A review published in Urology Research and Practice examines why recommendations for managing adrenal incidentalomas often differ across international guidelines, particularly when size is used to guide treatment decisions. An adrenal incidentaloma is an adrenal mass found unexpectedly on imaging performed for reasons unrelated to suspected adrenal disease. Most are benign, commonly nonfunctioning adenomas, but a small proportion are malignant or hormone-secreting, which makes risk assessment essential.
The authors compare eight international guideline statements and highlight a consistent theme: smaller lesions generally carry a lower risk of malignancy, yet size thresholds for action are not fully aligned. Many guidelines use 4 cm as a practical cut-off when considering surgery, but important discrepancies remain. Suggested size indications for laparoscopic adrenalectomy vary widely, ranging from less than 4 cm up to 12 cm, depending on the society and the clinical context. Recommendations also differ on follow-up strategies, including how long surveillance should continue and what degree of growth is considered clinically significant.
The key message is that clinicians should be aware of these differences and avoid relying on size alone. Imaging features, hormonal evaluation, patient factors, and local surgical expertise should all inform an individualized management plan.
