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Laparoscopic adrenalectomy for benign adrenal masses: An analysis of patients from the NIS database

Muhammad Asad Khan, MD, John N. Afthinos, MD, FACS, Karen E. Gibbs, MD, FACS

Staten Island University Hospital

Objective: Laparoscopic adrenalectomy (LA) is considered the gold standard for surgical treatment of benign adrenal masses, including those that demonstrate hormonal function. To date, most studies regarding such masses are case series from a single surgeon or a single institution due to their relative infrequency. We sought to compile a significant number of patients using a large, prospectively collected database to better characterize this patient population and the resultant outcomes of this approach.

Methods: The National Inpatient Sample Database was queried for patients discharged from the hospital for adrenalectomy for benign adrenal masses from 2005—2009. Malignant lesions, concomitant nephrectomy or pancreatectomy were excluded from the analysis. Patient comorbid conditions, age and gender were analyzed. Length of stay, in-hospital post-operative complications and mortality were evaluated. These were compared for LA and open adrenalectomy (OA).

Results: A total of 30,204 adrenalectomies were identified during the years 2005 through 2009. Of these, 24,288 were for benign disease. Only 4012 (16.5%) were performed laparoscopically. Unilateral adrenalectomy was performed in 3659 cases (91.2%) and bilateral in 100 cases (2.5%).

Table 1. Demographics and co-morbidities of patients

Lap adernalectomy

N=4012

Open adernalectomy

N=20276

P
Female 2506 (62.9%) 12356 (61.3%) 0.11
Age 52.6 +/- 14.6 52.2 +/- 15.2 0.69
Hypertension 2601 (64.8%) 12216 (60.2%) <.001
Hyperlipidemia 541 (13.5%) 2637(13%) 0.41
Smoking 558 (13.9%) 3020 (14.9%) 0.114
CAD 351 (8.7%) 1559 (7.9%) 0.059

Table 2: Postoperative complications, hospital course and mortality

Lap adrenalectomy

N=4012

Open adernalectomy

N=20276

P
Pneumonia 50 (1.2%) 323 (1.6%) 0.109
Infection 19 (0.2%) 138 (0.7) 0.164
DVT 10 (0.2%) 58 (0.3%) .870
Hemmorhage 36 (0.9%) 331 (1.6%) < .001
Cardiac complications 40 (1.0%) 249 (1.2%) 0.234
Postop shock 10 (0.2%) 49 (0.2%) 0.862
Length of stay 3.4 +/- 5.3 4.5 +/-6.1

< .001

Mortality 24 (0.6%) 89 (0.4%) 0.115

Conclusions: Our investigation yielded a surprisingly low rate of laparoscopic adrenalectomy for benign adrenal disease. It is unclear if this is due to lesion size or surgeon experience.

Among LA there is an overall low, but significant, rate of post-operative pneumonia, hemorrhage and cardiac complications.

Compared to OA, LA has reduced morbidity and shorter hospital stay, especially when performed at teaching hospitals. This suggests that LA should be performed in these settings to effect the best outcomes.


Session: Poster Presentation

Program Number: P559

79

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