S Post

Universität Heidelberg, Heidelburg, Baden-Württemberg, Germany

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Publications (326)772.18 Total impact

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    ABSTRACT: Background:Association studies have implicated the glycosaminoglycan hyaluronan (hyaluronic acid, HA) and its degrading enzymes the hyaluronidases in tumour progression and metastasis. Oligosaccharides of degraded HA have been ascribed a number of biological functions that are not exerted by high-molecular-weight HA (HMW-HA). However, whether these small HA oligosaccharides (sHA) have a role in tumour progression currently remains uncertain due to an inability to analyse their concentration in tumours.Methods:We report a novel method to determine the concentration of sHA ranging from 6 to 25 disaccharides in tumour interstitial fluid (TIF). Levels of sHA were measured in TIF from experimental rat tumours and human colorectal tumours.Results:While the majority of HA in TIF is HMW-HA, concentrations of sHA up to 6 μg ml(-1) were detected in a subset of tumours, but not in interstitial fluid from healthy tissues. In a cohort of 72 colorectal cancer patients we found that increased sHA concentrations in TIF are associated with lymphatic vessel invasion by tumour cells and the formation of lymph node metastasis.Conclusions:These data document for the first time the pathophysiological concentration of sHA in tumours, and provide evidence of a role for sHA in tumour progression.British Journal of Cancer advance online publication, 17 June 2014; doi:10.1038/bjc.2014.332 www.bjcancer.com.
    British journal of cancer. 06/2014;
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    ABSTRACT: After bariatric surgery, the postoperative quality of weight loss is variable. The aim of weight loss treatment is to reduce fat mass while keeping fat free mass, in particular body cell mass (BCM), constant. Detection of low BCM is an important aspect of surgical follow up. Handgrip dynamometry is a rapid and inexpensive test to measure static muscle strength, which is an independent outcome indicator of various medical conditions. The objective of this study is to examine the change in handgrip strength after bariatric surgery and its predictive value for postoperative body composition. Furthermore, this study was carried out at the University Hospital, Germany.
    Obesity surgery. 06/2014;
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    ABSTRACT: Complications after cholecystectomy are continuously documented in a nationwide database in Germany. Recent studies demonstrated a lack of reliability of these data. The aim of the study was to evaluate the impact of a control algorithm on documentation quality and the use of routine diagnosis coding as an additional validation instrument. Completeness and correctness of the documentation of complications after cholecystectomy was compared over a time interval of 12 months before and after implementation of an algorithm for faster and more accurate documentation. Furthermore, the coding of all diagnoses was screened to identify intraoperative and postoperative complications. The sensitivity of the documentation for complications improved from 46 % to 70 % (p = 0.05, specificity 98 % in both time intervals). A prolonged time interval of more than 6 weeks between patient discharge and documentation was associated with inferior data quality (incorrect documentation in 1.5 % versus 15 %, p < 0.05). The rate of case documentation within the 6 weeks after hospital discharge was clearly improved after implementation of the control algorithm. Sensitivity and specificity of screening for complications by evaluating routine diagnoses coding were 70 % and 85 %, respectively. The quality of documentation was improved by implementation of a simple memory algorithm.
    Der Chirurg 02/2014; · 0.52 Impact Factor
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    ABSTRACT: : Intraductal tubulopapillary neoplasms of the pancreas are very rare tumors characterized by intraductal tubulopapillary growth, ductal differentiation, scant intracellular mucin production and cellular dysplasia. Here, we report the first case of an intraductal tubulopapillary neoplasm of the pancreas with clear cell morphology. The tumor was detected during the diagnostic work-up of acute pancreatitis in a 43- year old female. Histological examination revealed a tumor with the typical architecture of an intraductal tubulopapillary neoplasm of the pancreas with tumor cells showing abundant clear cytoplasm and Di-PAS negativity. Immunohistochemistry revealed positivity for Pan-CK, CK7, CK8/18, MUC1, MUC6, carbonic anhydrase IX, CD10, EMA, beta-catenin and e-cadherin. Sanger sequencing did not detect mutations for beta-catenin, BRAF, KRAS, PIK3CA and GNAS. Altogether, histology, immunohistochemical expression profile (MUC1+, MUC6+, MUC2-, MUC5AC-, thrypsin-, chymotrypsin-, CDX2-) and sequencing results led to the diagnosis of intraductal tubulopapillary neoplasm. However, the neoplasm consisted of cells showing abundant clear cytoplasm, a morphological pattern not being described so far in the current classification of pancreatic intraductal neoplasms. Potential differential diagnosis and the molecular basis of clear cell morphology are discussed. In conclusion, we consider this tumor as intraductal tubulopapillary neoplasm of the pancreas with unique clear cell phenotype. After surgery and without adjuvant therapy, the patient's clinical course has been uneventful for over two years now.Virtual slides: The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1051828790117127.
