Study of the ICG Distribution in Breast Tumours or in Axillary Lymph Nodes of Patients After Neoadjuvant Therapy

Study Overview
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Brief Summary
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We will verify if IV injected ICG may colour breast tumors and axillary lymph nodes after neoadjuvant therapy (chemo- or hormonotherapy)

Detailed Description
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In the operating room: ICG 0.25 mg/kg will be given as an iv injection at least 20 minutes before the beginning of the operation. Optionally, dynamic NIR imaging centered on the tumor bearing breast will be acquired during the 15 minutes after injection (in comparison with standards of known fluorescence intensity). Optionally and in case of tumorectomy, peroperative in vivo imaging of the surgical dissection will be acquired. The tumour and/or the mammary piece (and the axillary piece) of dissection will be directly imaged ex vivo using the PDE camera (in comparison with standards of known fluorescence intensity). In the Laboratory of Pathology: The fresh mammary piece will be processed as usual, but the gross-thick sections will be imaged using the PDE and the fluorescent areas will be defined (and later analyzed in comparison with standards of known fluorescence intensity). After fixation, the tumoral tissues as well as - if identified - non tumoral fluorescent foci will be thereafter processed as usual. All the slides obtained will be analyzed using the NIR fluorescent microscope for the presence or not of detectable ICG and the ICG-positive tissues or compartments (vascular spaces, interstitial spaces, normal and/or tumoral cells, macrophages…) will be determined. If fluorescent foci are identified at the level of the axillary piece, they will be isolated and analyzed like the other lymph nodes. Using the NIR fluorescent microscope, these isolated macroscopically fluorescent structures will be analyzed (lymph node? Other?). Additionally, metastatic lymph nodes will also be controlled for their microscopic fluorescence or not.

Official Title
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Study of the (Intravenously Injected) Indocyanine Green Distribution in Tumour Bearing Breasts and in Axillary Pieces of Dissection of Patients Who Have Received Neoadjuvant Therapy for Histologically Proven Mammary Cancer

Conditions
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Breast Cancer

Intervention / Treatment
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* Drug: Indocyanine Green


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with histopathological diagnosis of mammary cancer who have received neoadjuvant therapy and are candidate, either for tumorectomy, or for mastectomy with complete axillary node dissection, Informed consent form signed. Exclusion Criteria: Diagnosis of mammary cancer established, either by tumorectomy, or by gross biopsy, Age less than18 years old. Inability to give informed consent. History of allergy or hypersensitivity against the investigational product (its active substance or ingredients), to iodine or to shellfish. Apparent hyperthyroidism, autonomous thyroid adenoma, unifocal, multifocal or disseminated autonomies of the thyroid gland. Documented coronary disease. Advanced renal impairment (creatinine > 1,5mg/dl). During the 2 weeks before the enrolment, concurrent medication which reduces or increases the extinction of ICG (i.e. anticonvulsants, haloperidol and Heparin). Pregnancy, breastfeeding

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Indocyanine Green<br>intravenous injection of 0.25mg/kg Indocyanine Green just before surgery | Drug: Indocyanine Green<br>* intravenous injection of 0.25mg/kg Indocyanine Green just before the surgery<br>* Other names: ICG;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| fluorescence intensity of tumoral lesions, scars and healthy tissues after IV injection of ICG in breast cancer patients after neoadjuvant therapy |  | 1 week | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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neoadjuvant therapy