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Biomedical subjects

J F Slors

Publications and source records attributed to J F Slors.

At least 19 recordsLinked to original sources
PubMed2003

Decision analysis in the surgical treatment of colorectal cancer due to a mismatch repair gene defect.

BACKGROUND: In view of the high risk of developing a new primary colorectal carcinoma (CRC), subtotal colectomy rather than segmental resection or hemicolectomy is the preferred treatment in hereditary non-polyposis colorectal cancer (HNPCC) patients. Subtotal colectomy however implies a substantial decrease in quality of life. To date, colonoscopic surveillance has been shown to reduce CRC occurrence. AIMS: To compare the potential health effects in terms of life expectancy (LE) for patients undergoing subtotal colectomy or hemicolectomy for CRC. METHODS: A decision analysis (Markov) model was created. Information on the 10 year risk of CRC after subtotal colectomy (4%) and hemicolectomy (16%) and stages of CRCs detected within a two year surveillance interval (32% Dukes' A, 54% Dukes' B, and 14% Dukes' C) were derived from two cohort studies. Five year survival rates used for the different Dukes stages (A, B, and C) were 98%, 80%, and 60%, respectively. Remaining LE values were calculated for hypothetical cohorts with an age at CRC diagnosis of 27, 47, and 67 years, respectively. Remaining LE values were also calculated for patients with CRC of Dukes' stage A. RESULTS: The overall LE gain of subtotal colectomy compared with hemicolectomy at ages 27, 47, and 67 was 2.3, 1, and 0.3 years, respectively. Specifically for Dukes' stage A, this would be 3.4, 1.5, and 0.4 years. CONCLUSIONS: Unless surveillance results improve, subtotal colectomy still seems the preferred treatment for CRC in HNPCC in view of the difference in LE. For older patients, hemicolectomy may be an option as there is no appreciable difference in LE.

Adult↗
PubMed2001

Functional outcome, quality of life, body image, and cosmesis in patients after laparoscopic-assisted and conventional restorative proctocolectomy: a comparative study.

PURPOSE: The aim of this study was to assess the functional outcome and the quality of life of laparoscopic-assisted ileal pouch-anal anastomosis compared with conventional ileal pouch-anal anastomosis. Further, body image and cosmesis were evaluated in both groups. METHODS: Sixteen patients who underwent a laparoscopic-assisted ileal pouch-anal anastomosis between March 1996 and September 1999 were matched with 19 patients who had a conventional ileal pouch-anal anastomosis. Patients were matched for the time period after surgery, distribution of familial adenomatous polyposis/ulcerative colitis, and one/two-stage procedure. Thirty-two patients agreed to fill out a set of questionnaires that assessed functional outcome, quality of life, body image, and cosmesis. Quality of life was measured with the Short Form 36 Health Survey questionnaire and the Gastrointestinal Quality of Life Index. The Body Image Questionnaire was used to measure patients' perceptions of and satisfaction with their own body and their attitude toward their bodily appearance (body image) and the degree of satisfaction of patients with respect to the physical appearance of the scar (cosmesis). RESULTS: Patients in the conventional group were older than patients in the laparoscopic-assisted group (mean 39.2 +/- 8.4 vs. 30.6 +/- 7.1 years; P < 0.01). No differences were found in functional outcome and quality of life. Satisfaction with the cosmetic result of the scar was significantly higher in the laparoscopic-assisted group compared with the conventional group. Body image score was higher in the laparoscopic-assisted group when compared with the conventional group, although not significant. CONCLUSIONS: The functional outcome and quality of life of laparoscopic-assisted ileal pouch-anal anastomosis is not different from conventional ileal pouch-anal anastomosis. In the long-term, better cosmesis is the most important advantage after laparoscopic surgery.

Adenomatous Polyposis Coli↗
PubMed2001

Chemokine receptor CXCR3 expression in inflammatory bowel disease.

