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Marrow Micrometastases (marrow + micrometastase)

Distribution by Scientific Domains
Medical Sciences100%

Kinds of Marrow Micrometastases

  • bone marrow micrometastase
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    Selected Abstracts

    CK19 mRNA expression in the bone marrow of patients with esophageal squamous cell carcinoma and its clinical significance

    DISEASES OF THE ESOPHAGUS, Issue 5 2010
    X. Zhang
    SUMMARY The 5-year survival rate in resectable patients with esophageal cancer is only 20% to 36%. Regional relapse and distant metastasis are responsible for the failure of treatment and the majority of cancer-related deaths. Earlier detection of metastases, especially micrometastases, has the potential for more accurate risk stratification in subsequent therapy decisions. No effective techniques have yet been found to detect metastases in erroneously thought to have early stage disease. This study was designed to investigate the clinical significance of bone marrow micrometastases detected by reverse transcriptase-polymerase chain reaction (RT-PCR) in patients with esophageal cancer. Expression of CK19 mRNA in the bone marrow of 61 patients with esophageal squamous cell carcinoma (ESCC) and 15 benign pulmonary and esophageal disease patients was assessed via RT-PCR. Correlation of CK19 mRNA expression to the clinicopathologic features and prognosis of the 61 patients was analyzed: 21.3% (13/61) were positive for expression of CK19 mRNA in patients with ESCC. No CK19 mRNA was detected of the 15 benign pulmonary and esophageal disease patients. CK19 mRNA expression did not correlate with the clinicopathologic features of the patients with ESCC, but patients with CK19 mRNA-positive bone marrow had earlier recurrence and shorter survival after surgery. In multivariate analysis, CK19 mRNA was found to be an independent predictor of a poor outcome. CK19 mRNA may be used as a molecular maker to detect bone marrow micrometastases in patients with ESCC and may help to select the proper therapy and predict the prognosis. [source]

    Clinical significance of bone marrow micrometastases in esophageal cancer

    DISEASES OF THE ESOPHAGUS, Issue 4 2004
    H. Inoue
    SUMMARY, Using the reverse transcriptase,polymerase chain reaction (RT-PCR), we investigated the clinical significance of bone marrow micrometastases in patients with esophageal cancer. Bone marrow samples from 57 patients with esophageal cancer, who underwent esophagotomy, were investigated by specific RT-PCR for carcinoembryonic antigens (CEA). A total of 40 out of 57 patients (70.1%) were positive for CEA mRNA in the bone marrow. Among curatively resected cases, 34 of 50 patients (68.0%) were positive for CEA. Ten of 13 T1 patients (76.9%) were positive for CEA. Although the CEA-positive rate was high, there was no significant correlation between CEA positivity and any clinical characteristics. Among the 40 CEA-positive patients, 50% have shown recurrence so far. Detection of cancer cells in the bone marrow by RT-PCR may not always correspond to the malignant potential or other characteristics of the tumor. CEA-positive ,micrometastases' might actually represent isolated circulating tumor cells without much biological significance. [source]

    Detection of disseminated tumour cells in bone marrow of patients with isolated liver metastases from colorectal cancer

    JOURNAL OF SURGICAL ONCOLOGY, Issue 4 2003
    Kristin Bjørnland MD
    Abstract Background and Objectives In colorectal cancer (CRC) patients, tumour recurrence is common following potentially curative surgery for liver metastases. This may be caused by occult tumour cells present at the time of surgery. Dissemination of micrometastatic cells may occur early in patients with solid cancer, and micrometastases may signify a poor prognosis. The aim of the present study was to evaluate the frequency of micrometastatic cells in the bone marrow of patients with potentially resectable liver metastases. Methods Twenty millilitres of bone marrow was aspirated from both anterior iliac crests from 48 patients. Mononuclear cells were isolated and incubated with superparamagnetic Dynabeads® coated with an anti-epithelial monoclonal antibody (MOC31). Magnetically selected cells were identified by light microscopy as cells with bead rosettes (>5 beads/cell). Results Micrometastatic tumour cells were identified in four of 48 (8%) patients who all had their liver metastases surgically removed. Two of the four died after 17 and 18 months, respectively, whereas two are alive after 10 and 12 months. None of the 19 inoperable patients had micrometastases. Conclusions The frequency of bone marrow micrometastases in patients with clinically isolated liver metastases from CRC was low. This is biologically interesting, but bone marrow status should not affect current treatment protocols. J. Surg. Oncol. 2003;82:224,227. © 2003 Wiley-Liss, Inc. [source]

    Clinical evidence of neuroendocrine differentiation in a patient with prostate cancer and bone marrow micrometastases

    BJU INTERNATIONAL, Issue 1 2001
    A. Sciarra
    No abstract is available for this article. [source]

    Prognostic Significance of Occult Bone Marrow Micrometastases of Breast Cancer Detected by Quantitative Polymerase Chain Reaction for Cytokeratin 19 mRNA

    CANCER SCIENCE, Issue 9 2000
    Noriko Ikeda
    Amplification of cytokeratin 19 (CK19) transcripts by reverse transcriptase-polymerase chain reaction (RT-PCR) has been shown to be a highly sensitive assay for the detection of bone marrow micrometastases (BMM) of breast cancer, but recent studies have demonstrated the occurrence of false-positive results due to low-level, illegitimately transcribed CK19 in normal bone marrow tissue. One approach to solve this problem is to develop a quantitative CK19 RT-PCR assay and to introduce a cut-off value which can distinguish between illegitimate expression and cancer-specific expression levels. In the present paper, we describe a quantitative CK19 RT-PCR assay using a real-time automated PCR system. The number of CK19 transcripts was normalized to that of GAPDH transcripts as an internal control for quality and quantity of cDNA. The cut-off value for the ratio of CK19 to GAPDH transcripts was set at 10,4 since the ratio never exceeded this value in the control bone marrow samples (n=12). In total, 117 bone marrow aspirates from stage I-III patients with invasive breast cancers were subjected to CK19 RT-PCR assay and immunocytological examination. Forty (34.2%) were found to be BMM-positive by CK19 RT-PCR assay whereas only three (2.6%) were found to be BMM-positive by immunocytology. Multivariate analysis has shown that occult BMM detected by CK19 RT-PCR is a significant risk factor for relapse, being independent of axillary lymph node metastases. [source]