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From the Division of Surgical Oncology (KMM, CC, SLW, MJE), James Graham Brown Cancer Center, the Division of Otolaryngology-Head and Neck Surgery (EL), and the Division of Plastic and Reconstructive Surgery (WKS), University of Louisville, Louisville, Kentucky; University of Texas M. D. Anderson Cancer Center (MIR), Houston, Texas; LDS Hospital (RDN), Salt Lake City, Utah; and the University of South Florida (DSR), Moffitt Cancer Center, Tampa, Florida.
Correspondence: Address correspondence and reprint requests to: Kelly M. McMasters, MD, PhD, Division of Surgical Oncology, University of Louisville-Brown Cancer Center, 315 East Broadway, Suite 309, Louisville, KY 40202; Fax: 502-629-3393; E-mail: kelly.mcmasters{at}nortonhealthcare.org
Background: Sentinel lymph node (SLN) biopsy for head and neck (H&N) melanomas may be more technically challenging compared with other locations because of complex lymphatic drainage patterns. This analysis was performed to compare the results of SLN biopsy for H&N, truncal, and extremity melanomas.
Methods: The Sunbelt Melanoma Trial includes patients aged 18 to 70 with melanomas
1.0 mm thick. Statistical comparison was performed by
2 or analysis of variance test.
Results: A total of 2610 patients were evaluated with a median follow-up of 18 months. The mean number of SLN per nodal basin was 2.8, 2.7, and 2.1 for H&N, truncal, and extremity melanomas, respectively. Median Clark level, Breslow thickness, and percentage of ulceration were similar between the groups. Peri-parotid SLN was identified in 25% of cases; there were no facial nerve injuries. SLN biopsy for H&N melanoma had higher false-negative rates at 1.5% (vs. 0.5% for trunk or extremity) but less histologically positive SLN at 15% (vs. 23.4%, and 19.5%; P < .001) compared with truncal and extremity melanoma. Blue dye was visualized less frequently in SLN of H&N melanoma patients compared with those with trunk or extremity melanomas.
Conclusions: Preoperative lymphoscintigraphy and meticulous intraoperative search for blue/radioactive nodes may improve results in H&N melanomas.
Key Words: Head and neck melanoma Sentinel lymph node Recurrence Lymphoscintigraphy Nodal basins
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