    Diagnostic Pathology 01/2014; 9(1):11. · 1.85 Impact Factor
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    ABSTRACT: Early colorectal cancer is increasingly treated by endoscopic removal. In cases of incomplete resection or high-risk carcinoma, additional surgery is necessary. To evaluate the frequency of subsequent oncologic surgery after endoscopic resection of colorectal cancer, the rate of lymph node metastasis, residual cancer, and morbidity and mortality rates of the operation. Any eventual adverse effect of the prior endoscopic therapy on the surgical and oncologic outcome was assessed. Retrospective review of prospectively collected data. University hospital. Sixty-six consecutive patients with incomplete endoscopic treatment and need for additional surgery between 2004 and 2011. The data of these patients were compared with those of a group of patients with surgery for early colorectal cancer during the same period without prior endoscopic resection as the control group. Rate of lymph node metastasis and residual cancer, perioperative morbidity and mortality. The lymph node metastasis rate after oncologic resection was 8.6%, and the residual cancer rate was 41%. Risk factors for residual cancer were macroscopic incomplete resection (P < .0001), positive resection margins (P = .03), and piecemeal resection (P = .004). No mortality was observed. Perioperative morbidity, mortality, and oncologic outcome were not significantly different in the group with prior endoscopic resection compared with the primarily operated group. Retrospective study. Endoscopic treatment of malignant polyps does not worsen surgical and oncologic outcomes in cases of subsequent surgery. Because mortality and morbidity are low, oncologic resection generally should be done in the presence of risk factors for residual cancer.
    Gastrointestinal endoscopy 01/2014; · 6.71 Impact Factor
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    ABSTRACT: Purpose The purpose of this study is two-fold. First, to evaluate, whether functional rectal MRI techniques can be analyzed in a reproducible manner by different readers and second, to assess whether different clinical and pathologic T and N stages can be differentiated by functional MRI measurements. Material and Methods 54 patients (38 men, 16 female; mean age 63.2 ± 12.2 years) with pathologically proven rectal cancer were included in this retrospective IRB-approved study. All patients were referred for a multi-parametric MRI protocol on a 3 Tesla MR-system, consisting of a high-resolution, axial T2 TSE sequence, DWI and perfusion imaging (plasma flow - PFTumor) prior to any treatment. Two experienced radiologists evaluated the MRI measurements, blinded to clinical data and outcome. Inter-reader correlation and the association of functional MRI parameters with c- and p-staging were analyzed. Results The inter-reader correlation for lymph node (ρ 0.76-0.94; p < 0.0002) and primary tumor (ρ 0.78- 0.92; p < 0.0001) apparent diffusion coefficient and plasma flow (PF) values was good to very good. PFTumor values decreased with cT stage with significant differences identified between cT2 and cT3 tumors (229 versus 107.6 ml/100 ml/min; p = 0.05). ADCTumor values did not differ significantly. No substantial discrepancies in lymph node ADCLn values or short axis diameter were found among cN1-3 stages, whereas PFLn values were distinct between cN1 versus cN2 stages (p = 0.03). In the patients without neoadjuvant RCT no statistically significant differences in the assessed functional parameters on the basis of pathologic stage were found. Conclusion This study illustrates that ADC as well as MR perfusion values can be analyzed with good interobserver agreement in patients with rectal cancer. Moreover, MR perfusion parameters may allow accurate differentiation of tumor stages. Both findings suggest that functional MRI parameters may help to discriminate T and N stages for clinical decision making.
