Immunomagnetic Nanosphere-based Strategy for Rapid, Efficient and Accurate Detection of Lymphnode Metastatic Carcinoma Cells / 分析化学

A strategy based on immunomagnetic nanospheres ( IMNs ) for rapid, efficient and accurate detection of lymphnode metastasis carcinoma cells ( LNMCCs ) was developed in this study. First, IMNs processing magnetism and biological targeting were fabricated by the approach developed by our group previously. Then, LNMCCs in lymph node fine needle aspiration ( LNFNA) specimens were separated and enriched by the immunomagnetic isolation using IMNs. At last, the captured cells were identified with Wright's staining and immunocytochemistry ( ICC) . The separation and enrichment of LNMCCs with immunomagnetic isolation could reduce the background interference of LNFNA specimens effectively; the identification with Wright ' s staining and ICC offered more reliable information for accurate diagnosis, so the sensitivity, specificity and overall diagnostic accuracy had an obvious improvement compared with the conventional cytologic diagnosis. Besides, the simple and rapid incubation of LNFNA specimens with IMNs needed just 5 min, so the cytomorphology of captured LNMCCs could be intactly retained, which enabled to provide important basis for classifying lymphnode metastasis carcinoma ( LNMC ) and the subsequent pathological study. Moreover, the specific capture of epithelial carcinoma cells in LNFNA specimens with IMNs could make a definite diagnosis of the captured cells as LNMCCs, thus realizing the differentiated diagnosis of LNMC and malignant lymphoma. Additionally, this strategy exhibited successful LNMCCs detection in LNFNA specimens from 110 patients and had higher sensitivity ( 98 . 0%) , specificity ( 100 . 0%) , and overall diagnostic accuracy (98. 2%) than the conventional cytologic diagnosis. Therefore, it was a new attempt to use IMNs for detection of LNMCCs in LNFNA specimens from LNMC patients, and offered new ideas for LNMC diagnosis and study.

The expression of thymosin beta 4 in the liver tissues and its clinical significance in children with hepatoblastoma / 安徽医科大学学报

Objective To investigate the expression of thymosin beta4 ( Tβ4 ) in the liver tissues of children with hepatoblastoma ( HB) , and further study the function of Tβ4 in HB metastasis in vitro. Methods Immunohisto-chemistry (IHC) was used to determine expression of Tβ4, E-cadherin andβ-catenin in liver tissues from 19 chil-dren with HB,and further to analyze its function in metastasis of HB cells. Results The positive rate of Tβ4 ( P<0.01 ) in HB liver tissues was significantly higher than it in the adjacent tissues. The positive rates of Tβ4 and nu-clearβ-catenin in HB with lymphnode metastasis were significantly higher than in HB without lymphnode metastasis ( P <0.01 ) . While expression of E-cadherin in HB with lymphnode metastasis was lower than in HB without lymphnode metastasis ( P<0.01 ) . Scratch-wound assay showed that HepG2 cells with Tβ4 knockdown had signifi-cantly lower metastatic ability (P<0.05). Conclusion Tβ4 plays an important role in HB metastasis, suggesting it is a potential target for HB metastasis.

Less than 0.5 cm Papillary Thyroid Cancer / 대한내분비외과학회지

PURPOSE: The authors analyzed the characteristics of papillary thyroid microcarcinomas less than 0.5 cm in diameter to investigate an optimal extent of surgical resection. METHODS: Between October 1994 and October 2003, out of 635 cases of papillary thyroid microcarcinomas, 229 cases less than 0.5 cm in diameter were reviewed retrospectively to analyze their clinical and pathological characteristics. RESULTS: Mean diameter of the carcinomas was 3.9±1.2 mm for carcinomas less than 0.5 cm in diameter (group 1) and 7.7±1.4 mm for carcinomas between 0.5 and 1.0 cm in diameter (group 2). Total thyroidectomy, subtotal thyroidectomy, lobectomy & isthmectomy in group 2 were carried out in 308 (75.9%), 72 (17.7%) and 26 (6.4%) cases. Follow by group 1 were carried out in 109 (47.6%), 84 (36.7%) and 36 (16.7%)cases respectively. Between the two groups, perithyroidal invasion was 29.3% and 49.0%, multifocality was 24.9% and 32.8%, bilaterality was 13.1% and 21.4%, lymph node metastasis was 10.1% and 18.3% respectively with each data showing statistical significance (P<0.05). Completion thyroidectomy was carried out in 14 cases, of which 8 cases revealed carcinomas in the residual thyroid lobe. The group 1 required completion thyroidectomy more than the group 2 (P=0.026). There were less cases of lymph node metastasis among the group 1. Nine out of the 36 cases (25%) of the group 1 which underwent lobectomy & isthmectomy needed completion thyroidectomy, among them 6 cases (66.7%) revealed papillary carcinoma in the residual thyroid lobe. CONCLUSION: Micropapillary cancer was discovered more frequently by increasing the use of ultrasonography. Multifocality, bilateraluty and perithyroidal invasion were observed higher in group 2 rather than group 1. However, the relation between these facts and prognosis will need long term follow up.

Is it Necessary to Dissect Level I in Laryngeal and Hypopharyngeal Squamous Cell Carcinoma? / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Squamous cell carcinoma of the larynx and hypopharynx rarely metastasizes to the submental and submandibular lymph nodes. But comprehensive neck dissection including level I is still regarded as a standard treatment of neck in N+ laryngeal and hypopharyngeal cancer. Material and Methods: 82 comprehensive neck dissections of squamous cell carcinoma of laryngeal and hypopharyngeal cancer in 78 patients treated between 1992 to 1998 were pathologically reviewed. RESULTS: Only two cases of metastasis at the level I was noted. These 2 patients received radical neck dissection as a salvage procedure and had multiple nodes metastasis at other levels. CONCLUSION: Lymph nodes of level I are not believed to be at risk for cancers of the larynx and hypopharynx.

Prediction of lymph node metastasis and the expression of cancer associated genes in endoscopic biopsy specimens of stomach cancer / 中国癌症杂志

Purpose:To study the correlation between lymph node metastasis(LNM) and the expression of 10 cancer associated genes in endoscopic biopsy specimens of stomach cancer and to investigate their value in predicting metastasis.Methods:The expression of CD44V6,E cadherin, VEGF, EGFR, P53, nm23 H1, Fas, FasL, Cath B, Cath D was detected by immunohistochemistry in 44 endoscopic biopsy specimens and correlated to the incidence of LNM. Results:The LNM of stomach cancer was positively correlated with the level of expression of VEGF and EGFR, but negatively correlated with that of Fas expression. Co expressions of VEGF(+)EGFR(+), VEGF(+)E cadherin( ), VEGF(+)Fas( ) and EGFR(+)Fas( ) were related with the LNM respectively. The sensitivity and specificity for predicting LNM were low when 3 single index was observed. The specificity for predicting LNM was increased, but the sensitivity was very much decreased when 4 co indexes were observed. Conclusions:The examination of cancer associated genes in endoscopic biopsy specimens of stomach cancer is of no clinical significance in predicting LNM of stomach cancer.