NCIt synonyms : Low-Grade Intraepithelial Neoplasia of the Prostate; Grade I PIN; Grade 1 PIN; PIN-1; Grade 1 Prostatic Intraepithelial Neoplasia; Low-Grade PIN; Grade I Prostatic Intraepithelial Neoplasia; Low-Grade Intraepithelial Neoplasia of Prostate; Low-Grade Prostatic Intraepithelial Neoplasia;
NCIt definition : Prostatic intraepithelial neoplasia characterized by the proliferation of secretory
cells with irregular spacing in the ducts and acini. Although some proliferating epithelial
cells may contain prominent nucleoli, the cytologic atypia and architectural growth
patterns that are seen in the high grade prostatic intraepithelial neoplasia are absent.
The presence of low grade prostatic intraepithelial neoplasia in needle biopsy is
not a risk factor for the subsequent detection of carcinoma on repeat biopsy.;