Optimizing sentinel lymph node detection in melanoma: the value of dual tracer techniques in unpredictable drainage patterns.

Sentinel lymph node biopsy plays a vital role in staging and treatment planning for patients with melanoma. We describe the case of a 54-year-old man with a primary melanoma on the lower back, where preoperative lymphoscintigraphy revealed drainage to both the expected inguinal region and the axilla. This case illustrates the practical value of using both blue dye and scintigraphy to guide sentinel node identification, especially when lymphatic drainage patterns are less predictable.