The discordant results in serum through reverse syphilis screening algorithm / 中华流行病学杂志

Objective The emerging reverse sequence on syphilis screening program generates special discordant results,characterized with the appearance of both positive treponemal test and negative nontreponemal test at the same time.The aim of this study was to analyze the characteristics of the discordant results among low syphilis prevalence population in China,to provide evidence for improving the process of reverse sequence syphilis screening program.Methods Laboratory data was retrospectively analyzed,under reverse sequence screening algorithm selecting ELISA as the initial screening test for syphilis.All the screening reactive samples were tested by TPPA for confirmation and by quantitative TRUST for the reactivity of syphilis.Results 666 out of a total of 21 049 serum samples were reactive under the screening program.Among the 666 reactive samples,169 were reactive to TRUST.One in the 169 samples was confirmed negative on TPPA,and the faulse positive rate on ELISA was 0.6％ (1/169).In those 666 reactive samples,497 were nonreactive to TRUST.74 in the 497 samples were confirmed negative to TPPA,with faulse positive rate of ELISA as 14.9％ (74/497).In the group of 591 TPPA confirmed positive samples,the TRUST negative rate was found 71.6％ (423/591),significantly higher than the TRUST positive rate (chi-square test,x2=110.025,P=0.000).Conclusion Among the results fiom reverse sequence syphilis screening program,majority of the samples which showed positive treponemal antibody,would have negative nontreponemal antibody.We therefore recommended a more reasonable reverse sequence syphilis algorithm to be used.Faulse positivity could be eliminated if TPPA was performed on all screening reactive samples by ELISA a first and then followed by quantitative TRUST on samples that were TPPA confirmed as positive.

Managing esophageal fistulae by endoscopic transluminal drainage in esophageal cancer patients with superior mediastinal sepsis after esophagectomy / 癌症

The management of postoperative leaks into the mediastinum after esophagectomy remains a challenge. We describe our clinical management of this complication through endoscopic transluminal drainage. Between 2008 and 2011, 4 patients with esophageal squamous cell carcinoma (ESCC) who underwent McKeown-type esophagectomy with two-field lymphadenectomy experienced complicated anastomotic fistulae in the presence of superior mediastinal sepsis. All 4 patients underwent endoscopic transluminal drainage, and all survived. The mean healing period was 50 days (range, 31 to 58 days), the mean stay in the intensive care unit was 7.3 days (range, 1 to 18 days), and the mean hospital stay was 64.5 days (range, 49 to 70 days). Endoscopically guided transluminal drainage should be considered for ESCC patients with superior mediastinal fistulae after esophagectomy.

Analysis of learning process of video-assisted minimally invasive esophagectomy for thoracic esophageal carcinoma / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To evaluate the learning process of video-assisted minimally invasive esophagectomy (MIE).</p><p><b>METHODS</b>One hundred consecutive patients with thoracic esophageal carcinoma were treated by a same team of surgeons, and were divided into 3 groups in chronological order. The former two groups both consisted of 25 patients with thoracoscopy plus laparotomy. The remaining 50 patients were enrolled in the third group with thoracoscopy plus laparoscopy. Clinicopathological data including operative time, blood loss, protection of normal structures, complications, length of ICU stay, postoperative stay, and lymph nodes harvest, were collected and compared between groups.</p><p><b>RESULTS</b>Procedures were accomplished successfully in 96 patients. Only 4 cases were converted to open thoracotomy and none to laparotomy. The median operative time was 310 min and blood loss was 200 ml. The median number of lymph node harvest was 22. The overall complication rate was 50%. Comparison of first two groups revealed that significant differences existed in the preservation rate of arch of azygos vein (P=0.010), bronchial vessels (P=0.038), and exposure rate of thoracic part of left recurrent laryngeal nerve( P=0.048). Comparison of the former and latter 50 patients revealed that significant differences existed in thoracic operative time (P<0.001), blood loss (P=0.025), preservation rate of arch of azygos vein (P=0.001) and bronchial vessels (P<0.001), the number of lymph node harvest in thoracoscopy (P=0.022) and in left recurrent laryngeal nerve chain (P<0.001), and exposure rate of initiate part of left recurrent laryngeal nerve (P=0.002).</p><p><b>CONCLUSION</b>The learning curve of MIE is long and beginners should proceed step by step.</p>

