View clinical trials related to Neoplastic Cells, Circulating.
Filter by:Verify the Coincidence rate between Circulating tumor cells (CTCs) and tumor tissue or Circulating tumor DNA (ctDNA) of advanced NSCLC patients with Driver gene mutation
Can tumor cells and tumor DNA be sampled from blood samples from prostate cancer patients? Is it possible to understand the causal relationship between the occurrence of the tumor cells and the tumor DNA in the blood by reviewing the patient's medical records, including information about investigations, analytical reports or diagnoses? Can gene defects that may be useful in predicting the best treatment be detected by sequencing individual tumor cells or plasma from blood samples?
Early diagnosis of malignant tumors is pivotal for improving their prognoses. Circulating tumor cells (CTC) in peripheral blood and Volatile organic compounds (VOCs) in exhaled breath are newly developed diagnosis method. Due to the low percentage of CTCs in peripheral blood of cancer patients and the surface structure of lymphocytes (especially megakaryocytes) is often confused with tumor cells, CTC has a high false positive and negative rate. In recent years, the detection of volatile organic compounds (VOCs) in exhaled breath as a simple and noninvasive method has shown broad application prospects in the diagnosis of various diseases. A series of studies of VOCs diagnosing solid tumors the investigators had conducted in the past decade show that VOCs can not only distinguish different types of tumors, but also can make a distinction between different stages. This study was to compare CTC and VOCs with clinical samples. Predictive models will be built employing discriminant factor analysis (DFA) pattern recognition method. Sensitivity and specificity will be determined using leave-one-out cross-validation or an independent blind test set.
This study aims to define the impact of the sequence of vessel interruption on change in CTC and CTC clusters density in the tumor-draining pulmonary vein between the period before surgical manipulation and before tumor-draining vein interruption.
By testing the CTC number of new solitary pulmonary nodule patient, evaluating the correlation of CTC number and benign and malignant lung nodules auxiliary diagnosis, the correlation of CTC number and the size of lung nodules of the malignant patients, the correlation between the CTC number and subtypes of malignant lung nodules patients.The CTC and tumor markers will be detected before the patient received treatment. Tumor markers include Pro-GRP, NSE, CEA, CYFRA211, SCC.
The purpose of this study is to assess the value of circulating tumor cells (CTC)for non-small cell lung cancer in the postoperative recurrence monitoring by comparing the CTCs, CT and tumor markers at different time points.The time of CTC and carcinoembryonic antigen(CEA) detection is baseline, 2~7 days, 3 months, 6 months, 12 months, 24 months, 36 months after the surgery. And the time of CT detection is 6 months, 12 months, 24 months, 36 months after the surgery.
This study is designed to prospectively evaluate whether post-hepatectomy adjuvant transcatheter arterial chemoembolization (TACE) is effective in reducing early recurrence in HCC patients with preoperative CTC ≥2.
The best strategy to prevent colorectal cancer (CRC) death lies in early detection and early treatment at the local disease status of tumor. After curative resection of tumor, there are about 5~10% of stage I, 20~30% of stage II and 40~50% of stage III patients suffering metastasis during subsequent follow-up periods. Although carcinoembryonic antigen (CEA) is the most widely used biomarker for postoperative monitoring of recurrence on asymptomatic patients, it is difficult to use CEA as biological marker to identify the population with high recurrent risk in patients with early-stage cancer because lower than half of patients with early-stage cancer do not have CEA elevation. For improving the survival of patients with early-stage CRC, we need effort to search more useful biological markers to predict the risk of tumor recurrence and to select out patients with high recurrent risk to receive preventive adjuvant therapy. Circulating tumor cells (CTCs) in the blood play an essential role in cancer metastasis. Hence, the detection of CTCs and subsequent analysis can potentially revolutionize the cancer care ranging from screening, diagnosis, monitoring, to drug selection and so on. In the past decade, many methods using magnetic beads (CellSearch), filtration (RareCelletc), or flow cytometry have been developed but all of them have the shortcomings from low sensitivity, low purity, to unable to retrieve cells for downstream molecular analysis and cell culture. Recently, a biomimetic affinity based microfluidic platform has overcome abovementioned technical challenges. Importantly, by using only 2 ml of peripheral blood, Sinica's team has shown that the enumeration of CTCs increases with the CRC disease progression, where the mean CTC counts are 3, 15, 29 and 60 per ml for the stages I, II, III and IV, respectively. The results imply that monitoring CTC enumeration serially may serve as a prediction marker to identify the CRC patients with high probability of recurrence. The aims of this study are toestablishing CTC platform standard operation protocol (SOP) that leads to certification of ISO 13485 and to establish CTC criteria and evaluate its prediction power of early detection of colorectal cancer recurrence.
Cervical cancer is a major health problem for Chinese women. It is estimated that nearly 100,000 new cervical cancer cases occur in China every year, which accounts for about 20 percent of global new cases. Surgery and radiotherapy are two major radical treatment methods for IB-IIB cervical cancer. Unlike the United States and some other countries, most of operable women with IB-IIB cervical cancer received radical surgery other than radiotherapy in China. Patients with recurrence risk factors (lymph node metastasis, deep stromal invasion, positive lymphatic vascular space, et al. ) also received adjuvant therapy after surgery, such as radiotherapy or chemoradiotherapy that are recommended in the NCCN guidelines. However, in China a substantial part of patients especially those admitted to tertiary hospitals received several courses of chemotherapy instead of radiotherapy if they had recurrence risk factors . In our previous study, we found that patients with intermediate risk factors (deep stromal invasion, positive lymphatic vascular space, bulky tumor>4cm) had better disease-free survival and recurrence-free survival when they received chemotherapy compared with radiotherapy. The objective in this study is to investigate whether the advantage of postoperative chemotherapy is a result of circulating tumor cells (CTC) in some of the patients with intermediate risk factors.