The Role of Surgical Drainage on Complications after Sentinel Lymph Node Biopsy for Melanoma

Background: The real benefit of using drains for reducing the risk of complications in sentinel lymph node biopsy (SLNB) has not been investigated yet. We aimed to evaluate the role of drain after SLNB and to determine if a correlation exists between drains and early complications.Methods: This is a retrospective study of patients who underwent SLNB for melanoma from 2016 to 2021. Patients were dichotomized into two groups according to the use of drain. The between-group comparison (drainage group versus no drainage group) was performed by using Mann-Whitney U test and chi-square test. A regression analysis was conducted to identify predictors of complications.Results: Of 218 individuals analyzed, 18 (8.4%) had postoperative complications. The most common complications were seroma (5.1%) and wound dehiscence (1.4%). The between-group analysis showed no significant differences in complication rate, whereas the operative time was significantly higher in the drainage group (P = 0.007), as well as the hospital stay (P <= 0.0001) and the duration of postoperative antibiotic therapy (P = 0.02). The regression analysis found body mass index and multiple basins of SLNB (axilla with groin) to be significant predictors of having a complication (P = 0.03 and P = 0.05, respectively). The operative time was found to be a predictor of seroma (P = 0.04).Conclusions: Drainage use in SLNB prolonged hospital stays and duration of postoperative antibiotic therapy, thus resulting in higher costs. The preemptive use of drainage is suggested in selected settings of patients.