Prognostic relevance of CD105-assessed microvessel density in laryngeal carcinoma.

OBJECTIVE

To examine immunohistochemical expression of CD105 among patients with laryngeal cancer and investigate the prognostic significance of CD105-assessed microvessel density (MVD).

STUDY DESIGN

Cross-sectional study.

SETTING

University hospital.

SUBJECTS AND METHODS

The study comprised 80 patients with laryngeal squamous cell carcinoma who underwent complete excision. Clinicopathological data were collected retrospectively. Immunohistochemical analysis was performed with CD105 (endoglin) antibody. Positive-stained microvessels for CD105 were counted on hot spots of tumors at x200 magnification.

RESULTS

Average CD105-assessed MVD in considered laryngeal squamous cell carcinomas (SCCs) was 12.9 (SD 3.84). High expression of CD105 correlated significantly with advanced T (tumor) classification (P = 0.008), advanced TNM (tumor, node, metastasis) stage (P = 0.001), tumor recurrence (P = 0.001), and age > or =65 years (P = 0.026). The multivariate logistic regression showed that a high CD105+ MVD (odds ratio [OR] 4.27; P = 0.019) and advanced TNM stage (OR 3.72; P = 0.047) were independent markers of tumor recurrence. High MVD, advanced clinical stage, the presence of lymph node metastasis at the time of diagnosis, and age <66 years were associated with worse disease-free survival. Cox regression analysis revealed that expression of CD105 (P = 0.016) and advanced clinical stage (P = 0.05) were the independent factors for disease-free survival.

CONCLUSION

The present results suggest that MVD evaluation with CD105 is a promising prognostic factor for the outcome of patients with laryngeal SCC. CD105-assessed MVD could help to identify patients with more aggressive disease and increased risk of developing malignancy recurrence after treatment.