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More info
You can access this
clinical trial
if you have
Breast Neoplasm
and you are
between 18 and 70
years old
This is an observational trial.
You are contributing to medical knowledge about your condition.
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The purpose

In addition to axillary lymph node (ALN), internal mammary lymph node (IMLN) chain is also the first-echelon nodal drainage site for metastasis and it provides important prognostic information in breast cancer patients. However, decision about local treatment of IMLN is still being made based on ALN status. The 2016 National Comprehensive Cancer Network Guidelines recommend internal mammary lymph node irradiation for patients with more than 4 positive ALNs (category 1), and strongly consider irradiation for patients with 1 to 3 positive ALNs (category 2A). Therefore, there will be patients in positive ALN subgroup who just face complications of an unnecessary radiation to IMLN and there will be patients in negative ALN subgroup who do not receive adjuvant radiation therapy they really need. Thus, these inclusion criteria of National Comprehensive Cancer Network might lead to over-treatment and under-treatment. Internal mammary sentinel lymph node biopsy (IM-SLNB) provides a less invasive method of assessing the IMLN than surgical dissection. However, low visualization rate of IM-SLN has been a restriction of IM-SLNB. A modified radiotracer injection technique was established in our previous study. This technique could significantly improve the IM-SLN detection rate. The investigators have validated the accurate of the hypothesis and the modified radiotracer injection technique in the previous study. For axillary sentinel lymph node biopsy, the success rate and the accuracy are the most important technical indicators. The relatively lower false-negative rate is a precondition for the widely application of SLNB. Axillary SLNB needs to be accomplished with the cooperation of multi-disciplinary teamwork, including the breast surgery, the radiologist, the nuclear medicine doctor and the pathologist, in order to obtain a better success rate and a lower false-negative rate. Our previous studies confirmed that the modified radiotracer injection technique can greatly improve the IM-SLN detection rate. However, whether the IM-SLNB based on the modified radiotracer injection technique has a low false negative rate or not still need to be confirmed by a further validation research. Furthermore,recently, the investigators propose that if IM-SLN is the only metastatic lymph node and there would be no positive node else in IMLN chain, the radiotherapy and its associated complications could be avoided in these patients. On the other hand, if there is the presence of metastatic non-sentinel lymph node (NSLN) in IMLN chain after IM-SLNB, it is important to predict the risk of IM-NSLN metastasis in IM-SLN positive patients. As there is currently no such model, a predictive model for IM-SLN positive patients to avoid radiotherapy is needed in this situation. Therefore, a new study will be conducted to verify the issues above. In the current study, all the participants (18~70 years of age) would have the preoperative pathology of invasive breast cancer and positive fine-needle aspiration result in their clinical or ultrasonic suspicious axillary lymph node. 99mTc-labeled sulfur colloid was injected into the parenchyma under the ultrasound guidance 3 to 18 hours before surgery. Two syringes of 9.25 to 18.5MBq 99mTc-labeled sulfur colloid in 0.5 to 0.7mL volume were injected at the 6 and 12 o'clock positions 0.5 to 1.0 cm from areola (about 2.0~4.0 cm from the nipple). IM-SLNB was performed in all participants with IMSLN visualized on preoperative lymphoscintigraphy and/or detected by the intra-operative gamma probe. All hotspots in the internal mammary basin were harvested and intra-operative identification of the IM-SLN was based on gamma probe detection. The IM-SLN was sectioned along the long axis into two blocks and all blocks were tested by the frozen section and the touch imprint cytology intra-operatively. Those participants with positive intra-operative results received IMLN dissection. Finally, all the IM-SLN blocks and IM-NSLN dissected were assessed post-operatively by H&E and Cytokeratin 19 stained immunohistochemistry. The conclusion would be drawn through the results mentioned above.

Provided treatments

  • Procedure: IM-SLNB and IMLN dissection

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT03024463. The sponsor of the trial is Shandong Cancer Hospital and Institute and it is looking for 200 volunteers for the current phase.
Official trial title:
The Multi-center Validation Study of Breast Cancer Internal Mammary Lymph Biopsy