Analysis of the origin and invasion of prostate cancer from autopsy and radical prostatectomy specimens.

Background: Without a pseudocapsule, prostate cancer is invasive in volume growth and has some regularity in spatial distribution. Our study aims to explore the specific origin location, invasive characteristics, and morphology of prostate cancer. Methods: Ninety-eight clinical specimens with tumor volume equal to or less than one-third of the organ volume and 111 autopsy specimens were retrospectively analyzed. The origin location and invasion of prostate cancer in four horizontal quadrants and 11 vertical slides were demonstrated. In addition, the median maximum anteroposterior, left-right, horizontal, and vertical diameters of lesions were compared, and the spatial morphology of lesions was described. Results: There were 335 lesions in the autopsy and clinical specimens. There was no significant difference in the distribution of lesions confined to the horizontal quarter quadrant (P=0.064). The number of lesions with a single positive slide above the apex 0.5-1.4 cm was 75 (49.7%). No significant difference was found when compared with the maximum vertical and horizontal diameters (P=0.421). However, the maximum left-right and horizontal diameters were longer than the maximum anteroposterior diameter (P=0.046 and P<0.001). The number of lesions with a tumor area that decreased from the center to both sides was 85 (46.2%) and decreased from the center to one side was 81 (44.0%). Conclusions: Approximately 50% of the lesions originated from the apex above 0.5-1.4 cm. The invasive tendency of prostate cancer was consistent in the horizontal and vertical dimensions but less so in the anteroposterior direction. About ninety percent of lesions with tumor area decreased from the center to both sides or one side.

Updated prevalence of latent prostate cancer in Chinese population and comparison of biopsy results: An autopsy-based study.

Prostate cancer detected by autopsy is named latent prostate cancer. As the repertoire of clinical prostate cancer, latent cancer may better reflect the disease burden. Unlike clinical prostate specimens, which are obtained exclusively from biopsy-positive cases, prostate specimens obtained through autopsy provide information on biopsy-negative cases, helping calculate the true sensitivity of prostate biopsy. From 2014 to 2021, we collected autopsy specimens of the prostate from body donors in China and performed transperineal and transrectal biopsies on specimens before step-sectioning and pathological measurements. We found that the crude prevalence of latent prostate cancer in middle-aged and elderly men was 35.1% (81/231), which was higher than previous estimates for Chinese populations. The overall per-patient sensitivities of transperineal and transrectal biopsies were not significantly different (33.3% vs. 32.1%, p = 0.82), but the two approaches differed in preferential sampling area along the proximal-distal axis of the prostate. Transperineal biopsy had a higher sensitivity for detecting clinically significant lesions in the distal third (34.7% vs. 16.3%, p = 0.02) and distal half (30.6% vs. 18.1%, p = 0.04), while transrectal biopsy had a higher sensitivity for lesions in the proximal half (25.0% vs. 13.9%, p = 0.046). Both transperineal and transrectal methods of biopsy missed most small lesions (<0.1 mL) and 35.3% (6/17) of large lesions (>0.5 mL). In conclusion, the prevalence of latent prostate cancer in China has increased over the past 2 decades. Systematic transperineal and transrectal methods of biopsy had comparable sensitivities but had different preferential sampling areas. Both approaches miss one-third of large lesions.

Comparisons of mpMRI, 68Ga-PSMA PET/CT and mpMRI combined with 68Ga-PSMA PET/CT in diagnosing prostate cancer based on tumor detection, localization and staging.

