Lymphoscintigraphy for melanoma: is it always predictive for lymphatic basin mapping?

Area of Science:

• Oncology
• Surgical Oncology
• Nuclear Medicine

Background:

• Therapeutic decisions for melanoma are complex due to limited investigative tools and treatment options.
• Surgical extirpation is the primary curative method, with prophylactic regional node dissection considered for specific stage I melanoma patients.
• Lymphoscintigraphy is typically reliable for mapping lymphatic drainage in head and neck melanoma.

Observation:

• This article details a patient with posterior neck melanoma and metachronous metastases to bilateral posterior cervical triangles.
• Preoperative lymphoscintigraphy in clinically node-negative regions failed to identify drainage to either cervical nodal chain.
• This finding suggests a potential false-negative lymphoscintigraphic result.

Findings:

• A discrepancy was observed between lymphoscintigraphy results and the actual metastatic spread in a melanoma patient.
• The study presents a rare case where lymphoscintigraphy did not accurately predict lymphatic basin involvement.
• This highlights a potential limitation of lymphoscintigraphy in specific clinical scenarios.

Implications:

• The infallibility of lymphoscintigraphy for lymphatic basin mapping in melanoma requires further investigation.
• This case raises critical questions about the diagnostic accuracy and clinical utility of lymphoscintigraphy.
• Rethinking diagnostic protocols may be necessary for patients with melanoma and clinically negative nodal regions.