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Comparison of plasma D-dimer and thrombus precursor protein in patients with operable breast cancer as a potential predictor of lymph node metastasis.
Authors:Hyun Kyung Kim  Kyung Soon Song  Kyoung Rhan Lee  Yoon Hee Kang  Young-Joon Lee  Eun-Sook Lee
Institution:Hematologic Malignancies Branch, National Cancer Center, Goyang, Korea.
Abstract:Fibrin formation and removal is continuous during the development of malignancy. Plasma D-dimer is indicative of ongoing fibrinolysis, and circulating soluble fibrin polymer thrombus precursor protein (TpP)] represents thrombogenic activity. We evaluated the relationship between plasma D-dimer and TpP levels with tumor extent and examined the use of these markers as possible predictors of lymph node metastasis in breast cancer. Preoperative plasma levels of D-dimer and TpP were measured in these 120 patients (93 breast cancer, 27 benign breast disease) and 29 healthy controls. Plasma levels of D-dimer in patients with breast cancer were significantly higher than in healthy controls and in those with benign breast disease. Plasma D-dimer levels in patients with breast cancer were found to be significantly increased according to tumor stage. We also observed that plasma levels of D-dimer were higher in patients with lymph node metastasis than in patients without metastasis. In contrast, TpP levels were not significantly different by the tumor stages and lymph node metastasis. In conclusion, increased D-dimer levels in breast cancer may suggest that an ongoing fibrinolysis within breast cancer tissue occurs during tumor progression. Positive D-dimer levels might be useful for identifying metastatic lymph node in patients with operable breast cancer. However, plasma TpP was not found to be a sensitive marker for detecting tumor-associated subclinical coagulopathy.
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