cell to be "cancerous" it has to invade tissue. In PIN there is no invasion, just a funny looking nucleus. …
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