Robot-assisted Partial Adrenalectomy for the Treatment of Conn's Syndrome: Surgical Technique, and Perioperative and Functional Outcomes

Background: In the era of minimally invasive surgery, partial adrenalectomy has certainly been underused. We aimed to report surgical technique and perioperative, pathologic, and early functional outcomes of a two-center robot-assisted partial adrenalectomy (RAPA) series.

Objective: To detail surgical technique of RAPA for unilateral aldosterone-producing adenoma (UAPA), and to report perioperative and 1-yr functional outcomes.

Design, setting, and participants: Data of 10 consecutive patients who underwent RAPA for UAPA at two centers from June 2014 to April 2017 were prospectively collected and reported.

Surgical procedure: RAPA was performed using a standardized technique with the da Vinci Si in a three-arm configuration.

Measurements: Baseline and perioperative data were reported. One-year functional outcomes were assessed according to primary aldosteronism surgery outcome guidelines. A descriptive statistical analysis was performed.

Results and limitations: All cases were completed robotically. Median nodule size was 18mm (interquartile range [IQR] 16-20). Intraoperative blood loss was negligible. A single (10%) postoperative Clavien grade 2 complication occurred. Median hospital stay was 3 d (IQR 2-3). Patients became normotensive immediately after surgery (median pre- and postoperative blood pressure: 150/90 and 120/70mmHg, respectively). At both 3-mo and 1-yr functional evaluation, all patients achieved biochemical success (aldosterone level, plasmatic renin activity, and aldosterone-renin ratio within normal range). Complete clinical success was achieved in nine patients, but one required low-dose amlodipine at 6-mo evaluation. At a median follow-up of 30.5 mo (IQR 19-42), neither symptoms nor imaging recurrence was observed.

Conclusions: We demonstrated feasibility and safety of RAPA for UAPA; this technique had very low risk of complications and excellent functional results. Increased availability of robotic platform and increasing robotic skills among urologists make RAPA a treatment option with potential for widespread use in urologic community.

Patient summary: Robot-assisted partial adrenalectomy is a safe, feasible, and minimally invasive surgical approach. Promising perioperative and functional outcomes suggest an increasing adoption of this technique in the near future.