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Journal of Clinical Pathology 2006;59:166-173; doi:10.1136/jcp.2005.028431
Copyright © 2006 by the BMJ Publishing Group Ltd & Association of Clinical Pathologists.

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*Melanoma
*Skin Cancer

ORIGINAL ARTICLE

Tumour lymphangiogenesis is a possible predictor of sentinel lymph node status in cutaneous melanoma: a case–control study

D Massi1, S Puig2, A Franchi1, J Malvehy2, S Vidal-Sicart3, M González-Cao4, G Baroni1, S Ketabchi1, J Palou2, M Santucci1

1 Department of Human Pathology and Oncology, University of Florence, I-50134 Florence, Italy
2 Department of Dermatology, Hospital Clinic, 08036 Barcelona, Spain
3 Department of Nuclear Medicine, Hospital Clinic, Barcelona
4 Department of Oncology, Hospital Clinic, Barcelona

Correspondence to:
Professor D Massi
Dipartimento di Patologia Umana ed Oncologia, Università degli Studi di Firenze, Viale G.B. Morgagni 85, I-50134 Firenze, Italia; Daniela.Massi{at}UNIFI.IT Background: Cutaneous melanoma spreads preferentially through the lymphatic route and sentinel lymph node (SLN) status is regarded as the most important predictor of survival.

Aims: To evaluate whether tumour lymphangiogenesis and the expression of vascular endothelial growth factor C (VEGF-C) is related to the risk of SLN metastasis and to clinical outcome in a case–control series of patients with melanoma.

Methods: Forty five invasive melanoma specimens (15 cases and 30 matched controls) were investigated by immunostaining for the lymphatic endothelial marker D2-40 and for VEGF-C. Lymphangiogenesis was measured using computer assisted morphometric analysis.

Results: Peritumorous lymphatic vessels were more numerous, had larger average size, and greater relative area than intratumorous lymphatics. The number and area of peritumorous and intratumorous lymphatics was significantly higher in melanomas associated with SLN metastasis than in non-metastatic melanomas. No significant difference in VEGF-C expression by neoplastic cells was shown between metastatic and non-metastatic melanomas. Using logistic regression analysis, intratumorous lymphatic vessel (LV) area was the most significant predictor of SLN metastasis (p = 0.04). Using multivariate analysis, peritumorous LV density was an independent variable affecting overall survival, whereas the intratumorous LV area approached significance (p = 0.07).

Conclusions: This study provides evidence that the presence of high peritumorous and intratumorous lymphatic microvessel density is associated with SLN metastasis and shorter survival. The intratumorous lymphatic vessel area is the most significant factor predicting SLN metastasis. The tumour associated lymphatic network constitutes a potential criterion in the selection of high risk patients for complementary treatment and a new target for antimelanoma therapeutic strategies.


Abbreviations: CI, confidence interval; HR, hazard ratio; LVD, lymphatic vessel density; LVA, lymphatic vessel area; LYVE-1, lymphatic endothelial hyaluronan receptor 1; SLN, sentinel lymph node; VEGF-C, vascular endothelial growth factor C

Keywords: D2-40; lymphangiogenesis; melanoma; vascular endothelial growth factor C; sentinel lymph node




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Copyright © 2006 by the BMJ Publishing Group Ltd & Association of Clinical Pathologists.