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Lymphatic mapping for melanomas of the upper extremity
E Joseph1, A Brobeil, C W Cruse
1Moffitt Cancer Center and Research Institute, University of South Florida, Tampa 33614, USA.
The Journal of Hand Surgery
|August 14, 1999
Summary
Sentinel lymph node biopsy accurately identifies melanoma metastasis in upper extremities. This technique helps determine the need for further treatment, sparing patients unnecessary procedures.
Area of Science:
- Oncology
- Surgical Oncology
- Dermatology
Background:
- Melanoma metastasis can spread to regional lymph nodes.
- Accurate staging is crucial for treatment planning in melanoma patients.
- Sentinel lymph node biopsy (SLNB) is a key diagnostic tool.
Purpose of the Study:
- To evaluate the efficacy of a combined lymphoscintigraphy and lymphatic mapping protocol for identifying sentinel lymph nodes (SLNs) in upper extremity melanomas.
- To assess the accuracy of SLNB in detecting metastatic disease.
- To determine the clinical utility of SLNB in guiding further management.
Main Methods:
- A prospective study of 127 patients with upper extremity melanomas.
- Utilized preoperative lymphoscintigraphy and intraoperative lymphatic mapping with vital blue dye and radiocolloid.
- Analyzed SLN biopsy results and compared them with complete lymph node dissection where performed.
Main Results:
- The protocol successfully identified the SLN in 98% of patients.
- Preoperative lymphoscintigraphy revealed unexpected lymphatic drainage patterns in 12% of cases.
- Metastatic disease was detected in the SLN of 9% of patients.
- In patients with positive SLNs, 17% had further nodal involvement, while 10 patients had SLN as the sole site of metastasis.
Conclusions:
- SLNB is a highly effective method for staging upper extremity melanomas.
- Identifying unpredictable lymphatic pathways is critical for accurate staging.
- A negative SLNB can spare patients the morbidity associated with complete lymph node dissection.