PURPOSE: To evaluate the diagnostic ability of mpMRI, 68Ga-PSMA PET/CT and mpMRI combined with 68Ga-PSMA PET/CT in detecting and localizing lesions, and further clarify the accuracy of these examinations in tumor staging. METHODS: Seventy patients who underwent mpMRI, 68Ga-PSMA PET/CT and radical prostatectomy were enrolled. The abilities to detect index and clinically significant lesions by three examinations were compared. We further evaluated the ability of these examinations to localize lesions to the superior, inferior, anterior, posterior, left and right halves of the prostate and analyzed their accuracy in local and lymph node staging. RESULTS: There were no significant differences among mpMRI, 68Ga-PSMA PET/CT and mpMRI combined with 68Ga-PSMA PET/CT in their ability to detect index (p = 0.48, p = 0.23 and p = 0.07) and clinically significant lesions (p = 0.30, p = 0.29 and p = 0.06) or to localize lesions in six half divisions of the prostate. With postoperative pathology as reference, both mpMRI (p = 0.10) and mpMRI combined with 68Ga-PSMA PET/CT (p = 0.10) can accurately assess the local staging of prostate cancer. However, 68Ga-PSMA PET/CT underestimates the local staging of prostate cancer (p < 0.01). Regarding lymph node staging, the three types of examination showed no significant differences compared to postoperative pathology (p = 0.63, p = 0.51 and p = 0.14). CONCLUSIONS: With postoperative pathology as reference, 68Ga-PSMA PET/CT underestimates the local tumor staging. MpMRI combined with 68Ga-PSMA PET/CT has no obvious advantages in detecting, localizing or staging prostate cancer compared with mpMRI.

Up-to-Date Imaging and Diagnostic Techniques for Prostate Cancer: A Literature Review.

Prostate cancer (PCa) faces great challenges in early diagnosis, which often leads not only to unnecessary, invasive procedures, but to over-diagnosis and treatment as well, thus highlighting the need for modern PCa diagnostic techniques. The review aims to provide an up-to-date summary of chronologically existing diagnostic approaches for PCa, as well as their potential to improve clinically significant PCa (csPCa) diagnosis and to reduce the proliferation and monitoring of PCa. Our review demonstrates the primary outcomes of the most significant studies and makes comparisons across the diagnostic efficacies of different PCa tests. Since prostate biopsy, the current mainstream PCa diagnosis, is an invasive procedure with a high risk of post-biopsy complications, it is vital we dig out specific, sensitive, and accurate diagnostic approaches in PCa and conduct more studies with milestone findings and comparable sample sizes to validate and corroborate the findings.

The characteristics and spatial distributions of prostate cancer in autopsy specimens.

BACKGROUND: The characteristics of prostate cancer on autopsy and early-stage prostate cancer are identical. Using autopsy specimens, we analysed prostate cancer characteristics and clarified the spatial distributions of lesions. METHOD: We obtained prostate specimens from Chinese donors without a prostate cancer diagnosis and analyzed prostate cancer pathological characteristics on autopsy by whole-mount sampling. We determined the distributions of lesions in horizontal and vertical dimensions. The horizontal dimension included four horizontal quadrants (left-anterior, left-posterior, right-anterior, and right-posterior quadrants), the peripheral zone, and the transition zone. RESULT: The overall positive rate of prostate cancer among 113 specimens was 35.4%. There were 73 lesions in 40 prostates with prostate cancer. The positive rates of lesions in the left-anterior, left-posterior, right-anterior, and right-posterior quadrants were 24.7% (18/73), 27.4% (20/73), 26.0% (19/73), and 21.9% (16/73), respectively. The positive rate of prostate cancer was 74% in the areas between the apex above 0.5-0.8 cm and the middle slice. There were 22 (30.1%) and 51 (69.9%) lesions in the superior and inferior half of the prostate. There were no significant differences in the median volume and Gleason grade group between the superior and inferior half (p = .876 and p = .228). CONCLUSION: In the horizontal dimension, the positive rate of prostate cancer was consistent in the four quadrants. Prostate cancer mainly originated from the areas between the apex above 0.5-0.8 cm and the middle slice. Compared with the superior half, the inferior half of the prostate had a higher positive rate but the same lesion characteristics.

Ginsenoside Rh2 Inhibits Angiogenesis in Prostate Cancer by Targeting CNNM1.