CD4+ T lymphocytes in the lamina propria (LP) of the gut play a central role in the immune response in inflammatory bowel disease (IBD). CXCR3 is a chemokine receptor expressed on activated T lymphocytes, and a key component for the recruitment of T helper (Th1) effector cells to the site of inflammation. To determine if CXCR3 is involved in localization of T cells to the gut in IBD patients, we investigated the expression of CXCR3 on CD4+ T lymphocytes in the LP and in the submucosa of resection specimens from 51 IBD patients and 15 control patients. Positive cells were microscopically scored using a semiquantitative analysis on a five-point scale. We found that CD4+ T cells, CXCR3+ cells, and CD4+CXCR3+ T cells in the LP were slightly increased in both IBD groups compared with control non-IBD specimens. In addition, CD4+ and CXCR3+ cells in the submucosa were significant increased in the CD group compared with the control group. CD4+ and CXCR3+ expression was not statistically different between CD and UC. Flow cytometry was used to analyze the percentage of CXCR3+ cells within the CD4+ T-cell population isolated from biopsy specimens and peripheral blood from IBD patients and control patients. There was no difference in the percentage of CD4+CXCR3+ cells between the different groups in the gut as well as in the circulation. These results suggest that CD4+CXCR3+ T cells migrate to the normal and inflamed intestinal mucosa, indicating a role in maintaining normal gut homeostasis. The selective expression of CXCR3+ cells in the submucosa of CD patients might also indicate that these cells play a role in inflammation.

Adult↗
PubMed2000

[Proctocolectomy with an ileal pouch-anal anastomosis; results from 100 consecutive patients in the Academic Medical Center at Amsterdam, 1994-1999].

OBJECTIVE: To evaluate the results of proctocolectomy with creation of an ileac pouch anal anastomosis (IPAA). DESIGN: Retrospective. METHOD: Of the 100 patients in whom an IPAA procedure was performed in the period 1994/'99 in the Department of Surgery of the Academic Medical Centre, Amsterdam, the Netherlands, data were collected on the complications: in the patients with a follow-up of over 12 months the functional results were studied. RESULTS: The group comprised 48 males and 52 females with a mean age of 36.3 years (range: 15-62). Preoperative diagnoses were ulcerative colitis (n = 84), familial polyposis coli (12), slow transit obstipation (2), Hirschsprung's disease (1) and Muir-Torre syndrome (1). Median operating time was 2.3 h, peroperative blood and fluid loss 500 ml and median hospital stay 15 days. There was no mortality. Ten patients had a loop ileostomy formation, in 6 because of postoperative complications. A total of 30 patients developed postoperative complications, peroperatively or during follow-up 10 of those patients needed a relaparotomy. After 12 months 1 pouch had to be excised and 2 patients still had a loop ileostomy due to postoperative complications. In 56 patients with at least 12 months follow-up, median 24-hour stool frequency was 6. Eighty-nine per cent of these patients were satisfied or highly satisfied with the overall outcome. CONCLUSION: A proctocolectomy with IPAA formation is a safe procedure with good functional results.

Adenocarcinoma↗
PubMed2000

What is the benefit of preoperative sperm preservation for patients who undergo restorative proctocolectomy for benign diseases?

PURPOSE: In patients with benign colorectal diseases undergoing a restorative proctocolectomy with an ileal pouch-anal anastomosis, semen cryopreservation seems rational to enable the possibility of procreation in case surgery leads to sexual disorders or impotence. The aim of this study was to determine the preoperative and postoperative semen quality in patients undergoing ileal pouch-anal anastomosis. In addition, the study sought to determine the incidence of surgery-induced sexual dysfunction to evaluate the economic efficiency of semen cryopreservation as compared with alternatives such as microsurgical epididymal sperm aspiration. METHODS: Preoperative and postoperative semen analyses were offered to 97 patients with ileal pouch-anal anastomosis with benign colorectal diseases since 1989. The direct costs of the semen cryopreservation program were determined and compared with those of alternatives. RESULTS: In 34 of 40 consecutive patients with ileal pouch-anal anastomosis who made use of preoperative semen preservation, normal sperm concentrations, motility, and morphology were found. Mean semen characteristics of all 23 patients who returned for postoperative analysis were not different from preoperative values, but they were for total sperm number. Two patients developed temporary retrograde ejaculation postoperatively. None of the preserved semen samples was used, thus semen cryopreservation benefited none of these patients. The total costs of semen cryopreservation are between 2.2 and 5 times higher than the costs for one microsurgical epididymal sperm aspiration procedure. CONCLUSIONS: Preoperative semen cryopreservation in patients undergoing ileal pouch-anal anastomosis because of benign colorectal diseases is quite feasible. However, most likely because of improved surgical techniques and the increasing number of effective alternatives, preoperative semen cryopreservation in patients with ileal pouch-anal anastomosis is no longer cost effective.