    European journal of radiology 01/2014; · 2.65 Impact Factor
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    ABSTRACT: While the influence on survival is only seen in patients with complete regression after neoadjuvant treatment in locally advanced rectal cancer the impairment of the continence capacity weighs even more for patients with little oncological benefit. Patients treated with intensified preoperative radiochemotherapy patients treated only by TME surgery were asked five years after treatment to complete the Wexner and SF-12 quality of life questionnaire. 25 after neoadjuvant treatment had a median Wexner score of 14 [3-20] after 63 [42-78] months. Histopathological stage or grade of regression did not influence the Wexner score (p = 0.76, resp. p = 0.9). 12% describe themselves as being permanently continent; 40% are stool incontinent "always" or "most of the time". 68% are always wearing pads. 29 patients after TME only showed a median Wexner score of 5 [range 0-17] after 66 months [26-133]. SF-12 showed significantly lower values in physical (p = 0.02) as well as mental summary scales (p = 0.015) in patients after RCTX while patients after radical surgery showed no difference to the norm population. This study shows that continence is significantly worse five years after neoadjuvant treatment. Moreover, patients after neoadjuvant treatment and surgery have impaired quality of life compared to norm population. These results may contribute to the discussion of only applying neoadjuvant chemoradiation selectively in patients with advanced rectal cancer.
    European journal of surgical oncology: the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 12/2013; · 2.56 Impact Factor
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    ABSTRACT: A parastomal hernia is defined as an incisional hernia related to a stoma and belongs to the most common stoma-related complications. Many factors concerning the operative technique which are considered to influence the incidence of parastomal herniation have been investigated. However, it remains unclear whether the enterostomy should be placed through or lateral to the rectus abdominis muscle in order to prevent parastomal herniation and other important stoma complications for people undergoing abdominal wall enterostomy. To assess if there is a difference regarding the incidence of parastomal herniation and other stomal complications, such as ileus and stenosis, in lateral pararectal versus transrectal stoma placement in people undergoing elective or emergency abdominal wall enterostomy. In October and November 2012 we searched for all types of published and unpublished randomized and non-randomized studies with no restriction on language, date or country (search dates in brackets). We searched the bibliographic databases The Cochrane Library (4 October 2012), MEDLINE (1 October 2012), EMBASE (10 October 2012), LILACS (29 November 2012), and Science Citation Index Expanded (4 October 2012). We also searched the reference lists of all relevant studies and the trial registers ClinicalTrials.gov (9 October 2012), World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP) Search Portal (10 October 2012), as well as three additional trial registers not included in the ICTRP (27 November 2012). Randomized and non-randomized studies comparing lateral pararectal versus transrectal stoma placement with regard to parastomal herniation and other stoma-related complications. Two authors independently assessed study quality and extracted data. Data analyses were conducted according to the recommendations of The Cochrane Collaboration and the Cochrane Colorectal Cancer Group (CCCG). Quality of evidence was rated according to GRADE (Grading of Recommendations Assessment, Development and Evaluation). Nine retrospective cohort studies with a total of 761 participants met the inclusion criteria. All included studies reported results for the primary outcome (parastomal herniation), and one study also reported data on one of the secondary outcomes (stomal prolapse). None of the included studies compared the two interventions with regard to other secondary outcomes.There was neither a significant difference in terms of the risk for parastomal herniation (risk ratio (RR) 1.29; 95% confidence interval (CI) 0.79 to 2.1) nor with regard to the occurrence of stomal prolapse (RR 1.23; 95% CI 0.39 to 3.85). An I² value of 65% indicated substantial statistical heterogeneity in the meta-analysis. The poor quality of the included evidence does not allow a robust conclusion regarding the objectives of the review. This review highlights a clear uncertainty as to the relative merits of either approach. There is a need for randomized trials to evaluate the effectiveness of the lateral pararectal versus the transrectal approach in preventing parastomal herniation and other stoma-related morbidity in people requiring enterostomy placement.
