Feasibility of Using SPECT/CT Imaging to Map Lymphatic Drainage Patterns in Prostate Cancer Patients

Prostate Cancer Clinical Trial

Official title:

Practice Procedure for 99mTc-Sulfur Nanocolloid Lymphatic Drainage Mapping in Prostate Cancer Using SPECT-CT (Single Photon Emission Computed Tomography / Computed Tomography)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01008969
• Other study ID #: CC085513, H46038-33934
• Status: Completed
• Phase: N/A
• First received: November 5, 2009
• Last updated: December 29, 2011
• Start date: November 2009
• Est. completion date: December 2010

Study information

• Verified date: December 2011
• Source: University of California, San Francisco
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Food and Drug Administration
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to develop a practice procedure for lymphatic drainage mapping with the intent of providing a new tool that could potentially be used for radiation treatment planning. High-risk prostate cancer patients who are scheduled to be treated with intensity-modulated radiotherapy (IMRT) may be eligible to enroll in this study. 99mTc-sulfur nanocolloid, a radiopharmaceutical ("tracer") will be injected by a urologist using transrectal ultrasound guidance (TRUS)at the UCSF Urology Clinic. Participants will then undergo SPECT/CT imaging at the UCSF Nuclear Medicine Clinic. This study will evaluate the feasibility of transporting patients to the Nuclear Medicine Clinic for imaging within 1-3 hours after administration of 99mTc-sulfur nanocolloid.

Description:

The entire study procedure involves 1) preparation of 99mTc-sulfur nanocolloid, 2) administration of 99mTc-sulfur nanocolloid with transrectal ultrasound guidance, 3) transfer of the patient to the Nuclear Medicine clinic for SPECT/CT (Infinia Hawkeye, GE Healthcare) imaging, and 4) tomographically capturing distributions of 99mTc-sulfur nanocolloid uptake in the patient's lymphatic drainage sites within a practical image acquisition time (1-3 h postinjection) considering the patient transit time between injection and imaging.

Administration of 99mTc-sulfur nanocolloid will be performed at the UCSF Urology clinic. The injection will be performed following the clinically accepted method that has been described by European investigators. 99mTc-sulfur nanocolloid imaging utilizes trace amounts of radioactivity. 100-200 MBq (2.7-5.4 mCi) of 99mTc-sulfur nanocolloid will be administered into two lobes of the prostate gland under transrectal ultrasound guidance with three fractions each into peripheral and central zone of the prostatic apex, mid portion, and base. 1% Lidocaine may be administered for local anesthesia per routine clinical protocol as deemed appropriate by the performing urologist.

The procedure will be considered feasible if the practice procedure (from injection to completion of imaging) is successfully implemented within 3 hours of injection (including patient transport time). Imaging will be considered successful if radiotracer is qualitatively detected within the prostate and local lymphatic system.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: December 2010
• Est. primary completion date: December 2010
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Male

• Age = 18 years

• Diagnosis of definitive high-risk prostate cancer

• Clinically eligible and scheduled for definitive IMRT treatment with pelvic lymph nodal radiation (not a study procedure)

• At least one of the following risk factors:

1. Pathologically confirmed pelvic nodal involvement;

2. Enlarged pelvic lymph nodes (greater than 1 cm in the short axis) visible on CT or MRI images, or

3. Greater than 15% risk of lymph node involvement calculated using the equation:

Risk of positive nodes (%) = (2/3) prostate specific antigen (PSA) + [(Gleason score - 6)] × 10]. This formula is used to estimate the pathologic stage of prostate cancer with preoperative prostate specific antigen (PSA) and Gleason score, and adopted by many radiation oncology clinics, including our own radiation oncology physicians.

• Ability to give written informed consent and willingness to comply with the requirements of the protocol

Exclusion Criteria:

• Any condition that compromises compliance with the objectives and procedures of this protocol, as judged by the principal investigator

Study Design

Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Diagnostic

Related Conditions & MeSH terms

• Prostate Cancer
• Prostatic Neoplasms

Intervention

Other:
• SPECT-CT imaging
SPECT/CT for 3-dimensional mapping of 99mTc-sulfur nanocolloid in order to identify personalized lymphatic drainage patterns

Locations

Country	Name	City	State
United States	UCSF Helen Diller Family Comprehensive Cancer Center	San Francisco	California

Sponsors (1)

Lead Sponsor	Collaborator
University of California, San Francisco

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Percentage of Participants Successfully Completed 99mTc-sulfur Nanocolloid SPECT/CT Within 3 Hours After Injection	Successful completion of 99mTc-sulfur nanocolloid SPECT/CT means that the images were obtained within 3 hours, and the images showed patients' lymphatic drainage.	1 day	No
Secondary	Percentage of Images With Detectable Sentinel Lymph Nodes (LNs) From 99mTc-sulfur Nanocolloid SPECT/CT Scans	There was only one arm for this study. All participants who had prostate cancer received 99mTc-sulfur nanocolloid injection and imaged by SPECT/CT within 3 hours of injection. The imaging studies qualitatively detected radiotracer distribution within the prostate and local lymphatic system. The detection of the radiotracer distribution was performed by experienced attending nuclear medicine physicians at UCSF. The qualitative detection includes visual lymph node uptake seen by SPECT scans overlaid on coregistered CT scans.	1 day	No