A Pilot Trial of Sonoelastography for Planning Tumor-targeted Prostate Biopsy
试验速览
- 阶段
- 不适用
- 状态
- 终止
- 入组人数
- 4
- 试验地点
- 1
- 主要终点
- The Number of Core Biopsies in These Targeted Regions
研究概览
简要总结
Prostate cancer is the most common cancer and the second-leading cause of cancer death amongst men in the United States. Sonoelastography is an imaging technology predicated on reproducible differences in the backscattered ultrasound signal produced by compression of tissues of varying stiffness. It permits measurement of the elastic properties of tissue. These measurements can be transposed onto conventional anatomic ultrasound images, producing a colorized overlay that allows direct visualization of the anatomic distribution of tissue stiffness. In this study, we aim to determine whether prostate biopsies planned with sonoelastographic guidance would be more likely than random prostate biopsies to intersect with foci of carcinoma in the prostate gland, and to determine whether prostate biopsies planned with sonoelastographic guidance would be more likely than random prostate biopsies to yield histopathology representative of the final Gleason Score obtained at pathologic assessment of the resected prostate.
详细描述
Background and Significance Prostate cancer is the most common cancer and the second-leading cause of cancer death amongst men in the United States. Initially, tumors biopsy guided by detected by conventional B-mode transrectal ultrasound (TRUS). Unfortunately, prostate cancer had a highly variable ultrasound echo pattern and may be indistinguishable from normal prostate, and the sonographic appearance of BPH overlaps with that of prostatic carcinoma, which limited the accuracy of conventional ultrasound, producing sensitivity and specificity for prostate carcinoma of only 40-50%. There is therefore an urgent need for better localization and more accurate biopsy of prostate cancer.
Sonoelastography is an imaging technology predicated on reproducible differences in the backscattered ultrasound signal produced by compression of tissues of varying stiffness. It permits measurement of the elastic properties of tissue. These measurements can be transposed onto conventional anatomic ultrasound images, producing a colorized overlay that allows direct visualization of the anatomic distribution of tissue stiffness.
Previously, several studies have reported that the feasibility of sonoelastography to distinguish between benign and malignant nodules and thereby guide biopsy. These assessments were based on the change in anatomic appearance of nodules after compression with a transrectal ultrasound probe. However, these reports did not specify the criteria used to determine that lesions seen by elastography were the same lesions seen by histopathology, did not assess whether biopsies planned with the assistance of sonoelastography would have intersected with the foci of prostate cancer, and did not address the histopathologic characteristics of areas of the prostate that were falsely positive at sonoelastography.
If sonoelastography were to more accurately delineate foci of tumor in the prostate than B mode ultrasound, and it could be used to guide biopsy, then there would be fewer missed cancers at biopsy. In addition, sonoelastography-guided biopsies may be more representative of the ultimate Gleason Score of the tumor.
Specific Aims:
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Age 18 years of age or older.
- •Serum PSA between 4 and 10 ng/mL.
- •A diagnosis of prostate cancer based on extended (twelve core) random prostate biopsy within three months prior to study entry.
- •Clinically localized prostate carcinoma i.e. TNM stage T2c or less.
- •The patient has elected to undergo radical prostatectomy to treat the prostate carcinoma.
- •The patient consents to undergo a diagnostic transrectal ultrasound of the prostate with elastography.
排除标准
- •Any contraindication to transrectal ultrasonography, including prior anorectal surgery, inflammatory bowel disease, rectal fistula, or fissure-in-ano.
研究组 & 干预措施
Sonoelastography
Sonoelastography is an imaging technology predicated on reproducible differences in the backscattered ultrasound signal produced by compression of tissues of varying stiffness.
干预措施: Sonoelastography (Device)
结局指标
主要结局
The Number of Core Biopsies in These Targeted Regions
时间窗: Participants will be followed until prostatectomy pathology is available (average 1 week)
From elastography-prostatectomy pathology correlation, the following data will be obtained, 1) The number of planned core biopsies that would intersect foci of prostate carcinoma, 2) The Gleason Score that would be obtained, assuming that elastographically targeted biopsies sample the targeted region.
次要结局
未报告次要终点
研究者
Anthony Samir
Assistant Radiologist, Ultrasound Imaging Services Assistant Radiologist, Abdominal Imaging & Intervention
Massachusetts General Hospital