Adult↗
PubMed2000

Laparoscopic-assisted vs. open ileocolic resection for Crohn's disease. A comparative study.

BACKGROUND: The objective of this study was to compare laparoscopic-assisted ileocolic resection for Crohn's disease of the distal ileum with open surgery in two consecutive groups of patients. METHODS: From 1995 until 1998, 48 patients underwent open ileocolic resection at the Academic Medical Center (AMC) in Amsterdam, while 30 patients had laparoscopic-assisted ileocolic resection at the Leiden University Medical Center (LUMC). Patient characteristics, perioperative course, and recovery were compared. Differences between the groups were tested using Student's t-test for independent groups and chi-square tests when appropriate. RESULTS: The open and the laparoscopic patient groups were comparable for age, gender, body mass index (BMI), prior abdominal surgery, and length of resected bowel. The conversion rate was 6.6%. Laparoscopic operating times (138+/-SD 36 min) were significantly longer than those observed in the open group (104+/-SD 34 min). Discharge was significantly earlier in the laparoscopic group than the open group (5.7 vs 10.2 postoperative days, p<0.007). Postoperative morbidity did not differ significantly between the patients treated traditionally (14.6%) and laparoscopically (10%). CONCLUSION: Compared to open surgery, laparoscopic ileocolic resection for Crohn's disease is associated with similar morbidity rates, a shorter hospital stay, and improved cosmetic results, justifying the laparoscopic approach as the procedure of choice.

Adult↗
PubMed2000

Laparoscopic-assisted vs open colectomy for severe acute colitis in patients with inflammatory bowel disease (IBD): a retrospective study in 42 patients.

BACKGROUND: Inflammatory bowel disease (IBD) can be complicated by severe acute colitis. Emergency colectomy is mandatory if patients do not respond to intensive medical therapy. A minimally invasive approach such as laparoscopic-assisted colectomy might be beneficial in these patients. Therefore, we set out to assess the feasibility and the safety of emergency laparoscopic-assisted colectomy in IBD patients with severe acute colitis. METHODS: A total of 42 consecutive patients underwent an emergency colectomy with end-ileostomy. Ten patients had laparoscopic-assisted colectomy, and 32 had open colectomy. Pre- and perioperative parameters, morbidity, and mortality were analyzed. RESULTS: The two groups were comparable for patient characteristics. There were no conversions in the laparoscopic group. The operation time was longer in the laparoscopic group than in the open group (271 vs 150 min; p < 0.001), but the hospital stay was shorter (14.6 vs 18.0 days; p = 0.05). Complications were similar for the two groups. CONCLUSION: Laparoscopic-assisted colectomy in IBD patients with severe acute colitis is feasible and as safe as open colectomy.

Acute Disease↗
PubMed2000

Quality of life after total colectomy with ileorectal anastomosis or proctocolectomy and ileal pouch-anal anastomosis for familial adenomatous polyposis.

