To learn if reconstruction of the lymphatic system at the time of axillary lymphadenectomy can reduce the risk of developing lymphedema.

Primary Objectives

- To determine the freedom from lymphedema (FFL) rate at 2 years postoperatively in participants with a diagnosis of IBC undergoing ILR at the time of ALND.

Secondary Objectives

• Estimate the proportion of participants who have lymphedema that persists at 2 years after ILR surgeries.
• Determine baseline lymphatic vessel anatomical or functional characteristics associated with increased risk of lymphedema following ILR.
• Evaluate changes in systemic inflammatory mediators and systemic immune cell function affiliated with lymphedema development.

Inclusion Criteria:

1. Participants diagnosed with IBC.
2. Participants who have been scheduled for ILR/pLVB by their treating physician/surgeon at the time of their axillary lymphadenectomy for breast cancer
3. Participants willing and able to comply with the study protocol requirements and all study-related visit requirements.
4. Female subjects at least 18 years old and capable of providing consent to participate.
5. Females of childbearing potential must have a negative urine pregnancy test within 36 hours prior to study drug administration and agree to use a medically accepted method of contraception for a period of one month following the study.

Exclusion Criteria:

1. Patients known to be pregnant or breast-feeding.
2. Patients with known or suspected iodine or ICG hypersensitivity.
3. Patients unable to remain stationary for one hour.
4. Active cellulitis.
5. Subjects with a preoperative clinical lymphedema diagnosis.
6. Subjects undergoing bilateral ALND.
7. Subjects requiring immediate chest wall reconstruction with a pedicled or microvascular flap, or those that have received preoperative radiation therapy.
8. Patients with BMI >45kg/m2.