ABSTRACT
BACKGROUND/AIM: Pleomorphic carcinoma (PC) of the lung is a rare tumor that usually has an aggressive clinical course and a poor prognosis. Clinical and pathological features remain unclear. The aim of this study was to determine whether tumor angiogenesis of PC is up-regulated compared to that in adenocarcinoma (AD). MATERIALS AND METHODS: We collected 55 cases of PC and AD in which the patients had undergone either lung resection or autopsy and immunohistochemically examined the expression of vascular endothelial growth factor (VEGF), hypoxia-inducible factor (HIF)-1α and microvessel density (MVD) in tissue specimens. RESULTS: VEGF was expressed in many cases of both PC and AD with no significant differences between the groups. In contrast, the expression of HIF-1α and MVD were significantly greater in PC than AD. Median survival time of the PC group was 14.7 months and significantly shorter than that of the AD group. CONCLUSION: MVD and expression of HIF-1α are associated with angiogenesis in PC and confer a poorer prognosis. Tumor angiogenesis provides significant prognostic information regarding clinical outcome in patients with PC.
Subject(s)
Adenocarcinoma/blood supply , Lung Neoplasms/blood supply , Neovascularization, Pathologic/metabolism , Adenocarcinoma/metabolism , Adenocarcinoma/mortality , Adult , Aged , Aged, 80 and over , Angiogenic Proteins/metabolism , Female , Humans , Kaplan-Meier Estimate , Lung Neoplasms/metabolism , Lung Neoplasms/mortality , Male , Middle Aged , Multivariate Analysis , Neovascularization, Pathologic/mortality , Prognosis , Proportional Hazards ModelsABSTRACT
BACKGROUND: Pleomorphic carcinoma (PC) of the lung is a rare tumor that usually has an aggressive clinical course and a poor prognosis. In this study, 75 cases of PC were reviewed to identify its clinical features, and we examined the expression of angiogenic factors. PATIENTS AND METHODS: We immunohistochemically examined the expression of angiogenic factors in tissue specimens of PC. RESULTS: 66 males and 9 females were examined. The median survival time was 16.5 months. The stage and symptomatical diagnosis were significantly associated with the survival. In the immunohistochemical analyses, vascular endothelial growth factor (VEGF) was expressed in many cases of PC. A high score for angiogenesis was significantly related to a poorer prognosis. CONCLUSION: We conclude that PC should be considered an aggressive disease, and that the stage and symptomatical diagnosis are strong prognostic factors. Furthermore, tumor angiogenesis provides significant prognostic information about the clinical outcome in PC.
