Contrast-enhanced dynamic computed tomography for the evaluation of tumor angiogenesis in patients with lung carcinoma.

BACKGROUND

The objective of this study was to investigate the role of contrast-enhanced dynamic computed tomography (CT) in the evaluation of tumor angiogenesis in patients with lung carcinoma and to assess its importance in predicting tumor size and lymph node involvement.

METHODS

Dynamic CT scans were evaluated retrospectively in 130 patients with primary lung carcinoma who did not have distant metastasis and who underwent surgical resection with mediastinal lymph node dissection. Histopathologic findings of vascular endothelial growth factor (VEGF) expression and microvessel density (MVD) were correlated with the maximum attenuation values of time-attenuation curves (MAV) on dynamic CT scans.

RESULTS

The MAV in VEGF positive tumors was greater compared with the MAV in VEGF negative tumors (66.1 +/- 4.6 vs. 30.9 +/- 2.7, respectively; P < 0.0001). An association was found between the MAV in VEGF positive tumors and MVD (correlation coefficient = 0.650; P < 0.0001). No difference was found in tumor size with pathologic confirmation and the MAV, VEGF expression, or MVD. The MAV, VEGF expression, and MVD in lung tumors with lymph node involvement were greater compared with the same values in lung tumors without lymph node involvement.

CONCLUSIONS

The MAV of dynamic CT may be a predictor of tumor angiogenesis in patients with lung carcinoma and lymph node involvement.