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Adrenal incidentalomas: should we operate on small tumors in the era of laparoscopy?
Michał Pędziwiatr1, Michał Natkaniec1, Mikhail Kisialeuski1
1Department of Endoscopic, Metabolic and Soft Tissue Tumors Surgery, 2nd Department of General Surgery, Jagiellonian University, Kopernika 21, 31-501 Kraków, Poland.
Abstract:
Tumor size smaller than 4 cm as an indication for surgical treatment of incidentaloma is still a subject of discussion. Our aim was the estimation of the incidence of malignancy and analysis of treatment outcomes in patients with incidentaloma smaller than 4 cm in comparison to bigger lesions. 132 patients who underwent laparoscopic adrenalectomy for nonsecreting tumors were divided into two groups: group 1 (55 pts., size < = 40 mm) and group 2 (77 pts., size > 40 mm). Operation parameters and histopathological results were analyzed. No differences in group characteristics, mean operation time, and estimated blood loss were noted. Complications in groups 1 and 2 occurred in 3.6% and 5.2% of patients, respectively (P = 0.67). Malignancy in groups 1 and 2 was present in 1 and 6 patients, respectively (P = 0.13). Potentially malignant lesions were identified in 4 patients in group 1 and 4 patients in group 2 (P = 0.39). The results do not allow for straightforward recommendations for surgical treatment of smaller adrenal tumors. The safety of laparoscopy and minimal, but impossible to omit, risk of malignancy support decisions for surgery. On the other hand, the risk of malignancy in smaller adrenal tumors is lower than surgical complications, which provides an important argument against surgery.
Insights
Surgical treatment for adrenal incidentalomas smaller than 4cm remains debated. While malignancy risk is low, the decision involves balancing this against potential surgical complications.
Area of Science:
- Endocrinology
- Surgical Oncology
- Adrenal Gland Disorders
Background:
- Adrenal incidentalomas are common, and optimal management for smaller lesions (<4cm) is unclear.
- Surgical intervention is often considered, but the indication for smaller tumors is debated.
Purpose of the Study:
- To evaluate the incidence of malignancy and treatment outcomes for adrenal incidentalomas <4cm versus larger lesions.
- To compare surgical outcomes and histopathological findings between smaller and larger adrenal tumors.
Main Methods:
- Retrospective analysis of 132 patients undergoing laparoscopic adrenalectomy for non-secreting adrenal tumors.
- Patients were divided into two groups: <40mm (Group 1) and >40mm (Group 2).
- Comparison of operative parameters, complication rates, and histopathological results.
Main Results:
- No significant differences in operative time or blood loss between groups.
- Similar complication rates (3.6% vs 5.2%) and rates of potentially malignant lesions (4 vs 4) were observed.
- Malignancy was found in 1 patient (<4cm) versus 6 patients (>4cm), though not statistically significant (P=0.13).
Conclusions:
- The study does not provide definitive recommendations for surgical treatment of smaller adrenal tumors.
- The low malignancy risk in smaller tumors must be weighed against the risks of surgical complications.
- Laparoscopic surgery is safe, but the decision requires careful consideration of individual patient factors and tumor characteristics.
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