Mayo Adhesive Probability Score Is Associated with the Operative Time in Laparoscopic Adrenalectomy

Background: Laparoscopic adrenalectomy (LA) is the standard treatment for adrenal benign tumors, including primary aldosteronism (PA) or Cushing's syndrome (CS). Several obesity-related factors were associated with prolonged total operative time (OT), but perinephric fat characteristics were not assessed. We investigated whether the Mayo adhesive probability (MAP) score, which evaluates perinephric fat characteristics, was associated with OT for LA. Methods: This single-center, retrospective cohort study examined 141 consecutive patients who underwent LA for PA or CS. We reviewed patients' characteristics and OT. MAP scores were recorded using preoperative imaging. The correlation among characteristics data, MAP score, and OT was evaluated. Results: Overall, we assessed 82 women and 59 men. Adrenal tumors were found in 80 PA and 61 CS patients. There were 74 left-sided and 67 right-sided tumors. For all patients, the median age, body mass index, and tumor size were 56 years (interquartile range [IQR] 46-65), 24.1 kg/m2 (IQR 21.7-26.8), and 19 mm (IQR 13-26), respectively. A total of 91 patients had MAP scores of 0, and 50 had MAP >0. The median OT was 183.5 minutes (IQR: 156-224 minutes) in the MAP >0 group and 162 minutes (IQR: 135-194 minutes) in the MAP = 0 group. In single variable analysis (unadjusted), MAP scores >0 and left-sided tumors were correlated with longer OT. Multivariable regression analysis revealed that this correlation was only significant for MAP scores >0. Conclusions: MAP score may be useful in preoperative planning for PA or CS patients undergoing LA.