Relationship between epidermal growth factor receptor gene mutation and copy number in Chinese patients with non-small cell lung cancer / 癌症

Epidermal growth factor receptor (EGFR) gene mutation and copy number are useful predictive markers that guide the selection of non-small cell lung cancer (NSCLC) patients for EGFR-targeting therapy. This study aimed to investigate the correlation between EGFR gene mutation and copy number and clinicopathologic characteristics of Chinese patients with NSCLC. NSCLC specimens collected from 205 patients between November 2009 and January 2011 were selected to detect EGFR gene mutations with real-time polymerase chain reaction (RT-PCR) and to detect EGFR gene copy number with fluorescence in situ hybridization (FISH). EGFR mutations primarily occurred in females, non-smokers, and patients with adenocarinomas (all P < 0.001). Tissues from 128 (62%) patients were FISH-positive for EGFR, including 37 (18%) with gene amplification and 91 (44%) with high polysomy. EGFR gene mutation was correlated with FISH-positive status (R = 0.340, P < 0.001). Multivariate analysis showed that not smoking (OR = 5.910, 95% CI = 2.363-14.779, P < 0.001) and having adenocarcinoma (OR = 0.122, 95% CI = 0.026-0.581, P = 0.008) were favorable factors for EGFR gene mutation. These results show a high frequency of EGFR FISH positivity in NSCLC tissues from Chinese patients and a significant relevance between EGFR gene mutations and FISH-positive status. Among the FISH-positive samples, EGFR gene mutation occurred more frequently in samples with gene amplification compared to those with high polysomy, suggesting that EGFR mutation and gene amplification should be used as clinical decision parameters to predict response to EGFR-targeting therapy.

Trend analysis for clinical characteristics and prognosis of adenocarcinoma of cardia / 癌症

<p><b>BACKGROUND AND OBJECTIVE</b>The incidence of adenocarcinoma of the cardia has recently increased. This study compared the clinicopathology and prognosis of patients with gastric cardia adenocarcinoma in different periods between 1984 and 2003.</p><p><b>METHODS</b>A total of 589 patients with pathologically confirmed gastric cardia adenocarcinoma hospitalized in Sun Yat-sen University Cancer Center between 1984 and 2003 were divided into 5-year groups. Retrospective analysis of clinical and prognostic characteristics between the different 5-year groups was conducted.</p><p><b>RESULTS</b>The number of hospitalized patients increased by 134.5%, with an annual increase of 4.6%. Median age was 60 years, with an increase of 5 years. Patients aged between 55 years and 64 years decreased, while patients aged > or = 65 years increased. The male-to-female ratio was 2.88:1, with no significant change. The rates of patients with the stage-I and -II disease changed insignificantly, while patients with stage-III disease increased, and patients with stage-I disease decreased. The 5-year survival rate of all the patients was 28.5%, which increased from 20.9% between 1984 and 1993 to 35.5% between 1994 to 2003.</p><p><b>CONCLUSIONS</b>During the past 20 years, associated with the upward-trending incidence of gastric cardia adenocarcinoma, the admission rate at our hospital of patients with the tumor increased. The median age of the patients also increased. The ratio of men to women had no significant change. The proportion of patients with late-stage disease decreased and prognosis has improved.</p>

Comparison of transthoracic and transabdominal surgical approaches for the treatment of adenocarcinoma of the cardia / 癌症

