Vascular Endothelial Growth Factor Receptor-3 Expression Predicts Sentinel Node Status in Primary Cutaneous Melanoma

Area of Science:

• Oncology
• Dermatology
• Molecular Biology

Background:

• Cutaneous melanoma metastasis is often predicted by sentinel lymph node (SLN) status.
• Vascular Endothelial Growth Factor (VEGF) and its receptors (VEGFRs) are implicated in tumor angiogenesis and metastasis.
• VEGFR-3's role in melanoma SLN metastasis requires further elucidation.

Purpose of the Study:

• To analyze the expression of VEGF, VEGFR-2, and VEGFR-3 in primary cutaneous melanomas.
• To determine the correlation between VEGFR-3 expression and sentinel lymph node (SLN) status.
• To identify potential predictors of SLN metastasis in melanoma patients.

Main Methods:

• Analysis of 58 primary cutaneous melanoma specimens (29 SLN-positive, 29 SLN-negative).
• Quantification of VEGF, VEGFR-2, and VEGFR-3 protein expression using a scoring system based on percentage of positive cells and staining intensity.
• Statistical analysis including binary logistic regression to identify predictors of SLN status.

Main Results:

• Tumoral VEGFR-3 expression was significantly stronger in SLN-positive melanomas (9.62 ± 3.09) compared to SLN-negative melanomas (6.13 ± 3.87; p < 0.001).
• VEGFR-3 expression and tumor thickness were identified as significant independent predictors of SLN status.
• No significant difference was observed in VEGF or VEGFR-2 expression between the groups (data not shown in abstract).

Conclusions:

• VEGFR-3 expression plays a critical role in the pathogenesis of malignant melanoma.
• VEGFR-3 investigation may improve patient selection for sentinel lymph node biopsy.
• These findings highlight VEGFR-3 as a potential biomarker for melanoma metastasis.