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Lymphatic Spread (lymphatic + spread)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Investigating the proximal limit of lymphadenectomy in patients with adenocarcinoma of the oesophagus in the mid-thoracic region

BRITISH JOURNAL OF SURGERY (NOW INCLUDES EUROPEAN JOURNAL OF SURGERY), Issue 3 2000
C. W. Vickery
Aims: The benefit of extended lymphadenectomy in patients with squamous cell carcinoma of the oesophagus is established, but there is little evidence to support this in patients with adenocarcinoma. The aim of this study was to investigate the extent of lymphatic spread of oesophageal adenocarcinomas, and particularly the proximal spread in tumours located in the mid thorax. Methods: Twenty-six consecutive patients with tumours arising between 29 and 35 cm from the incisor teeth underwent three-stage oesophagectomy with two-field lymphadenectomy, including nodes in the recurrent laryngeal chains. The proximal extent was measured by endoscopic ultrasonography and confirmed at operation, with division of the lymph node harvest into anatomical sites according to the Japanese classification of oesophageal cancer. Results: There were 21 men and five women, with a mean age of 64 (range 42,78) years; seven patients were lymph node negative in both the mediastinal and abdominal fields. Six patients had nodal metastases more than 2 cm above the tumour and all had extensive involvement of other nodes at the level of the tumour or below, with 7, 7, 9, 12, 15 and 18 nodes positive. There were no patients in whom nodes above the tumour contained metastases while those at the level or below were clear. Conclusions: Dissection of proximal lymph nodes along the recurrent laryngeal nerve chains in patients with adenocarcinoma of the oesophagus is not warranted. Lymphatic spread above the level of the tumour occurs in association with extensive lymph node involvement elsewhere and removal of proximal nodes from difficult locations is not warranted as a means of improving staging or survival. © 2000 British Journal of Surgery Society Ltd [source]

Real-time RT-PCR detection of CK19, CK7 and MUC1 mRNA for diagnosis of lymph node micrometastases in non small cell lung carcinoma

INTERNATIONAL JOURNAL OF CANCER, Issue 5 2005
Pierre Saintigny
Abstract Metastatic lymph nodes (LNs) are the major prognostic factor in resected non small cell lung carcinoma (NSCLC). However, almost 50% of pN0 patients relapse, suggesting metastatic cells undetected by current staging procedures. A combination of markers [cytokeratins 19 and 7 (CK19, CK7) and mucin type 1 (MUC1) mRNAs] was therefore evaluated by real-time RT-PCR in order to detect occult cancer cells. Forty-three NSCLC tumor samples, 4 micrometastatic, 6 metastatic and 84 histologically negative mediastinal LNs from 19 patients with NSCLC were evaluated as well as blood mononuclear cells from 29 healthy volunteers and 17 benign LNs. When tested on cell lines, RT-PCR was particularly efficient for evaluation of CK19, CK7 and MUC1 mRNA expression. All tumor samples were positive for at least 1 marker and 74% of samples were positive for all 3 markers. CK7 and CK19 mRNA were not detected in benign LN and blood cells from healthy donors in contrast with MUC1 mRNA. Only CK7 and CK19 mRNA were therefore used for evaluation of mediastinal LNs: the 6 histologically metastatic and the 4 micrometastatic LNs were positive for at least one marker. Among the 84 histologically negative LNs, 6 (7%) were positive for at least one marker, potentially changing the stage of 2 out of 19 patients. In conclusion, in our feasibility study, parallel molecular detection of CK19 and CK7 mRNA can be considered a specific diagnostic tool for the assessment of microscopic lymphatic spread. Its prognostic impact remains to be evaluated in a prospective study. © 2005 Wiley-Liss, Inc. [source]

ADVANCES IN CLINICAL PRACTICE: New endoscopic and surgical treatment options for early esophageal adenocarcinoma

JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 9 2010
Susan Gan
Abstract Although the outcome for advanced stage esophageal cancer is poor, the early detection and treatment of early stage disease is usually associated with a much better outcome. Until recently, esophagectomy has been the treatment of choice in fit patients. However, morbidity is significant, and this has encouraged the development of newer endoscopic treatments that preserve the esophagus. These techniques include ablation and mucosal resection. Promising results are described, and endoscopic methods might provide a reasonable alternative for the treatment of early esophageal cancer. However, follow-up remains short and endoscopic treatment does not deal with potential lymphatic spread. Hence, careful selection is required. Minimally invasive techniques for esophageal resection have also been shown to be feasible, although there is only limited evidence that they reduce postoperative morbidity. Better data are still required to demonstrate improved outcomes from endoscopic treatment and minimally invasive esophagectomy. [source]

Mortality association of enhanced CD44v6 expression is not mediated through occult lymphatic spread in stage II colorectal cancer

JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 9 2000
Gerard Clarke
Abstract Background and Aims: In the absence of other metastatic disease, the presence of lymph node metastasis remains the most important determinant of survival in colorectal cancer (CRC). Cluster designation 44 variant 6 (CD44v6) over-expression is associated with worse outcome in all stages of CRC. The CD44v6 is believed to confer metastatic potential through its facilitation of migration, extravasation and proliferation, although the specific means by which it conveys an adverse prognosis in CRC is unknown. The aim of the present study was to determine if CD44v6 over-expression in Stage II CRC subjects was associated with the presence of lymph node micrometastases. Methods: We assessed tumour CD44v6 expression in 43 randomly sampled subjects who had resections for Stage II CRC between 1984 and 1991 by using immunohistochemistry. Micrometastases were sought in corresponding lymph node (LN) sections using keratin immunohistochemistry. Results: There was a statistical trend between tumour CD44v6 over-expression and mortality (P = 0.09) and a significant relationship between LN cytokeratins and mortality (P = 0.01). There was no association between the detection of LN cytokeratins and tumour CD44v6 over-expression. Conclusion: We conclude that the adverse survival effect of CD44v6 over-expression is not mediated though lymphatic spread and postulate that it may therefore facilitate haematogenous metastasis. [source]

Paratracheal Lymph Node Involvement in Advanced Cancer of the Larynx, Hypopharynx, and Cervical Esophagus

THE LARYNGOSCOPE, Issue 9 2003
Conrad V. Timon MD, FRCSI
Abstract Objectives/Hypothesis The presence of nodal metastatic disease in head and neck cancer is the foremost prognostic factor. Although neck dissection is the surgical gold standard for the treatment of cervical lymphatic spread, the paratracheal nodal group is not routinely included in the dissection. The study determined the nodal yield, presence of metastases, and prognostic importance of paratracheal nodes in patients with advanced carcinoma of the upper aerodigestive tract. Study Design Prospective histological and survival analysis. Methods Over a 4-year period (October 1994,June 1998), consecutive patients undergoing laryngectomy with or without pharyngectomy or cervical esophagectomy underwent paratracheal node dissection on a prospective basis. Nodal tissue was examined for the presence of metastases. Statistical comparison of survival probability was determined by use of log-rank/,2 test. Results Fifty patients have been included in the study to date, with a minimal follow-up of 3 years. The average number of paratracheal nodes dissected was three per side (range, 1,5). Thirteen (26%) patients demonstrated histological evidence of paratracheal nodal metastases (larynx, 20%; postcricoid/cervical esophageal region, 43%). Five patients (10%) had positive paratracheal nodes alone in a histologically negative cervical neck dissection. The majority of positive paratracheal nodes were less than 1 cm in diameter and appeared negative preoperatively. The absence of positive paratracheal nodes may have a survival benefit. Conclusion The study highlighted the propensity of advanced carcinoma of the upper aerodigestive tract to involve the paratracheal nodes. This area should be routinely dissected in the surgical management of these tumors. [source]

Prediction of lymphatic invasion by peritumoral lymphatic vessel density in prostate biopsy cores

THE PROSTATE, Issue 10 2008
Kenji Kuroda
Abstract BACKGROUND Lymphatic invasion in radical prostatectomy specimens has been suggested to be an unfavorable prognostic factor in clinically localized prostate cancer. Lymphangiogenesis detected by antibodies specific for lymphatic endothelial cells has been associated with lymphatic invasion and lymph node metastasis in prostate cancer. This study was designed to examine whether lymphangiogenesis in prostate biopsy could predict lymphatic spread in radical prostatectomy specimens. METHODS Paraffin-embedded positive biopsy cores obtained from 99 patients who underwent radical prostatectomy at our institution were immunostained with D2-40 monoclonal antibody, which specifically recognizes lymphatic endothelium. The association between lymphatic parameters in prostate biopsy and pathological parameters in radical prostatectomy specimens was analyzed. RESULTS Peritumoral and intratumoral lymphatic (ITL) vessels were observed in 90 (90.9%) and 23 cases (23.2%). Average and maximal peritumoral lymphatic vessel density (PTLD) and the presence of ITL in positive biopsy cores were significantly associated with positive biopsy core rates (P,=,0.0015 for average PTLD, P,<,0.0001 for maximal PTLD, and P,=,0.0038 for ITL) and lymphatic vessel invasion (P,<,0.0001 for average PTLD, P,<,0.0001 for maximal PTLD, and P,=,0.0322 for ITL). Among preoperative parameters, the biopsy Gleason score (P,=,0.0092, HR,=,6.108) and average PTLD (P,=,0.0034, HR,=,1.860) were significant predictors of lymphatic invasion in radical prostatectomy specimens in multivariate analysis. CONCLUSIONS PTLD in prostate biopsy specimens assessed by immunohistochemistry using D2-40 antibody could be a useful parameter for predicting lymphatic spread of clinically localized prostate cancer. Prostate 68:1057,1063, 2008. © 2008 Wiley-Liss, Inc. [source]