BACKGROUND: Knowledge of postoperative health status is important in decision-making about the type of operation necessary in patients with familial adenomatous polyposis (FAP). This study compared the quality of life (QoL) between patients with an ileorectal anastomosis (group 1) and those with an ileal pouch-anal anastomosis (group 2). METHODS: QoL was assessed with both a generic questionnaire (Short Form-36 Health Survey; SF-36) and a disease-specific questionnaire (European Organization for Research and Treatment of Cancer Colorectal QoL Questionnaire; EORTC QLQ-CR38). The SF-36 consists of 36 items representing eight generic health domains, and the EORTC QLQ-CR38 comprises 38 items representing disease-specific health domains. Both questionnaires were distributed among 323 patients with FAP known at the Dutch Polyposis Registry who had previously undergone either operation. The results of the SF-36 were compared with the scores of age- and sex-matched respondents from the general population. RESULTS: Some 279 patients (86 per cent), 161 in group 1 and 118 in group 2, completed the questionnaire. Generic and disease-specific QoL was the same for groups 1 and 2. The SF-36 scores of both groups were significantly lower than those of the general population. CONCLUSION: There were no differences with respect to health status between patients in groups 1 and 2, and preference for either procedure cannot be based on QoL.

Adenomatous Polyposis Coli↗
PubMed1999

Enterohepatic cycling of bilirubin: a putative mechanism for pigment gallstone formation in ileal Crohn's disease.

BACKGROUND & AIMS: Patients with ileal disease, bypass, or resection are at increased risk for developing gallstones. In ileectomized rats, bilirubin secretion rates into bile are elevated, most likely caused by increased colonic bile salt levels, which solubilize unconjugated bilirubin, prevent calcium complexing, and promote its absorption and enterohepatic cycling. The hypothesis that ileal disease or resection engenders the same pathophysiology in humans was tested. METHODS: Sterile gallbladder bile samples were obtained intraoperatively from 29 patients with Crohn's disease and 19 patients with ulcerative colitis. Bilirubin, total calcium, biliary lipids, beta-glucuronidase activities, and cholesterol saturation indices in bile were measured, and markers of hemolysis and ineffective erythropoiesis in blood were assessed. RESULTS: Bilirubin conjugates, unconjugated bilirubin, and total calcium levels were increased 3-10-fold in bile of patients with ileal disease and/or resection compared with patients with Crohn's colitis or ulcerative colitis. Biliary bilirubin concentrations correlated positively with the anatomic length and duration of ileal disease. Endogenous biliary beta-glucuronidase activities were comparable in all groups, and both the hemogram and serum vitamin B12 levels were normal. CONCLUSIONS: This study establishes that increased bilirubin levels in bile of patients with Crohn's disease are caused by lack of functional ileum, supporting the hypothesis that enterohepatic cycling of bilirubin occurs.

Adult↗
PubMed1999

Concanavalin A-binding cholesterol crystallization inhibiting and promoting activity in bile from patients with Crohn's disease compared to patients with ulcerative colitis.

BACKGROUND/AIMS: Crohn's disease is a risk factor for gallstone formation. In contrast, patients with ulcerative colitis have an incidence of gallstone formation comparable to the general population. The reason for this difference is not known. The aim of this study was to elucidate the factors controlling cholesterol crystallization in gallbladder bile of Crohn's disease and ulcerative colitis patients. METHODS: Gallbladder bile was obtained by aspiration during bowel resections (26 Crohn's disease patients, 20 ulcerative colitis patients). Biliary lipid composition, crystal detection time and the effect of extraction of the concanavalin A-binding fraction on crystal formation were determined. RESULTS: Cholesterol crystals were present in seven of the 26 bile samples of Crohn's disease-patients and one of the 20 ulcerative colitis patients. Four of the bile samples of Crohn's disease patients were fast nucleating. None of the 20 ulcerative colitis patients had fast nucleating bile. Lipid composition, total lipid concentration and CSI were not significantly different between the two groups. In Crohn's disease patients extraction of concanavalin A-binding fraction decreased crystallization in 10 bile samples but accelerated crystallization in one bile sample. In eight bile samples from ulcerative colitis patients crystallization increased after concanavalin A-binding fraction extraction. CONCLUSIONS: Compared to ulcerative colitis patients, gallbladder bile of Crohn's disease patients showed increased cholesterol crystallization despite comparable lipid composition and cholesterol saturation index. This difference is caused by increased cholesterol crystallization-promoting activity. Bile from ulcerative colitis patients contains a Con A-binding factor which inhibits cholesterol crystallization.