    Cochrane database of systematic reviews (Online) 11/2013; 11:CD009487. · 5.70 Impact Factor
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    ABSTRACT: Long-term survival after resection for pancreas carcinoma has rarely been reported. Factors influencing long-term survival are still under debate. The aim of this study was to define predictors for long-term survival. Between 1972 and 2004, a total of 415 patients underwent resection. Data were collected in a prospective data base. Data of 360 patients were available for further analysis in 2011. All specimens of long-term survivors were histologically reviewed. Long-term survivors (n = 69) had a median survival of 91 months. Pathological re-evaluation of all specimens re-confirmed the diagnosis. Predictive factors for long-term survival in univariate analysis were no preoperative biliary stent, low CA 19-9 level, lack of blood transfusion, R0 resection, tumour diameter, and -grading, absence of lymph node or distant metastases, lymphangiosis, and perineural infiltration. Adjuvant chemotherapy showed a significant influence on overall survival but not on long-term survival. In multivariate analysis, lymph node ratio and volume of blood transfusion were predictors of long-term survival. Nearly 20 % of patients with pancreas carcinoma who undergo surgical resection have a chance of long-term survival. Survival beyond 5 years is predicted by clinical and tumour-specific factors. Adjuvant chemotherapy might prolong overall survival but is, according to these results, unable to contribute to long-term survival. There is still a risk of recurrence after a 5- or even a 12-year mark. Survival beyond 5 or even 12 years, therefore, does not assure cure.
    Journal of Gastrointestinal Surgery 11/2013; · 2.36 Impact Factor
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    ABSTRACT: To evaluate the success and complication rates of endoscopic mucosal resections (EMR) for large flat adenomas and to identify risk factors for adenoma recurrence. We evaluated all consecutive patients treated with EMR at our institution between 2003 and 2005 that fulfilled the following criteria: >10-mm diameter, Paris 0-Is and 0-IIa-c, and endoscopic follow-up. We conducted univariate analysis and multivariate analysis using a non-stratified logistic regression model to identify possible influencing factors. In a median follow-up period of 6 years, we analyzed 177 EMR procedures, with a mean size of 21 mm. The majority of the resections were in the right colon. Recurrence occurred in 29 patients. Further treatment of patients with recurrence was endoscopic in 27 patients, whereas 1 patient was treated with transanal endoscopic microsurgery and one underwent surgery. The variables influencing the multivariate model were resection technique, immediate complication age, and histology. We show that EMR can achieve a long-term clearance of large flat adenomas. A recurrence after EMR does not equal to failed therapy. The possibility of recurrence has to be considered in the clinical implementation of EMR. An important part of the stratifying factors for follow-up is the procedural assessment of the effectiveness of the resection and the resection technique.
    International Journal of Colorectal Disease 10/2013; · 2.24 Impact Factor
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    ABSTRACT: This study aimed to evaluate the influence of conversion on perioperative and short- and long-term oncologic outcomes in laparoscopic resection for rectal cancer and to compare these with those for an open control group. The data of 276 consecutive patients who underwent surgery for rectal cancer between 2006 and 2010 at a single institution were prospectively collected. Of the 276 patients, 114 underwent primarily open surgery, and 162 underwent laparoscopic surgery (on an intention-to-treat basis). Of the 162 laparoscopic patients, 38 (23.5 %) underwent conversion to open surgery. The three groups of patients were compared: the conversion surgery group, the open surgery group, and the completed laparoscopy surgery group. The converted patients had more wound infections (18.4 vs 4.8 %, p = 0.009), but the wound infection rate in the primarily open group also was significantly higher than in the laparoscopic resection group (p = 0.007). No further differences in perioperative morbidity, including anastomotic leakage, were found. The perioperative 30-day mortality rate was comparable between all the groups (0.6 vs 2.6 vs 2.6 %, nonsignificant difference). The oncologic parameters such as number of harvested lymph nodes and rate of R0 resection were equal in all the groups. The completed laparoscopy group had a shorter hospital stay [12 vs 16 days in the primarily open group (p = 0.02) vs 15 days in the converted group (p = 0.03)]. The rates for survival, local recurrence (4.5 vs 3 vs 3 %), and metachronous metastasis (10.1 vs 9.3 vs 9 %) did not differ significantly between the three groups after a period of 3 years. Conversion to open surgery in laparoscopic rectal resection has no negative effect on perioperative or long-term oncologic outcome.