<p><b>BACKGROUND AND OBJECTIVE</b>Transthoracic and transabdominal approaches are commonly used for the surgical treatment of adenocarcinoma of the cardia. Which approach is better has been controversial for quite a long time. Our study aimed to compare the surgical trauma, range of lymph node dissection, and the prognosis of the transthoracic and transabdominal approaches for the treatment of adenocarcinoma of the cardia.</p><p><b>METHODS</b>The medical records of 331 patients with adenocarcinoma of the cardia treated in our hospital between 1994 and 2003 were analyzed. Of the 331 patients, 284 underwent operation via transthoracic approach and 47 via transabdominal approach. Surgery-related status, postoperative complications, range of removed lymph nodes and prognosis of the two groups were compared.</p><p><b>RESULTS</b>There was no significant difference in surgery-related status and postoperative complications between the two groups (P >0.05). The mean number of removed lymph nodes from the thoracic cavity was much higher in transthoracic group than in transabdominal group (P < 0.001), while that from the abdominal cavity was similar in both groups (P = 0.404). The thoracic lymph node metastasis rate was 18.8% in transthoracic group and 13.3% in transabdominal group. The median survival time was 29 months in transthoracic group and 28 months in transabdominal group, and the 5-year survival rates were 34.9% and 40.1% (P= 0.599).</p><p><b>CONCLUSIONS</b>For the surgical treatment of adenocarcinoma of the cardia, the surgical trauma of the transthoracic approach is similar with that of transabdominal approach. The transthoracic approach has the advantage in thoracic lymph node dissection. The two approaches have no obvious effect on the prognosis.</p>

Associated factors and prognosis of residual cancer after esophagectomy for squamous cell carcinoma of the esophagus / 中华胃肠外科杂志

<p><b>OBJECTIVES</b>To analyze associated factors and the prognosis of patients with residual cancer after esophagectomy for squamous cell carcinoma of the esophagus, and to assess outcomes after salvage treatment.</p><p><b>METHODS</b>Clinical and pathological data of 1074 patients with squamous cell carcinoma of the esophagus who underwent esophagectomy in the Cancer Center of Sun Yat-sen University from 1997 to 2003 were analyzed retrospectively. The relationship between the associated factors (differentiation, location, length of the lesion, surgical route, anastomosis site, T stage, N stage) and the incidence of residual cancer was analyzed, using the chi-squared test and Logistic regression analysis methods. The value and the modality of the salvage treatment were investigated.</p><p><b>RESULTS</b>Forty-four patients had residual cancer (4.3%). Cancers in the upper esophagus were associated with the highest incidence of residual cancer on esophageal stump (6.5%), while the lower esophagus had the highest incidence of residual cancer on gastric stump (0.78%). The Incidence correlated with T and N stage. Logistic regression analysis showed that T and N stage were the risk factors of residual cancer. Three-year survival rate was 22.7% in patients with residual cancer. The mean survival time was 25.2+/-3.3 months. Three-year survival rates of patients with and without salvage treatment were 53.2% and 7.8%, respectively (P=0.027). Three-year survival rate of patients with salvage radiotherapy was 56.0%.</p><p><b>CONCLUSIONS</b>Advanced T and N stage are the risk factors of residual cancer after esophagectomy in the patients with squamous cell carcinoma of the esophagus. Salvage treatment can improve the survival of the patients.</p>

