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Histologic differentiation, cancer volume, and pelvic lymph node metastasis in adenocarcinoma of the prostate.

5 McNeal JE, Villers AA, Redwine EA, Freiha FS, Stamey TA.

Biological determinants of cancer progression in men with prostate cancer.

4 Stamey TA, McNeal JE, Yemoto CM, Sigal BM, Johnstone IM.

Transrectal ultrasound versus digital rectal examination for the staging of carcinoma of the prostate: results of a prospective multi-institutional trial.

3 Smith JA, Scardino PT, Resnick MI, Hernandez AD, Rose SC, Egger MJ.

Value of ultrasound-guided systematic sextant biopsies in prostate tumor mapping.

2 Salomon L, Colombel M, Patard JJ, et al.

Workgroup 2: screening and detection-reference range/clinical issues of PSA. Tumor volume estimation with all three methods was more accurate for higher tumor volumes.ĬONCLUSION: Addition of 3D MR spectroscopic imaging to MR imaging increases overall accuracy of prostate cancer tumor volume measurement, although measurement variability limits consistent quantitative tumor volume estimation, particularly for small tumors. For these nodules, measurements of tumor volume with MR imaging, 3D MR spectroscopic imaging, and a combination of both were all positively correlated with histopathologic volume (Pearson correlation coefficients of 0.49, 0.59, and 0.55, respectively) only measurements with 3D MR spectroscopic imaging and a combination of MR and 3D MR spectroscopic imaging demonstrated statistical significance ( P <. Two readers detected 20 (65%) and 23 (74%) of 31 peripheral zone tumor nodules greater than 0.50 cm 3. RESULTS: Mean volume of peripheral zone tumor nodules ( n = 51) was 0.79 cm 3 (range, 0.02–3.70 cm 3). Analyses were performed for all nodules and nodules greater than 0.50 cm 3.

Bland-Altman regression analysis was used to evaluate systematic bias between tumor volumes measured with MR imaging and true tumor volumes.

P values were calculated with a random effects model. Accuracy of tumor volume measurement was assessed with the Pearson correlation coefficient. Results were analyzed with step-section histopathologic tumor localization and volume measurement as the standard.

Two independent readers recorded peripheral zone tumor nodule location and volume. MATERIALS AND METHODS: Endorectal MR and 3D MR spectroscopic imaging were performed in 37 patients before radical prostatectomy. PURPOSE: To determine accuracy of magnetic resonance (MR) and three-dimensional (3D) MR spectroscopic imaging in prostate cancer tumor volume measurement.