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Distribution of intraductal carcinoma of the prostate and associated lesions in the cancer foci on radical prostatectomy specimens

, : Distribution of intraductal carcinoma of the prostate and associated lesions in the cancer foci on radical prostatectomy specimens. Nihon Hinyokika Gakkai Zasshi. Japanese Journal of Urology 105(4): 163-70; Discussion 171

The distribution of intraductal carcinoma of the prostate (IDC-P) and other intraductal lesions associated with IDC-P was evaluated in the cancer foci on radical prostatectomy specimens. We reviewed slide in 412 cases treated by radical prostatectomy without neoadjuvant therapy. Mapping study was performed with regard to IDC-P, other intraductal lesions associated with IDC-P and invasive carcinoma. We identified 98 cases (23.8%) and 102 cancer foci associated with IDC-P. In these all cancer foci, IDC-P was associated with invasive carcinoma and other intraductal neoplastic lesions with tufting, micropapillary and loose cribriform patterns were contiguous and admixed with IDC-P in 83 cancer foci (81.4%). There were lesions with invasive carcinoma around the IDC-P in 95 cancer foci (93.1%) and lesions without invasive carcinoma around IDC-P in 66 foci (64.7%). The latter lesions existed in the marginal areas of the cancer foci in 63 (61.8%) and in the central areas of the cancer foci in 14 (13.7%). In 5 cancer foci (4.9%), volume of IDC-P was larger than that of invasive carcinoma. The distribution of IDC-P with dense cribriform and solid patterns varied in cancer foci, and intraductal lesions with tufting, micropapillary and loose cribriform patterns were frequently seen in area contiguous and admixed with IDC-P. The latter lesion may be low grade morphology of IDC-P, although the lesions could not be distinguished from high grade prostatic intraepithelial neoplasia.


PMID: 25757345

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