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Technetium Tc 99m Sulfur Colloid

Lymphoseek (technetium Tc 99m tilmanocept) Injection is indicated for lymphatic mapping with a hand-held gamma counter to assist in the localization of lymph nodes draining a primary tumor site in patients with breast cancer or melanoma and guiding sentinel lymph node biopsy using a hand-held gamma counter in patients with clinically node negative squamous cell carcinoma of the oral cavity.

Technetium Tc 99m Sulfur Colloid Injection is a radioactive diagnostic agent indicated for use as follows:

In adults, to assist in the:

* localization of lymph nodes draining a primary tumor in patients with
* breast cancer or malignant melanoma when used with a hand-held gamma counter.
* evaluation of peritoneovenous (LeVeen) shunt patency in adults.

Subjects will receive a single intradermal injection of Lymphoseek followed by SPECT imaging conducted in two phases: initial sequential planar imaging at 30 to 60 second intervals for the first 60 minutes and repeated at 90 minutes and 120 minutes, as indicated, for identification of the SLN followed by SPECT/CT for higher resolution imaging in transaxial, coronal, and sagittal planes. Subjects will then proceed to surgery for lymphatic mapping. Lymphoseek positivity will be based upon radioactivity counts derived from the application of the handheld gamma probe ex vivo. Tumor resection or mastectomy will be performed according to standard procedures.

Lymphoseek

Subjects will receive a single intradermal injection of 99mTc-SC followed by SPECT imaging conducted in two phases: initial sequential planar imaging at 30 to 60 second intervals for the first 60 minutes and repeated at 90 minutes and 120 minutes, as indicated, for identification of the SLN followed by SPECT/CT for higher resolution imaging in transaxial, coronal, and sagittal planes. Subjects will then proceed to surgery for lymphatic mapping. 99mTc-SC positivity will be based upon radioactivity counts derived from the application of the handheld gamma probe ex vivo. Tumor resection or mastectomy will be performed according to standard procedures.

Sulfur Colloid

Arash Kardan, MD

To compare the kinetics and efficacy of two functionally different diagnostic agents, Lymphoseek (CD206 receptor targeted) and 99mTc-Sulfur Colloid (SC) (Sulfur Colloid non-specific mapping agent) in intraoperative lymphatic mapping (ILM) and Sentinel Lymph Node Biopsy (SLNB).

Single center, blinded, randomized, parallel-group, comparative study of Lymphoseek and 99mTc-SC in the preoperative and intraoperative detection of lymph nodes in subjects with known breast cancer. All subjects will receive a single dose of 50 μg Lymphoseek radiolabeled with 0.5 millicurie (mCi) Tc 99m or 0.5 mCi of 99mTc-SC. Subjects may also receive up to 1 mL of vital blue dye (VBD) as a companion ILM agent. All radio-labeled agents will be administered in a single intradermal injection.

Sentinel Lymph Node Biopsy Findings in Patients With Breast Cancer

A Randomized, Double-Blinded Trial Comparing Lymphoseek and 99mTc-Sulfur Colloid With Regard to Pre-op Imaging and Imaging Drug Kinetics and Intra-op Lymphatic Mapping and Sentinel Lymph Node Biopsy Findings in Patients With Breast Cancer

The rate of injection site clearance is the time from radiotracer injection to peak SLN radioactive level. Injection clearance rates will be determined by planar SPECT imaging and by SPECT/CT. Subjects will undergo standard sequential planar imaging at 30 to 60 seconds intervals until the sentinel lymph node is seen. Once a sentinel node is located, a SPECT/CT will be performed for higher resolution imaging in transaxial, coronal, and sagittal planes.

SLN uptake rates will be determined by planar SPECT (single-photon emission computerized tomography) imaging and by SPECT/CT (CT-computed tomography). Gamma counts will be obtained at the injection site by standard sequential planar imaging at 30 to 60 seconds intervals until the sentinel lymph node is seen. Once a sentinel node is located, a SPECT/CT will be performed for higher resolution imaging in transaxial, coronal, and sagittal planes. Figures showing the percent of peak activity in the node versus time will be constructed for each radiopharmaceutical. The average uptake rate for each radiopharmaceutical will be computed and the following test will be conducted using a two-sample t-test at a two-sided α=0.05 (one-sided α=0.025) level of significance: H0 (null hypothesis): µLS ≤ µSC vs. HA (alternative hypothesis): µLS \> µSC, (µLS is the average SLN uptake rate of Lymphoseek) (µSC is the average SLN uptake rate of 99mTc Sulfur Colloid).

To compare the number of intraoperatively detected SLNs identified by Lymphoseek and 99mTc-SC on an agent cohort basis

To compare differences in the ratio of intraoperative counts for Lymphoseek vs 99mTc-SC for the hottest harvested axillary Sentinel Lymph Node (SLN) relative to the primary intradermal injection site.

To compare patient pain tolerance (i.e., patient's perceived level of discomfort) at the injection site for Lymphoseek vs 99mTc-SC using Wong-Baker pain rating scale of 0-10, where the higher the score, the higher the pain level.

To compare pathologic assessment of the excised lymph node(s) to confirm the presence/absence of tumor metastases for Lymphoseek vs 99mTc-SC.

Spots Global Cancer Trial Database for Sentinel Lymph Node Biopsy Findings in Patients With Breast Cancer

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