Adult↗
PubMed1999

Functional outcome after colectomy and ileorectal anastomosis compared with proctocolectomy and ileal pouch-anal anastomosis in familial adenomatous polyposis.

OBJECTIVE: To compare the long-term functional results of ileorectal anastomosis (IRA) with those of ileal pouch-anal anastomosis (IPAA) in patients with familial adenomatous polyposis (FAP). SUMMARY BACKGROUND DATA: In patients with FAP, hundreds of colorectal adenomas develop, and the patient will die of colorectal cancer if left untreated. The surgeon must choose between colectomy with IRA and restorative proctocolectomy with IPAA. One factor crucial to decision making is the functional outcome after either procedure. To date, studies on this issue have reported conflicting results and have been based on small series of patients. METHODS: To assess various functional variables, a questionnaire was sent to 323 patients with FAP who underwent either IRA or IPAA and who were registered at the Netherlands Foundation for the Detection of Hereditary Tumors. The overall response rate was 86%; the responders comprised 161 patients who underwent IRA and 118 patients who underwent IPAA. RESULTS: Patients who underwent IRA scored significantly better for daytime and nighttime stool frequency, soiling, occasional passive incontinence, flatus and feces discrimination, stool consistency, and need for antidiarrheal medication. There was no difference with regard to perianal irritation, episodes of bowel discomfort, or dietary restrictions. The functional results according to the aggregate score of the Gastro-Intestinal Functional Outcome Scale, where the items specified above were integrated (0 indicating a poor and 100 a good overall function), were significantly better in patients with an IRA (74.5) than in patients with an IPAA (66.0) (p < 0.01). CONCLUSION: The functional outcome after IRA is significantly better than after IPAA. On the basis of these results, IRA might still be considered in patients with a mild phenotypic expression of the disease in the rectum.

Adenomatous Polyposis Coli↗
PubMed1997

Decision analysis in the management of duodenal adenomatosis in familial adenomatous polyposis.

BACKGROUND: Patients with familial adenomatous polyposis are not only at high risk of developing adenomas in the colorectum but a substantial number of patients also develop polyps in the duodenum. Because treatment of duodenal polyps is extremely difficult and it is unknown how many patients ultimately develop duodenal cancer, the value of surveillance of the upper digestive tract is uncertain. AIMS: (1) To assess the cumulative risk of duodenal cancer in a large series of polyposis patients. (2) To develop a decision model to establish whether surveillance would lead to increased life expectancy. METHODS: Risk analysis was performed in 155 Dutch polyposis families including 601 polyposis patients, and 142 Danish families including 376 patients. Observation time was from birth until date of last contact, death, diagnosis of duodenal cancer, or closing date of the study. RESULTS: Seven Dutch and five Danish patients developed duodenal cancer. The lifetime risk of developing this cancer by the age of 70 was 4% (95% confidence interval 1-7%) in the Dutch series and 3% (95% confidence interval 0-6%) in the Danish series. Decision analysis showed that surveillance led to an increase in life expectancy by seven months. CONCLUSIONS: Surveillance of the upper digestive tract led to a moderate gain in life expectancy. Future studies should evaluate whether this increase in life expectancy outweighs the morbidity of endoscopic examination and proximal pancreaticoduodenectomy.

Adenomatous Polyposis Coli↗
PubMed1996

Molecular genetic tests as a guide to surgical management of familial adenomatous polyposis.

