Malignant melanoma: Mayo Clinic experience

Area of Science:

• Oncology
• Surgical Oncology
• Dermatology

Background:

• Malignant melanoma treatment strategies require ongoing evaluation.
• Understanding prognostic factors is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the Mayo Clinic's experience in managing trunk and extremity melanoma.
• To summarize survival data and treatment outcomes for melanoma patients.

Main Methods:

• Review of previous Mayo Clinic studies on malignant melanoma management.
• Analysis of a prospective trial involving elective lymph node dissection in 171 patients.
• Cox stepwise multiple regression analysis of treatment variables in 535 patients.

Main Results:

• Elective lymph node dissection showed no advantage in overall or disease-free survival.
• Lesion thickness and level of invasion strongly correlated with survival.
• 5-year survival rates varied significantly by lesion thickness (98% for <0.76 mm vs. 45% for ≥4 mm).

Conclusions:

• Elective lymph node dissection is not recommended for trunk and extremity melanoma.
• Close patient follow-up and lymph node dissection upon suspicion of involvement are preferred.
• Melanoma lesion thickness is a critical determinant of patient survival.