Acute adrenal insufficiency following unilateral radical nephrectomy: a case report

Residual Adrenal Function After Multivisceral Resection With Adrenalectomy in Adult Patients

Importance

The risk of developing adrenal insufficiency (AI) following adrenalectomy has been insufficiently studied in the context of multivisceral resection (MVR).

Objective

To evaluate the incidence of AI in patients undergoing MVR with en bloc adrenalectomy.

Design, Setting, and Participants

Prospective observational longitudinal study in a single referral center including 56 consecutive adult patients undergoing retroperitoneal sarcoma surgery from June 2019 to August 2020. Those who were candidates for MVR with en bloc adrenalectomy and had no preexisting adrenal impairment were considered eligible. Of these, 4 individuals were excluded because they did not receive adrenalectomy at the time of surgery and 2 because they were not considered evaluable for the main end point. Follow-up was set at 4 months after surgery, and 49 patients completed follow-up. Data were analyzed from October 2020 to September 2021.

Exposures

Diagnosis of AI was determined by low-dose (1 μg) adrenocorticotropic hormone (ACTH) stimulation test with a threshold of 20 μg/dL in blood samples retrieved 30 and 60 minutes after stimulation. ACTH test was repeated on postoperative days 1 and 10 and at 4 months' follow-up.

Main Outcome and Measures

The primary end point was incidence and relevance of AI after MVR. Secondary end points were associations with patient- and tumor-related factors, impact on perioperative hemodynamic management, and association with postoperative morbidity and mortality.

Results

Fifty patients (26 female; median [IQR] age, 59 [46-67] years) were evaluable. Incidence of AI was 64% (32 of 50 patients) in the early postoperative period and 38.5% (15 of 39 patients) at follow-up. Patients with AI showed lower postoperative cortisol values. Factors associated with risk of AI at univariate analysis were high American Society of Anesthesiologists score (odds ratio [OR], 0.31; 95% CI, 0.14-0.48) and high malignancy grade (OR, 0.35; 95% CI, 0.24-0.46). Clinical outcomes not associated with AI included morbidity, mortality, reoperation rate, admission to intensive care unit, length of intensive care unit stay, total hospital stay, and long-term quality of life.

Conclusions and Relevance

In this study, AI after MVR with en bloc adrenalectomy was frequent, even in patients with adequate preoperative adrenal function. Despite this, adrenalectomy can be safely performed. Patients at risk should be monitored in the long term to exclude underrated impairment of adrenal function.

The Role of Adrenalectomy in Renal Cancer

CONTEXT

Since the 1960s, routine ipsilateral adrenalectomy (IA) has been considered an integral step in the removal of renal tumors as a part of a radical nephrectomy. However, recent data from the past decade have narrowed the indications for adrenalectomy and called into question the need for adrenalectomy at all in the treatment of renal cell carcinoma (RCC).

OBJECTIVE

We sought to identify the role of adrenalectomy in the treatment of RCC. Specifically, we wanted to answer the following questions: What is the incidence of ipsilateral adrenal involvement by cancer? How reliable is preoperative imaging? What is the rate of ipsilateral and contralateral metachronous recurrence? And finally, what are the potential noncancer sequelae from unnecessary removal of the adrenal gland?

EVIDENCE ACQUISITION

A systematic literature search of Embase, PubMed, Cochrane, and Ovid Medline was performed to identify studies evaluating the role of adrenalectomy during RCC surgery. Only articles published in English from the years 2000-2015 were included. Case reports, articles about primary adrenal tumors, letters to the editor, and surgical technique papers were excluded.

EVIDENCE SYNTHESIS

We found little evidence to suggest that routine IA is associated with a higher risk of short-term surgical or medical complications. We did not find evidence that IA is associated with improved cancer control. Tomographic preoperative imaging of the adrenal gland demonstrating no cancer involvement is rarely wrong (<1% of the time), and the few adrenal lesions missed on imaging can often be identified intraoperatively. Some evidence indicates that IA may be associated with worse long-term survival. Adrenalectomy rates have been decreasing in recent years, reflecting a changing practice pattern.

CONCLUSIONS

IA at the time of kidney surgery for a renal mass should be performed only if radiographic or intraoperative evidence indicates adrenal gland involvement.

PATIENT SUMMARY

We sought to define the role of adrenalectomy in patients with kidney cancer. Although there are not high-quality studies to answer this question definitively, we conclude that the adrenal gland should be spared unless there is clinical evidence of adrenal involvement.

Is adrenalectomy necessary during unilateral nephrectomy for Wilms Tumor? A report from the Children's Oncology Group

PURPOSE

To determine whether performing adrenalectomy at the time of nephrectomy for unilateral Wilms tumor impacts clinical outcome.

METHODS

We reviewed information on all patients enrolled on National Wilms Tumor Study-4 and -5. Data were abstracted on patient demographics, tumor characteristics, surgical and pathologic status of the adrenal gland, and patient outcomes. The primary endpoints were intraoperative spill and five-year event-free survival (EFS) in patients who did or did not undergo adrenalectomy.

RESULTS

Of 3825 patients with complete evaluable data, the adrenal was left in situ in 2264 (57.9%) patients, and was removed completely in 1367 patients (36.7%) or partially in 194 patients (5.2%). Of the adrenal glands removed, 68 (4.4%) contained tumor. Adrenal involvement was more common in patients with stage 3 (9.8%) than stage 2 disease (1.9%; p < 0.0001). After controlling for stage and histopathology, five-year EFS was similar whether or not the adrenal gland was removed (p = 0.48), or involved with tumor (p = 0.81); however, intraoperative spill rates were higher in patients undergoing adrenalectomy (26.1% vs 15.5%, p < 0.0001), likely due to larger tumor size or technical factors. No patient had clinical evidence of adrenal insufficiency or tumor recurrence in the adrenal gland during follow-up (median 9.9 years).

CONCLUSIONS

Sparing the adrenal gland during nephrectomy for unilateral Wilms tumor was not associated with a higher incidence of intraoperative spill and was associated with a similar oncologic outcome, on a per-stage basis, with cases where the adrenal was removed. Thus, adrenalectomy should not be considered mandatory during radical nephrectomy for Wilms tumor.