Elsevier

Surgery

Volume 141, Issue 6, June 2007, Pages 728-735
Surgery

Original communication
Inguinal node dissection for melanoma in the era of sentinel lymph node biopsy

https://doi.org/10.1016/j.surg.2006.12.018Get rights and content

Background

With the introduction of sentinel lymph node (SLN) biopsy for melanoma, inguinal lymph node dissections (ILND) are more commonly performed for microscopic disease than for clinically palpable disease. We sought to examine the effect this change has on the morbidity of the operation.

Methods

A retrospective review was performed of all patients who underwent an ILND for melanoma between October 1997 and April, 2006. Clinical and pathologic data were collected and correlated by multivariate analysis with the incidence of a major wound complication.

Results

We identified 212 patients, 132 who underwent an ILND for a positive SLN and 80 for clinically palpable disease. Age, sex, and body mass index (BMI) were similar in both groups. Patients with clinically palpable disease had a significantly greater number of involved nodes (3.0 vs 1.96, P = .0013), more often had ≥4 involved nodes (29% vs 9%, P < .001), and a greater incidence of extranodal extension (47% vs 5%, P < .001). Of the 212 patients, 41 (19%) had a significant wound complication. This complication was significantly higher among patients with clinical disease compared to patients with a positive SLN (28% vs 14%, P = .02). Only BMI (odds ratio of 1.1) and the indication for the procedure (odds ratio of 2.2) were independent predictors of a major wound complication. Lymphedema occurred in 30% of the patients and was only significantly associated with clinical disease (41% vs 24%, P = .025). With a median follow-up of 2 years, regional recurrence was not significantly greater in patients with clinically palpable disease (13% vs 9%, P = not significant [ns]), although this result was possibly due to the significantly greater rate of distant recurrence (49% vs 18%, P < .001) and death (48% vs 21%) in these patients.

Conclusions

Patients undergoing an ILND for a positive SLN have a significantly lower risk of postoperative complication or lymphedema than do patients undergoing ILND for clinically palpable disease. There is a benefit in regard to the morbidity of treatment in surgically staging melanoma patients by SLN biopsy and preventing ILND for palpable disease.

Section snippets

Material and methods

Approval of the study was obtained from the University of Michigan Institutional Review Board. A retrospective review was performed of all patients who underwent an ILND between October 1997 and April 2006. Patients younger than 18 years of age were excluded, as were patients who underwent an ILND for histologies other than malignant melanoma. The clinical and pathologic data of the primary melanoma that were collected included age, sex, height, and body mass index (BMI). Breslow thickness

Results

Between October 1997 and April 2006, we identified 212 patients, 18 years of age and older, who underwent ILND for metastatic melanoma. The average age of the patients at the time of the ILND was 49.6 years (range, 17 to 92 years).

Of the 212 patients, 132 underwent ILND because of micrometastases detected on an SNL biopsy performed at the time of their local excision (Figure). A total of 80 patients underwent ILND because of clinically palpable disease. The majority of these patients, 49 (61%)

Conclusions

Inguinal groin dissection appears to carry an intrinsic risk of wound complication that is greater than that found in most other operations9, 10, 11, 12; reasons for this are multifactorial. Microorganisms in the groin area have been reported to be more numerous than the axilla and to harbor greater pathogenicity.13, 14 Thin flaps created in this area also are vulnerable to devascularization, leading to ischemia, wound edge necrosis, and creation of a portal of entry for infectious organisms.15

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