    Surgical Endoscopy 08/2013; · 3.43 Impact Factor
  • Zentralblatt für Chirurgie 07/2013; · 0.69 Impact Factor
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    ABSTRACT: Abstract Objective. To describe the experience of a single center regarding the feasibility of endoscopic closure of iatrogenic colonic perforations and to elucidate differences between the efficacy of endoscopic clip closure due to diagnostic or therapeutic colonoscopy. Material and methods. A retrospective institutional computer-based search of records of colonoscopic perforation occurring between January 2004 and December 2011 was undertaken. Data on patients undergoing colonoscopy were entered into a clinical database. To further improve the detection of all cases of colon perforations, the authors also searched their separate surgical database for every patient with a colon perforation treated or operated on in the surgery department. Statistical significance was tested using either Fortran-Subroutine Fytest, chi-square testing or t-test. Results. Over 8 years, 22,924 patients underwent colonoscopy, of which 105 consecutive patients suffered iatrogenic perforation. Clip application was possible in 62 patients (81.58%) after perforation due to a therapeutic colonoscopy, whereas clip application was only possible in 9 patients (31.03%) after perforation due to a diagnostic colonoscopy. 4 out of 9 patients (44.44%) in the diagnostic group compared with 7 out of 62 patients (11.29%) after clipping a perforation during a therapeutic colonoscopy were sent to surgery. Conclusions. The authors' data indicate significant differences in the potential for and success of endoscopic closure of iatrogenic perforations occurring during diagnostic or therapeutic colonoscopy. The frequency of surgery was significantly greater after clipping a perforation during a diagnostic colonoscopy.
    Scandinavian journal of gastroenterology 05/2013; · 2.08 Impact Factor
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    ABSTRACT: BACKGROUND: Experimental studies and small anecdotal reports have documented the potential and feasibility of transgastric appendicectomy. This paper reports the results of the new technique in a selected group of patients. METHODS: From April 2010 transgastric appendicectomy was offered to all patients with acute appendicitis, but without generalized peritonitis or local contraindications. RESULTS: Of 111 eligible patients 15 agreed to undergo the transgastric operation. After conversion of the first case to laparoscopy because of severe inflammation and adhesions, the following 14 consecutive transgastric procedures were completed. Two patients with initial peritonitis required laparoscopic lavage 4 days after transgastric appendicectomy, but no leaks were detected at the appendiceal stump or stomach. CONCLUSION: These preliminary results have shown the feasibility of this innovative procedure. Additional studies, however, are required to demonstrate the specific advantages and disadvantages of this approach, and define its role in clinical surgery.
    British Journal of Surgery 04/2013; · 4.84 Impact Factor
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    ABSTRACT: PURPOSE: Limits for sphincter preservation in rectal cancer have been expanded under the assumption that patients with a permanent colostomy have worse quality of life (QoL). Incontinence and painful defecation are common problems; therefore, this study compares functional outcome and QoL after sphincter-sparing intersphincteric resection (ISR), low anterior resection (LAR), and abdominoperineal resection (APR) for rectal cancer. METHODS: From a prospective database, three matched groups of patients after surgery for rectal cancer between 1999 and 2009 were extracted. Median follow-up was 59 months. Of 131 patients receiving a questionnaire, 95 % could be analyzed further. Generic and disease-specific validated QoL (European Organization for Research and Treatment in Cancer QLQ-C30, CR38) and Wexner incontinence score were used. RESULTS: Global QoL was comparable between the groups. Physical functioning was significantly better after sphincter preservation surgery than APR (p < 0.05). Symptom scores for diarrhea (DIA) and constipation (CON) were higher after sphincter-preserving surgery (ISR: DIA 45.4, CON 20.2; LAR: DIA 34.1, CON 25.2) compared to APR (DIA 16.6, CON 12.0) (p < 0.05 and <0.01, respectively). Disease-specific QoL assessment showed significantly worse QoL regarding to male sexual function after APR (80.8) than after ISR (53.6) (p < 0.005). Regarding defecation, the ISR group showed significantly higher symptom scores than patients after LAR (p < 0.05). Wexner scores were significantly higher after ISR (12.9) than after LAR (9.5) (p < 0.005).