To explore the molecular mechanism by which ginsenoside Rh2 (G-Rh2) inhibits prostate cancer by regulating vascular growth. Different concentrations of G-Rh2 with three prostate cancer cell lines (LNCaP, PC3 and DU145) were transplanted in nude mice, and tumor mass volume was measured over time. LNCaP, PC3 and DU145 were co-cultured with vascular endothelial cells to determine the optimal concentration of G-Rh2 by MTT assay. LNCaP, PC3 and DU145 were cultured under the selected concentration (0, 0.01, 0.05, 0.1, 0.5 and 1 mg/mL) of G-Rh2, and the expression levels of CD31, VEGF, PDGF and CNNM1 detected by qRT-PCR and western blot. The expression pattern of CD31 was detected in CNNM1 overexpressed and knockout LNCaP, PC3 and DU145 cells under G-Rh2. G-Rh2 significantly inhibited the growth of all three prostate cancer cell lines in the dorsum of nude mice (P <0.05), and the increment rate of vascular endothelial cells co-cultured with LNCaP, PC3 and DU145 (P <0.05). The expression of CD31, VEGF, PDGF and CNNM1 genes in LNCaP, PC3 and DU145 cells was inhibited by G-Rh2. Overexpression of CNNM1 reversed the inhibitory effect of G-Rh2 on the expression of CD31 in these cells (P <0.05), while the function of knockout of CNNM1 and the inhibitory effect of G-Rh2 appeared to be similar (P <0.05). In conclusion, G-Rh2 inhibited prostate cancer growth by inhibiting its angiogenesis through decreasing the expression of CNNM1 in the cancer cells.

The transverse and vertical distribution of prostate cancer in biopsy and radical prostatectomy specimens.

BACKGROUND: Prostate biopsy is the most common method for the diagnosis of prostate cancer and the basis for further treatment. Confirmation using radical prostatectomy specimens is the most reliable method for verifying the accuracy of template-guided transperineal prostate biopsy. The study aimed to reveal the spatial distribution of prostate cancer in template-guided transperineal saturation biopsy and radical prostatectomy specimens. METHODS: Between December 2012 to December 2016, 171 patients were diagnosed with prostate cancer via template-guided transperineal prostate biopsy and subsequently underwent laparoscopic radical prostatectomy. The spatial distributions of prostate cancer were analyzed and the consistency of the tumor distribution between biopsy and radical prostatectomy specimens were compared. RESULTS: The positive rate of biopsy in the apex region was significantly higher than that of the other biopsy regions (43% vs 28%, P < 0.01). In radical prostatectomy specimens, the positive rate was highest at the region 0.9-1.3 cm above the apex, and it had a tendency to decrease towards the base. There was a significant difference in the positive rate between the cephalic and caudal half of the prostate (68% vs 99%, P < 0.01). There were no significant differences between the anterior and posterior zones for either biopsy or radical prostatectomy specimens. CONCLUSION: The tumor spatial distribution generated by template-guided transperineal prostate biopsy was consistent with that of radical prostatectomy specimens in general. The positive rate was consistent between anterior and posterior zones. The caudal half of the prostate, especially the vicinity of the apex, was the frequently occurred site of the tumor.

Comparison of lesions detected and undetected by template-guided transperineal saturation prostate biopsy.

OBJECTIVES: To compare the characteristics of lesions detected or undetected by template-guided transperineal saturation prostate biopsy and to evaluate the potential impact of undetected lesions. MATERIALS AND METHODS: We evaluated the characteristics of lesions in radical prostatectomy (RP) specimens, compared the differences between lesions detected and undetected by systematic transperineal ultrasonography-guided 11-region biopsy with regard to tumour volume, Gleason score, surgical margin, spatial location and clinical significance, and assessed the potential impact of undetected clinically significant lesions. RESULTS: The median number of biopsy cores was 24. Sixty-four percent of the clinically significant lesions (170/264) were detected. There were significant differences between the detected and undetected lesions in tumour volume, Gleason score and clinical significance. Inconsistencies found in lesion position between biopsy and RP specimens in the anterior and posterior zones and the left and right sides was 3.4% (7/203) and 5.4% (11/203), respectively. Of the 129 patients, 13 (10.1%) were found to have undetected clinically significant lesions in the biopsy lying on the same side but in a different zone from the detected clinically significant lesions, whereas 23 patients (17.8%) had undetected clinically significant lesions in the biopsy lying on the opposite side from the detected clinically significant lesions. CONCLUSIONS: Template-guided transperineal saturation prostate biopsy detected approximately two-thirds of clinically significant lesions. Most of the undetected lesions were those with small tumour volume. Approximately 20-30% of patients had clinically significant undetected lesions in a different lobe or different quadrant from the detected lesions in the biopsy.

