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A Study of Influences of p53 Mutation, Cyclin D1 Over Expression, Ki67 Index, Mitotic Index on the Prognosis of Esophageal Squamous Cell Carcinoma  

Lee Hae Won (Department of Thoracic Surgery, Korean Cancer Center Hospital)
Cho Suk Ki (Department of Thoracic and Cardiovascular Surgery, Bundang Seoul National University Hospital)
Sung Sook Whan (Department of Thoracic Cardiovascular Surgery, Bundang Seoul National University Hospital)
Lee Hyun Joo (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine)
Kim Young Tae (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine)
Kang Moon Chul (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine)
Kim Joo Hyun (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine)
Publication Information
Journal of Chest Surgery / v.38, no.12, 2005 , pp. 835-843 More about this Journal
Abstract
Background: Cancer of the esophagus is one of the most malignant tumors with poor prognosis. The p53 gene alteration, over expression of Cyclin D1, and Ki67 index were thought to be the prognostic factors. However, their clinical significances in esophageal squamous cell carcinoma are controversial and p53 accumulation may not correlate with genetic mutation. The current study investigates their prognostic significance in squamous cell carcinoma of the esophagus. Material and Method: The Subjects studied were 124 esophageal squamous cell carcinoma patients who underwent esophagectomy. The mutation of p53, over expression of Cyclin D1, Ki67 labelling index, mitotic index were examined by using an immunohistochemical staining. We compared the results and investigated the correlation with the mutation of p53, overexpression of Cyclin D1, Ki67 labelling index, mitotic index and tumor size, and duration of survival. Result: There was no correlation between the results in immunohistochemical staining according to age, sex, tumor size, Iymph node status, and clinical stage of the disease. Mutant p53 protein was found in 69 cases (55.6$\%$). Median survival time was 21 months in cases with negative for mutant p53 protein and 22 months in positive cases. There was no significant difference in survival (p=0.46). Median survival time was 22 months in cases with negative for Cyclin D1 and 16 months in positive cases (p=0.18). Median and mean survival time was 22 months and 36 months when Ki67 labeling index was 40 or less (102 cases). Median and mean survival was 16 months and 23 months, when Ki67 labeling index was more than 40 (22 cases). There was significant difference in survival rate (p=0.011). Conciusion: Positivity of p53 and cyclin D1 was not useful in predicting the prognosis in our study. There was no significant correlation among mutant p53 protein accumulation, Cyclin D1 over expression, and Ki67 labeling index. However, in several studies, PCR single strand conformational polymorphism analysis of p53 showed a correlation to the prognosis. We thought that there was a significant discordance between p53 gene mutation and mutant p53 protein accumulation. When Ki67 labeling index was more than 40, prognosis was poorer, Ki67 seems to be a prognostic factor in our study. Therefore, we confirmed the possibility of using molecular markers as prognostic factors.
Keywords
Esophageal neoplasm; Neoplasm;
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