    International Journal of Colorectal Disease 04/2013; · 2.24 Impact Factor
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    ABSTRACT: OBJECTIVE:: To investigate different subtypes of intraductal papillary mucinous neoplasms (IPMNs) of the pancreas and their prognostic value. BACKGROUND:: IPMNs of the pancreas are estimated to have a better prognosis than pancreatic ductal adenocarcinomas (PDACs). In addition to the different growth types (ie, main duct vs. branch duct types), the histological subtypes of IPMNs (ie, intestinal, pancreatobiliary, gastric, and oncocytic type) are prognostically relevant. These subtypes can be characterized by different mucin (MUC) expression patterns. In this study, we analyzed the IPMNs from 2 pancreatic cancer referral centers by correlating the MUC expression, histological subtype, and clinical outcome. METHODS:: We re-evaluated all resections due to a pancreatic tumor over a period of 15 years. Cases with IPMNs were identified, and the subtypes were distinguished using histopathological analysis, including the immunohistochemical analysis of MUC (ie, MUC1, MUC2, and MUC5AC) expression. Furthermore, we determined clinical characteristics and patient outcome. RESULTS:: A total of 103 IPMNs were identified. On the basis of the MUC profile, histopathological subtypes were classified into the following categories: intestinal type [n = 45 (44%)], pancreatobiliary type [n = 41 (40%)], gastric type [n = 13 (12%)], and oncocytic type [n = 4 (4%)]. The following types of resections were performed: pancreatic head resections [n = 77 (75%)], tail resections [n = 16 (15%)], total pancreatectomies [n = 5 (5%)], and segment resections [n = 5 (5%)]. The 5-year survival of patients with intestinal IPMNs was significantly better than pancreatobiliary IPMNs (86.6% vs. 35.6%; P < 0.001). The pancreatobiliary subtype was strongly associated with malignancy [odds ratio (OR): 6.76], recurrence (P < 0.001), and long-term survival comparable with that of PDAC patients. CONCLUSIONS:: Evaluation of IPMN subtypes supports postoperative patient prognosis prediction. Therefore, subtype differentiation could lead to improvements in clinical management. Potentially identifying subgroups with the need for adjuvant therapy may be possible.
    Annals of surgery 03/2013; · 7.90 Impact Factor
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    ABSTRACT: PURPOSE: There is ample evidence of the benefits of clinical pathways (CPs), but this study is the first to investigate the potential additional benefits of a CP for rectal resections in a setting with an already established policy of enhanced postoperative recovery. METHODS: We compared 36 patients who underwent rectal resections with ileostomy placement and were treated according to a CP (CP group) with 67 patients treated before CP implementation (prepathway group). Indicators of process quality were placement of central venous line and epidural catheter, day of removal of Foley catheter in relation to removal of the epidural catheter, day of first mobilization, day of resumption of regular diet, day of first passage of stool through the stoma, and length of stay. Outcome quality was assessed by morbidity, mortality, reoperation, and readmission rates. RESULTS: We found that patients in the CP group resumed regular diet significantly sooner (p = 0.001). There were no significant differences regarding the day of first mobilization (p = 0.69), epidural catheter (p = 0.74), central venous line placement (p = 0.92), and removal of Foley catheter (p = 0.23). The first stool was passed through the stoma earlier (p = 0.04) in the prepathway group. Median length of hospital stay was significantly shorter in the CP group (12.5 vs. 15.0 days; p = 0.008). There were no significant changes in outcome quality, except for a significantly higher need for revisional surgery in the CP group (13.9 vs. 3 %, p = 0.05). CONCLUSIONS: After implementation of a CP for rectal resections, one parameter of process quality improved and length of stay decreased.
