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Discontinuous unilateral involvement of 12 part core biopsies by adenocarcinoma predicts bilateral involvement of subsequent radical prostatectomy
Author(s) -
Lowenthal Brett Matthew,
Liao Xiaoyan,
Wen Fang,
Bagherzadeh Nader,
Mahooti Sepi
Publication year - 2016
Publication title -
pathology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
eISSN - 1440-1827
pISSN - 1320-5463
DOI - 10.1111/pin.12437
Subject(s) - prostatectomy , medicine , prostatic adenocarcinoma , adenocarcinoma , prostate , urology , stroma , biopsy , prostate cancer , prostate adenocarcinoma , pathology , cancer , immunohistochemistry
At our institution, percent tumor burden in prostate core biopsies is quantified using variations of one of two methods. Measurement by the Aggregate method reports only adenocarcinoma and omits intervening stroma and benign prostatic glands while the Discontinuous method includes the intervening stroma and benign glands between distinct foci of adenocarcinoma. In this study, we selected cases with 12‐part core biopsies that were followed by a radical prostatectomy within two years. Interestingly, we found that when adenocarcinoma involved prostate 12‐part core biopsies and subsequent resection unilaterally, there is no significant difference in absolute percentage of tumor using either measuring method ( P = 0.4 ). In contrast, when adenocarcinoma involved the biopsies unilaterally and subsequent prostatectomy bilaterally, the two measurement methods had a statistically significant difference in percentage scores ( P = 0.002 ). In the study cohort, other factors including Gleason score ( P = 0.88 ) and total number of adenocarcinoma‐involved cores ( P = 0.27 ) did not introduce any significant correlation with bilateral involvement. In this study, we found that biopsies that discontinuously and unilaterally involve half of a prostate are much more likely to involve both lobes than those that are unilateral and present in nodular aggregates.

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