Histomorphometric Evaluation of the Ki-67 Proliferation Rate and CD34 Microvascular and D2-40 Lymphovascular Densities Drives the Pulmonary Typical Carcinoid Outcome

Ki-67 has shown promise as a prognostic factor in pulmonary carcinoids. In this study, we sought to validate the importance of Ki-67 and study the relationships between Ki-67 and other stromal biomarkers of vascular density. We examined Ki-67, CD34 and D2-40 in tumor tissues from 128 patients with surgically excised typical carcinoid of the lung. We used immunohistochemistry and morphometry to evaluate the amount of tumor staining for cellular proliferation (Ki-67), microvascular density (CD34-MVD) and lymphovascular density (D2-40-LVD).

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