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The investigators examined whether a high PI-RADS v2 score correlates with the presence of prostate cancer. In addition, the investigator inspected whether the lesion size as determined by mpMRI correlates with the presence of prostate cancer. Furthermore, the investigators study aimed to determine the sensitivity and specificity of mpMRI with respect to prostate carcinoma detection.
Purpose: In recent years, multiparametric Magnet Resonance Imaging (mpMRI) has been established as a diagnostic imaging technique of the prostate and its assessment standardized with the "prostate imaging - data and reporting system" (PI-RADS v2). The previously established Likert scale from 1 to 5 has been shown to reflect the increasing probability of a carcinoma. Suspicious MRI lesions can be biopsied in a targeted fashion using ultrasound navigation termed fusion biopsy. The investigators examined whether a high PI-RADS v2 score correlates with the presence of prostate cancer. In addition, the investigators inspected whether the lesion size as determined by mpMRI correlates with the presence of prostate cancer. Furthermore, the investigators study aimed to determine the sensitivity and specificity of mpMRI with respect to prostate carcinoma detection.
Materials and Methods: This prospective study includes 228 consecutive patients, which underwent a perineal MRI-TRUS-fused prostate biopsy (BiopSee®, MedCom Company) during the period of September 2015 to March 2017 at the cantonal hospital Winterthur due to a suspicious PSA value, a suspicious digital rectal examination or a known prostate cancer under active surveillance. 71 patients were excluded due to lack of PI-RADS v2 diagnosis and / or MRI performed at a different center. Targeted biopsies were performed specifically in the indicated MRI lesions and standardized over the rest of the prostate (system biopsy).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| MRI-TRUS fusion prostate biopsy | Single Arm Study, MRI and Prostate-Biopsy on same patient, individual patient acts as own control for intervention |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| MRI-TRUS fusion prostate biopsy | Diagnostic Test | First an advanced MRI prostate image is obtained, annotated and recorded by the Radiology of the Kantonsspital Winterthur. Next, using special fusion technology, the recorded MRI image is fused with a live transrectal ultrasound by the Urologist who performs a MRI/TRUS fusion biopsy. |
| Measure | Description | Time Frame |
|---|---|---|
| Gleason score (minimum 2 to maximum of 10) | Histological grade of the glandular structures of prostate cancer tissue or the difference in appearance compared with a normal structure. Pattern 1 - corresponds to a well differentiated carcinoma. Pattern 2 - corresponds to a moderately differentiated carcinoma. Pattern 3 - invade the surrounding tissue or having an infiltrative pattern; corresponds to a moderately differentiated carcinoma. Pattern 4 - corresponds to a poorly differentiated carcinoma. Pattern 5 - corresponds to an anaplastic carcinoma. The pathologist then sums the pattern-number of the primary and secondary grades to obtain the final Gleason score. Gleason scores range from 2 to 10, with 2 representing the most well-differentiated tumors and 10 the least-differentiated tumors. | 01.09.2015 - 30.03.2017 |
| ISUP (International Society of Urological Pathology) Grading Group (Grade 1 to Grade 5) | New grading system for histological grade of the glandular structures of prostate cancer tissue or the difference in appearance compared with a normal structure Grade Group 1 (Gleason score ≤6) - Only individual discrete well-formed glands Grade Group 2 (Gleason score 3+4=7) - Predominantly well-formed glands with a lesser component of poorly-formed/fused/cribriform glands Grade Group 3 (Gleason score 4+3=7) - Predominantly poorly-formed/fused/cribriform glands with a lesser component of well-formed glands Grade Group 4 (Gleason score 8)
| 01.09.2015 - 30.03.2017 |
| lesion volume (ml) | millilitre; size of suspected areas in prostate gland in MRI | 01.09.2015 - 30.03.2017 |
| PI-RADS v2 (Prostate Imaging Reporting and Data System Version 2) score (1 - 5) |
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Inclusion Criteria:
Exclusion Criteria:
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Men with a suspicious prostate cancer screening for the early detection of prostate cancer (PSA> 4 ng / ml, PSA velocity> 0.75 ng / ml / y or pathological DRE) or a planned re-biopsy in the context of active surveillance with known very-low-risk prostate cancer.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Klinik für Urologie Kantonsspital Winterthur | Winterthur | Canton of Zurich | 8401 | Switzerland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 22700443 | Background | Siegel R, DeSantis C, Virgo K, Stein K, Mariotto A, Smith T, Cooper D, Gansler T, Lerro C, Fedewa S, Lin C, Leach C, Cannady RS, Cho H, Scoppa S, Hachey M, Kirch R, Jemal A, Ward E. Cancer treatment and survivorship statistics, 2012. CA Cancer J Clin. 2012 Jul-Aug;62(4):220-41. doi: 10.3322/caac.21149. Epub 2012 Jun 14. | |
| 24207135 |
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| ID | Term |
|---|---|
| D011471 | Prostatic Neoplasms |
| ID | Term |
|---|---|
| D005834 | Genital Neoplasms, Male |
| D014565 | Urogenital Neoplasms |
| D009371 | Neoplasms by Site |
| D009369 | Neoplasms |
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Prostate biopsies without DNA evaluation
|
|
Radiological grading system of prostate lesions in mpMRI
The PI-RADS v2 system is designed to standardize image acquisition and reporting, and to be used by medical professionals in the initial evaluation of patients to assess the risk of clinically significant prostate cancer that may require biopsy and treatment.
The scale is based on a score "Yes" or "No" for Dynamic Contrast-Enhanced (DCE) parameter, and from 1 to 5 for T2-weighted (T2W) and Diffusion-weighted imaging (DWI). The score is given for each lesion, with 1 being most probably benign and 5 being highly suspicious of malignancy:
PI-RADS 1: very low (clinically significant cancer is highly unlikely to be present) PI-RADS 2: low (clinically significant cancer is unlikely to be present) PI-RADS 3: intermediate (clinically significant cancer is equivocal) PI-RADS 4: high (clinically significant cancer is likely to be present) PI-RADS 5: very high (clinically significant cancer is highly likely to be present)
| 01.09.2015 - 30.03.2017 |
| Prostate specific antigen (PSA) | ng per ml; enzyme secreted by the prostate gland | 01.09.2015 - 30.03.2017 |
| Digital rectal examination (DRE) | consistence of prostate gland | 01.09.2015 - 30.03.2017 |
| Prostate specific antigen - density | ng per ml per ml; The relationship of the prostate specific antigen level to the size and weight (volume) of the prostate. | 01.09.2015 - 30.03.2017 |
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| D005832 |
| Genital Diseases, Male |
| D000091662 | Genital Diseases |
| D000091642 | Urogenital Diseases |
| D011469 | Prostatic Diseases |
| D052801 | Male Urogenital Diseases |