BACKGROUND: In familial adenomatous polyposis the only curative treatment is colectomy, and the choice of operation lies between restorative proctocolectomy (RPC) and colectomy with ileorectal anastomosis (IRA). The RPC procedure carries a higher morbidity but, unlike IRA, removes the risk of subsequent rectal cancer. Since the course of familial adenomatous polyposis is influenced by the site of mutation in the polyposis gene, DNA analysis might be helpful in treatment decisions. METHODS: We evaluated the incidence of rectal cancer in polyposis patients who had undergone IRA, and examined whether the requirement for subsequent rectal excision because of cancer or uncontrollable polyps was related to the site of mutation. FINDINGS: Between 1956 and mid-1995, 225 patients registered at the Netherlands Polyposis Registry had undergone IRA. In 87 of them, a pathogenetic mutation was detected. 72 patients had a mutation located before codon 1250 and 15 patients after this codon. The cumulative risk of rectal cancer 20 years after surgery was 12%, and at that time 42% had undergone rectal excision. The risk of secondary surgery was higher in patients with mutations in the region after codon 1250 than in patients with mutations before this codon (relative risk 2.7, p < 0.05). INTERPRETATION: On this evidence, IRA should be the primary treatment for polyposis in patients with mutations before codon 1250, and RPC in those with mutations after this codon.

Adenomatous Polyposis Coli↗
PubMed1996

Severe complications of perianal sepsis in patients with human immunodeficiency virus.

Fifty human immunodeficiency virus (HIV)-infected patients with perianal sepsis were studied. Seven (14 per cent) had serious septic complications, four patients with severe necrotizing gangrene, and three with abscesses in the mediastinum, liver and brain respectively. CD4+ lymphocyte counts were significantly lower in patients with severe septic complications as compared with those with uncomplicated perianal sepsis (P < 0.05). In patients with HIV presenting with rare (metastatic) abscesses, perianal sepsis must always be kept in mind as a possible focus. Although HIV-infected patients have a limited life expectancy perianal fistulas and abscesses should be aggressively treated, because of the high risk of severe complications.

AIDS-Related Opportunistic Infections↗
PubMed1996

Correlation between early recurrence and reoperation after ileocolonic resection in Crohn's disease: a prospective study.

BACKGROUND: The medical and surgical treatment of patients with Crohn's disease is directed at reducing symptoms and postponing recurrence. In the determination of high-risk groups for surgical recurrence after ileocolonic resection, the role of early endoscopic evaluation is unclear. STUDY DESIGN: We investigated the relationship between early recurrence detected endoscopically and recurrence detected by operation in a prospective study of 60 patients, who underwent ileocolonic resection for Crohn's disease. RESULTS: Recurrence detected endoscopically was found in 44 patients (73 percent) according to definition I (presence of any lesion detected endoscopically that was compatible with Crohn's disease) and in 21 patients (35 percent) according to definition II (five or more aphthous lesions present in the neoterminal ileum or at the anastomotic site, or 25 percent or more of the intestinal circumference inflamed). Recurrence detected surgically was found in 14 patients (23 percent). No correlation between early recurrence detected endoscopically and recurrence detected surgically was evident. CONCLUSIONS: Early recurrence detected endoscopically did not predict recurrence detected surgically.

Adolescent↗
PubMed1995

Local excision and mucosal advancement for anorectal ulceration in patients infected with human immunodeficiency virus.

In patients infected with human immunodeficiency virus (HIV) no effective surgical procedure has been described for anorectal ulceration that is resistant to medical therapy. This study was designed to determine the effectiveness of surgical excision of anorectal ulcers, with or without mucosal advancement. The medical records of patients with HIV and anorectal pathology diagnosed between 1984 and 1994 were reviewed. Patients with anorectal ulcers were divided into group A which was treated only with excision and group B in which excision was combined with mucosal advancement. Surgical treatment was considered successful if relief of symptoms was achieved within 4 weeks of the operation. Excision of anorectal ulcers was successful in seven of 16 patients (44 per cent) in group A. Relief of symptoms was achieved in 12 of 13 patients (92 per cent) in group B when surgical excision was combined with mucosal advancement, which is significantly better than the results in group A (P = 0.02). This non-randomized study indicates that after unsuccessful medical treatment persistent symptomatic ulcers should be treated operatively by excision with mucosal advancement.

AIDS-Related Opportunistic Infections↗