Optical Guided Sentinel Node Biopsy for Staging of Vulvar Cancer (I)

This study is testing a technique called optical-guided sentinel node biopsy for women with vulvar cancer. A sentinel lymph node biopsy removes only the first lymph node(s) that cancer would spread to, avoiding a full lymph node removal. Using a special optical dye (ICG) and imaging, surgeons can find these nodes more precisely, potentially reducing complications from surgery. **You may be eligible if...** - You have been diagnosed with early-stage primary vulvar cancer (FIGO stage IB, tumor smaller than 4 cm) - Or you have a unifocal recurrence in the vulva (tumor smaller than 4 cm) on a side where you have not had prior groin surgery **You may NOT be eligible if...** - You have had prior radiation to the vulva or groin area - You have previously had a sentinel node biopsy or lymph node removal in the relevant groin - You have a known allergy to ICG dye or iodine Talk to your doctor to see if this trial is right for you.