Bioimpedance Spectroscopy in Detecting Lower-Extremity Lymphedema in Patients With Stage I, Stage II, Stage III, or Stage IV Vulvar Cancer Undergoing Surgery and Lymphadenectomy

Inclusion Criteria:

* Patients with vulvar cancer already enrolled onto Gynecologic Oncology Group (GOG)-0244 who will undergo or have undergone definitive surgery for primary stage I-IV vulvar cancer who will receive a radical vulvectomy or radical local excision with concurrent unilateral or bilateral inguinal or inguinal-femoral lymphadenectomy;

  * Patients who are going to receive multi-modality therapy (radiation +/- chemotherapy) after undergoing surgery are eligible
* Patients who have met the pre-entry requirements
* Patients must have signed an approved informed consent and authorization permitting release of personal health information for GOG-0269 and for GOG-0244
* Patients may undergo sentinel node mapping as long as it is followed by a full lymphadenectomy during the same operative event
* Serum Albumin level of \>= 3.0 within 14 days of entry
* Patients with a GOG performance status of 0, 1, or 2

Exclusion Criteria:

* Patients not enrolled onto GOG-0244
* Patients with any prior clinical history of lower extremity lymphedema
* Patients who have a history of congestive heart failure, chronic renal disease, or chronic liver disease
* Patients with a prior history of chronic lower extremity swelling
* Patients with a GOG Performance Grade of 3 or 4
* Patients with a history of other invasive malignancies if that malignancy included a bilateral lymph node procedure (example: bilateral mastectomies and axillary lymphadenectomies) or if their previous cancer treatment included any of the surgical procedures
* Patients who have had prior lower extremity vascular surgery (arterial or venous)
* Patients who have had prior pelvic bilateral axillary or any pelvic, abdominal, inguinal, or lower extremity radiation therapy
* Patients who are going to receive another elective surgery during the same operative event as their inguinal lymphadenectomy and vulvar surgery
* Patients who undergo sentinel node biopsy without the intention of undergoing a complete lymphadenectomy during that same operative event
* Patients with an implanted cardiac device such as a pacemaker or implantable cardioverter defibrillator
* Patients who are pregnant or currently breastfeeding
* Patients who have been treated for, or are at risk of, bilateral arm lymphedema
* Patients with an allergic reaction to electrocardiogram (EKG) electrodes
* Patients who have had bilateral auxiliary dissection