May MM, et al. - Between 2000 and 2016, 391 cases were studied to estimate the regional recurrence rates of primary melanoma of the head and neck of previous wide local excision to sentinel lymph node biopsy (SLNB) vs other biopsy techniques and survival outcomes in subjects with melanoma of the head and neck. Following biopsy patterns were observed: 77 unknown biopsies, 30 prior wide local excisions (WLE), 105 narrow margin excisional biopsy, 69 punch biopsy, and 110 shave biopsy. They successfully recognized SLNB in all 30 cases whom had an earlier WLE. At 1.2 years and 1.0 years, respectively, 50 regional recurrences in the neck and 27 local recurrences were noted. They concluded the successful performance of sentinel lymph node biopsy for melanoma of the head and neck in patients after previous wide local excision.