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BACKGROUND@#Malignant plural effusion (MPE) is one of the most common specimen for liquid biopsy gene detection. This study aims to explore a method for isolating tumor cells from large volume of MPE and evaluate its efficacy and application prospect in gene detection.@*METHODS@#Pleural effusions (>500 mL) from 20 advanced lung cancer patients were obtained by effusion drainage and used to isolate tumor cells with cell separation media Percoll and Ficoll. Cell number and purity were calculated. DNA was extracted from the supernatant (etDNA), total cells and isolated tumor cells of pleural effusion (ETC-DNA) to detect the mutation of tumor-related genes by next-generation sequencing.@*RESULTS@#The median number of cells isolated from malignant pleural effusion was 8.50×10⁴ (interquel range: 9.25×10³-3.75×10⁵), 85.50%±5.80% of the cells were identified as tumor cells. The detection rates of epidermal growth factor receptor (EGFR) gene mutation of etDNA, total cell DNA and ETC-DNA were 70.00%, 50.00% and 70.00%, reseparately, while the median EGFR mutation abundance in 3 components was 16.05% (4.78%-43.06%), 1.09% (0.00%-2.39%), and 33.02% (18.50%-76.70%), respectively. ETC-DNA had good consistency with tissue DNA (P>0.999, kappa=1.000) and etDNA (P>0.999, kappa=1.000). ETC-DNA inclined to have higher EGFR mutation than etDNA, but the result was not statistically significant.@*CONCLUSIONS@#Our method can isolate large amount of tumor cells from a large volume of malignant pleural effusion with high purity. Using ETC-DNA as specimen improves the efficacy of gene detection, thus is worth further study.
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Objective:To review the clinicopathological characteristics and analyze the prognostic factors of hepatoid adenocarcinoma of stomach(HAS).Methods:From August 2012 to June 2017,30 patients with HAS were diagnosed in Daycare of Peking University Cancer Hospital.Clinicopathological data and follow-up information of these patients were retrospectively collected and analyzed.Re-sults:The median age of these 30 patients was 58 years at diagnosis,with a male-to-female ratio of 2.75:1.Twenty-nine patients were confirmed to have lymph node metastases and 7 patients had distant metastases.Ten patients died because of the cancer within the follow-up period.The 1-and 3-year survival rates were 60% and 52%,respectively.Cox multivariate regression revealed that elevated serum CA199 levels,higher lymph node staging,not having undergone radical surgery,and stronger immunohistochemical(IHC)stain-ing intensity of alpha fetoprotein(AFP)were independent poor prognostic factors.Conclusions:Elevated serum CA199 levels,lymph node staging,and IHC staining intensity of AFP are verified in this study as independent risk factors of poor outcome in HAS patients. Early detection and diagnosis of the disease may improve the clinical prognosis.Multidisciplinary team discussions are important in making therapy decisions and radical surgery should be performed whenever possible.
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Objective To investigate the clinicopathological features,diagnosis and treatment experience,in order to improve the recognition of male breast cancer and prepare for the study of standardized treatment of breast cancer.Methods Data of epidemiological characteristics,clinical and pathological parameters,treatment and outcome from 43 male breast cancer patients were collected and analyzed in Peking University Cancer Hospital and Beijing Hospital from January 2009 to December 2014.Results Of these patients,42 (97.6％) cases presented with located tumors,11 (25.5％) cases were on pathological stage Ⅲ or stage Ⅳ,and 40 (93.0％) cases were with hormone receptor positive breast cancer and 3 (6.9％) cases were with human epidermal growth factor receptors (HER)-2 positive breast cancer.Patients were stratified according to more or less than 70 years of age,and there were no significant differences in clinicopathological features between the two year groups.But 3 cases with HER-2 over-expressed were all less than 70 years old.38 (88.4％) patients underwent surgical treatment,among which 32 HR-positive patients (74.4％) received tamoxifen as adjuvant endocrine therapy.The median follow-up periods was 31 months (6.1-55.4 months),7 (16.3％) patients developed local recurrence or distant metastasis.Conclusions Male breast cancer is often diagnosed at a later stage and has inferior outcome.Majority of male breast cancer are found to be HR positive,hence hormonal therapy should be strongly considered.
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Objective To evaluate the effects of adriamycin on QTd and QTcd of cancer patients.Methods QTd and QTcd in 30 cancer patients before and after treated by adriamycin were measured.30 cancer patients treated without adriamycin treatment as control group.Results Value of QTd and QTcd in the patients treated by adriamycin were significantly higher than that before treated by adriamycin(P