Risk factor analysis of mediastinal lymph node metastasis in non-small cell lung cancer patients and the strategy of mediastinoscopy prior to surgery / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To discuss the strategy of mediastinoscopy for the evaluation of mediastinal lymph node status (metastasis or not) of non-small cell lung cancer (NSCLC) prior to surgery.</p><p><b>METHODS</b>From October 2000 to June 2007, 152 consecutive NSCLC cases pathologically proven and clinically staged I-III were enrolled in the study. Of the 152 cases, there were 118 males and 34 females. Age ranged 24-79 years old and the median age was 58. All cases underwent CT and mediastinoscopy for the evaluation of mediastinal lymph node status prior to surgery. Compared with the results of final pathology, the positive rate of mediastinoscopy and the prevalence of mediastinal lymph node metastasis were calculated in the NSCLC patients with negative mediastinal or hilar lymph nodes on CT scan (the shortest axis of mediastinal or hilar lymph nodes <1 cm). Clinical characteristics used as predictive factor including sex, age, cancer location, type of pathology, T status, cancer type (central or peripheral), size of mediastinal lymph nodes (the shortest axis <1 cm or >1 cm) on CT scan and serum CEA level were analyzed by univariate and multivariate analysis with Binary logistic regression model to identify risk factors of mediastinal metastasis.</p><p><b>RESULTS</b>The positive rate of mediastinoscopy was 11.6% (8/69) and the prevalence of mediastinal metastasis was 20.1% (14/69) in NSCLC with negative mediastinal or hilar lymph nodes on CT scan respectively. In clinical stage I (cT1-2N0M0) NSCLC the positive rate of mediastinoscopy was 11.3% (7/62), N2 accounting for 6.5% (4/62) and N3 4.8% (3/62), respectively; and the prevalence of mediastinal lymph node metastasis was 19.4% (12/62), N2 ccounting for 14.6% (9/62) and N3 4.8% (3/62), respectively. In the whole group both univariate and multivariate analysis showed that adenocarcinoma or mediastinal lymph nodes > or =1 cm in the shortest axis on CT scan was an independent risk factor to predict mediastinal lymph node metastasis. In NSCLC with negative mediastinal or hilar lymph nodes on CT scan both univariate and multivariate analysis showed that adenocarcinoma was a predictor of mediastinal lymph node metastasis. Conclusion We recommend the policy of routine mediastinoscopy in NSCLC prior to surgery if the mediastinal staging was only based on CT scan. Mediastinal lymph nodes > or =1 cm in the shortest axis on CT scan mandates preoperative mediastinoscopy. Adenocarcinoma also indicates mandatory mediastinoscopy even with negative mediastinal or hilar lymph nodes on CT scan.</p>

Evaluation of scalene lymph node or contralateral mediastinum biopsy during mediastinoscopy for non-small cell lung cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To explore the clinical indication of N3 lymph node biopsy during mediastinoscopy for non-small cell lung cancer (NSCLC).</p><p><b>METHODS</b>Cervical mediastinoscopy was performed in 89 patients with clinical stage I-IIIA non-small cell lung cancer prior to thoracotomy. Of those, 12 underwent cervical medistinoscopy combined with right scalene lymph node biopsy and 10 with anterior mediastinotomy.</p><p><b>RESULTS</b>Nine patients were found to have lymph node metastasis (N3 disease) during mediastinosopy. Of those, 6 had contralateral mediastinal lymph node metastasis and 3 cases with right scalene lymph node metastasis. The incidence of N3 disease in the patients with adenocarcinoma, serum CEA > 5 ng/ml and multi-station mediastinal lymph node metastasis was significantly higher than that in those with non-adenocarcinoma, CEA < 5 ng/ml and ipsilateral uni-station mediastinal lymph nodes metastasis (P < 0.05).</p><p><b>CONCLUSION</b>Biopsy of scalene lymph node or contralateral mediastinal lymph node should be performed during mediastinoscopy in order to exclude N3 disease for potentially operable NSCLC patients with adenocarcinoma, serum CEA >5 ng/ml and ipsilateral multi-station mediastinal lymph nodes metastasis.</p>

Prospective comparison of CT versus mediastinoscopy in preoperative evaluation of mediastinal lymph node status in patients with non-small cell lung cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To compare the value of CT and mediastinoscopy in assessment of mediastinal lymph node status in potentially operable non-small cell lung cancer (NSCLC).</p><p><b>METHODS</b>From Oct. 2000 to Jun. 2007, 152 consecutive patients with pathologically proven and stage I to approximately III NSCLC were enrolled into the study. Of the 152 cases, there were 118 males and 34 females, with a median age of 58 years (range, 24 to approximately 79 years). Compared with the final pathology, the sensitivity, specificity, positive and negative predictive values and accuracy of CT and mediastinoscopy for preoperative evaluation of mediastinal lymph node status were calculated, respectively. The accuracy and diagnostic efficacy of CT and mediastinoscopy was compared by Pearson chi(2) test and ROC curve, respectively.</p><p><b>RESULTS</b>The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of detection of mediastinal metastasis was 73.8%, 70.1%, 64.9%, 78.2% and 71.7% by CT, respectively, versus 83.1%, 100.0%, 100.0%, 88.8% and 92.8% by mediastinoscopy, respectively. Both the accuracy and diagnostic efficacy of mediastinoscopy were superior to CT (Pearson chi(2) test, P < 0.001; Z test of the areas under the ROC curve, P < 0.001). The complication rate of mediastinoscopy was 4.6%, and the false negative rate was 7.2%.</p><p><b>CONCLUSION</b>Mediastinoscopy is safe and effective in preoperative assessment of mediastinal lymph node status in potentially operable NSCLC, while CT alone is inadequate.</p>