Transperineal template-guided prostate biopsy: 10 years of experience.

OBJECTIVE: To assess the efficacy and safety of transperineal template-guided prostate biopsy. MATERIALS AND METHODS: From December 2003 to December 2013, a total of 3 007 patients (30-91 years old, mean age 69.1) who met the inclusion criteria underwent 11-region transrectal ultrasound-guided transperineal template prostate biopsy. The inclusion criteria included a prostate-specific antigen (PSA) level of 4.0 ng/mL or greater and abnormal prostate gland findings on digital rectal examination, ultrasound, CT or MRI. The median PSA level was 11.0 ng/mL (range 0.2-100 ng/mL). The prostate cancer detection rate and prostate biopsy adverse effects, as well as prostate cancer spatial distribution were analyzed. RESULTS: A mean of 19.3 cores (range 11-44) were obtained for each biopsy, and more cores were obtained in larger prostates than in smaller ones. One to four cores were collected from each region. Prostate cancer was detected in 1 067 of the 3 007 patients (35.5%). The prostate cancer detection rates in groups with PSA levels of 0-4.0 ng/mL, 4.1-10.0 ng/mL, 10.1-20.0 ng/mL, 20.1-50.0 ng/mL, and 50.1-100.0 ng/mL were 15.3% (27/176), 21.0% (248/1 179), 32.6% (318/975), 56.0% (232/414), and 92.0% (241/262), respectively. The mean positives for cancer in regions 1-10 and region 11 (the apical region) were 46.7% vs 52.0% (P = 0.014). Regarding adverse effects, 47.0% of the patients reported hematuria, 6.1% developed hemospermia, 1.9% required short-term catheterization after biopsy because of acute urinary retention, and 0.03% (one patient) developed urosepsis. CONCLUSIONS: Transrectal ultrasound-guided transperineal template prostate biopsy is safe and accurate. The current study suggests that prostate carcinoma foci are more frequently localized in the apical region.

Outcomes of T3a Prostate Cancer with Unfavorable Prognostic Factors Treated with Brachytherapy Combined with External Radiotherapy and Hormone Therapy.

OBJECTIVE: To evaluate the outcomes of T3a prostate cancer with unfavorable prognostic factors treated with permanent interstitial brachytherapy combined with external radiotherapy and hormone therapy. METHODS: From January 2003 to December 2008, 38 patients classified as T3a prostate cancer with unfavorable prognostic factors were treated with trimodality therapy (brachytherapy + external radiotherapy + hormone therapy). The prescription dose of brachytherapy and external radiotherapy were 110 Gy and 45 Gy, respectively. The duration of hormone therapy was 2-3 years. The endpoints of this study included biochemical failure-free survival (BFFS), distant metastasis-free survival (DMFS), cancer-specific survival (CSS), and overall survival (OS). Survival curves were calculated using the Kaplan-Meier method. The Log-rank test was used to identify the prognostic predictors for univariate analysis. RESULTS: The median follow-up was 71 months. The serum pre-treatment prostate-specific antigen (PSA) level ranged from 10.0 to 99.8 ng/ml (mean 56.3 ng/ml), the Gleason score ranged from 5 to 9 (median 8), and the percentage of positive biopsy cores ranged from 10% to 100% (mean 65%). The 5-year BFFS, DMFS, CSS, and OS rates were 44%, 69%, 82%, and 76%, respectively. All biochemical failures occurred within 40 months. The percentage of positive biopsy cores was significantly correlated with BFFS, DMFS, and OS (all P=0.000), and the Gleason score with DMFS (P=0.000) and OS (P=0.001). CONCLUSIONS: T3a prostate cancer with unfavorable prognostic factors presents not so optimistic outcome. Hormone therapy should be applied to prolong the biochemical progression-free or metastasis-free survival. The percentage of positive biopsy cores and the Gleason score are significant prognostic factors.