Prospective Investigation of Robotic Single-port System

Inclusion Criteria: * Prostatectomy: * Patients age 18-75 years * BMI \<=35 kg/m2 * Confirmed localized adenocarcinoma of the prostate * Suitable for minimally invasive prostate cancer surgery Nephrectomy: * Patient age 18-75 years * BMI \<=35 kg/m2 * Kidney disease amenable to nephrectomy or partial nephrectomy * Suitable for minimally invasive kidney surgery Exclusion Criteria: Untreated active infection (includes local kidney infection) * Vulnerable population (ex: prisoners, mentally disabled) * Severe concomitant illness that drastically shortens life expectancy or increases risk of therapeutic interventions (i.e., cancer) * Anatomy unsuitable for endoscopic visualization or minimally invasive surgery * Patient with second primary cancer * Extensive previous abdominal surgery * Prior radiation treatment for prostate or kidney cancer * Patient with distant metastasis * Complex renal vascular anatomy * Patient with kidney cancer - stage T3 or N+ M+ \*\* * Horseshoe kidney\*\* * Previous ipsilateral kidney surgery \*\*- specific to kidney surgery -