Clinical significance of hMAM mRNA detection in bone marrow of breast carcinoma patient / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the expression of the human mammoglobin (hMAM) mRNA in bone marrow and its clinical significance in the breast cancer patient.</p><p><b>METHODS</b>Expression of hMAM mRNA was detected using nested reverse transcription polymerase chain reaction (RT-PCR) in the bone marrow aspiration sample from 75 breast cancer patients, 15 patients with benign breast lesions and 8 healthy volunteers as control. The possible correlation of hMAM mRNA expression with clinico-pathological parameters and related molecular markers such as Ki67, p53 and VEGF were analyzed.</p><p><b>RESULTS</b>The sensitivity of RT-PCR in this series reached 10(-6). The hMAM mRNA was found to be positively expressed by RT-PCR in 21 of 75 breast cancer patients with a positive rate of 28.0%. However, hMAM mRNA expression was not detected in the bone marrow aspiration samples from patients with benign breast lesions and healthy volunteers. The hMAM mRNA expression was positively correlated with axillary nodal involvement and progesterone receptor (PR) status (P < 0.05) as well as Ki67 expression in breast cancer tissue (chi2 = 4.936, P = 0.026), but not with age, tumor size, clinical stage, or estrogen receptor (ER) status (P > 0.05).</p><p><b>CONCLUSION</b>RT-PCR is quite sensitive and has a high specificity in detecting the presence of hMAM mRNA in the bone marrow from breast cancer patients. Thereupon, hMAM mRNA may be useful as a molecular biomarker in detecting disseminated tumor cells (DTC) in the bone marrow of breast cancer patients. Positive hMAM mRNA expression result may have an impact upon therapeutic recommendations and patients' prognostic judgement.</p>

Giant pathologic section in the study of optimal length of surgical resection for esophageal carcinoma / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To study the optimal surgical resection length for esophageal carcinoma.</p><p><b>METHODS</b>Specimens of seventy patients with esophageal squamous cell carcinoma resected and collected in our hospital were made into pathologic giant sections. Direct intramural infiltration, multicentric carcinogenic lesion and leaping metastasis were observed in the large slice by microscope. The actual length during the operation was calculated by the ratio of shrinkage.</p><p><b>RESULTS</b>Direct intramural infiltration was found in 51 (72.9%) patients, 39 proximal and 36 distal to the tumor. The mean length of direct intramural infiltration was 0.9 +/- 0.8 cm (4.0 cm maximum) proximally and 0.5 +/- 0.3 cm (2.0 cm maximum) distally. Multicentric carcinogenic lesion was found in 11 (15.7%) patients, 5 proximally, 8 distally and 2 on both sides. Proximal to the tumor, the mean distance between the multicentric carcinogenic lesion and the main lesion plus the length of the multiple carcinogenic lesion was 3.2 +/- 1.5 cm (4.7 cm maximum). Distal to the tumor, it was 3.6 +/- 2.4 cm (9.1 cm maximum). Leaping metastasis was found in 9 (12.9%) patients, 7 proximally and 4 distally. The mean distance between the leaping metastasis and the main lesion plus the length of the leaping metastatic lesion was 1.9 +/- 0.6 cm (2.9 cm maximum) proximally and 1.4 +/- 1.0 cm (2.7 cm in maximum) distally.</p><p><b>CONCLUSION</b>The optimal surgical resection length for esophageal carcinoma should be at least 5 cm proximal to the tumor and total length on the distal side.</p>