Expression of E-cadherin in human colorectal cancer.

AIM: To investigate the expression of E-cadherin, a calcium-dependent cell-cell adhesion molecule in colorectal carcinoma. Antibodies to E-Cadherin were used to establish the association of their expression with the clinicopathological characteristics of this disease using immunohistochemical methods. METHODS: Immunohistochemical analysis for E-cadherin was carried out in formalin-fixed, paraffin-embedded sections of neoplastic colorectal tissues and non-neoplastic ones adjacent to the lesion from 49 patients who underwent surgery, by the standard peroxidase-antiperoxidase method. Expression of this antigen in normal and malignant epithelium and stromal cells was compared. RESULTS: Both neoplastic and normal tissues showed expression of E-cadherin. There was, however, higher expression of E-cadherin in epithelial cells in both tumour and normal tissues than stromal cells. The percentage of expression in epithelial cells of well-differentiated tumours was significantly higher than moderately differentiated tumours. Loss of normal membranous expression and the presence of cytoplasmic and mixed staining were found frequently in tumour tissues (p = 0.004). This loss of membranous expression, however, did not correlate with Duke's staging, tumour grade, sex, size or site of the tumour. CONCLUSION: This study suggests that the lower expression of E-cadherin in less differentiated tumours may explain their aggressive nature, although loss of membranous expression was not significantly correlated to Duke's staging, tumour grade, sex, size and site of tumour.

Effectiveness of laparoscopic fundoplication for gastro-oesophageal reflux.

BACKGROUND: Gastro-oesophageal reflux (GERD) is a common condition. Many patients respond to conservative therapy. Severe symptomatic cases and those who fail medical treatment are referred to surgery. The long-term results of open fundoplication surgery have been good with a more than 90% response after 10 years of follow-up. The introduction of laparoscopic fundoplication achieved the same results with shorter hospital stay, a better cosmetic result and less cost to the health care providers. PATIENTS AND METHODS: 74 patients who failed medical treatment for GERD were treated by laparoscopic fundoplication. The Toupet procedure was performed in 66 of these patients, the others patients had a Nissen-type fundoplication. The patients were followed up for a mean period (+/- SD) of 14.8 +/- 8.8 months (range 3-33 months). RESULTS: Most of the patients were males (n = 65). The mean age (+/- SD) of all the patients was 36.1 +/- 9.5 years (range 17-60 years). The majority (93.8%) reported disappearance of symptoms and are not using any antireflux medications. Five patients (6.7%) are considered failures of the procedures. Of these, three patients developed recurrence of reflux symptoms during the follow-up period. The other two patients developed complications, i.e. gas bloat, persistent vomiting and dysphagia which warranted taking down the wraps laparoscopically. Two patients developed a small incisional hernia at the site of the 10 mm port. The mean of hospital stay (+/- SD) was 3.1 +/- 1.3 days (range 1-7 days). CONCLUSION: Laparoscopic fundoplication is safe and effectively relieves reflux symptoms in patients who fail medical treatment.