    International Journal of Colorectal Disease 02/2013; · 2.24 Impact Factor
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    ABSTRACT: BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is characterized by its poor prognosis, and some benign conditions and syndromes, including chronic pancreatitis (CP), are risk factors for pancreatic carcinoma. However, the differential diagnosis of CP from PDAC is difficult for clinicians because PDAC frequently causes inflammation within the pancreas. Therefore, patients with CP exhibit not only an elevated risk of cancer, but they are also in danger of underdiagnosis. METHODS: The present study retrospectively analyzed 29 patients with pancreatic cancer who fulfilled our definition of "chronic pancreatitis" to identify characteristics to aid in the differential diagnosis between chronic pancreatitis with and without pancreatic cancer. All parameters were subjected to univariate analysis. RESULTS: We identified several factors that differed significantly between the CP patients and patients with CP and synchronous PDAC, and these characteristics were used to develop a diagnostic algorithm. The performance of the algorithm was externally validated in a different panel of patients from the Department of Surgery, Medical Faculty Mannheim. CONCLUSION: The present study succeeded in identifying characteristics that significantly differed in patients with and without PDAC in CP. These characteristics were integrated in a diagnostic algorithm that might help to improve diagnostic of PDAC in CP.
    Pancreatology 01/2013; 13(3):243-249. · 2.04 Impact Factor
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    ABSTRACT: Background: Different approaches to study liver regeneration in murine models have been proposed. We investigated the effect of different liver resection models on liver damage and regeneration parameters in mice. Methods: We compared the technical aspect of the 2 most commonly used techniques of 50% and 70% liver resection. Liver damage, as determined by the change in serum alanine aminotransferase and aspartate aminotransferase, as well as the regeneration parameters VEGF and FGF-2 were analyzed at 6 time points. A postoperative vitality score was introduced. Results: Cholestasis was not observed for either technique. Both resection techniques resulted in full weight recovery of the liver after 240 hours, with no significant difference between sham and resection groups. Postoperative animal morbidity and total protein levels did not differ significantly for either method, indicating early and full functional recovery. However, comparing the mitogenic growth factors FGF-2 and VEGF, a significant increase in serum levels and, therefore, increased growth stimulus, was shown in the extended resection group. Conclusion: Extended resection led to a greater response in growth factor expression. This finding is important since it shows that growth factor response differs acdording to the extent of resection. We have demonstrated the need to standardize murine hepatic resection models to adequately compare the resulting liver damage.
    Canadian journal of surgery. Journal canadien de chirurgie 10/2012; 55(5):007911-411. · 1.63 Impact Factor

Publication Stats

5k Citations
772.18 Total Impact Points

Institutions

  • 1990–2014
    • Universität Heidelberg
      • • Department of Spine Surgery
      • • Surgical Hospital
      • • Faculty of Medicine Mannheim and Clinic Mannheim
      • • II. Medical Clinic
      • • Institute of Clinical Radiology
      • • Department of Transplantation Immunology
      Heidelburg, Baden-Württemberg, Germany
  • 2000–2013
    • Universität Mannheim
      Mannheim, Baden-Württemberg, Germany
    • Gesellschaft für wissenschaftliche Datenverarbeitung mbH Göttingen
      Göttingen, Lower Saxony, Germany
    • Universität Regensburg
      • Lehrstuhl für Chirurgie
      Regensburg, Bavaria, Germany
  • 2010–2011
    • Hospital Frankfurt Hoechst
      Frankfurt, Hesse, Germany
  • 2009–2010
    • Universitätsmedizin Mannheim
      Mannheim, Baden-Württemberg, Germany
  • 2008
    • Zentrum für Strahlentherapie und Radioonkologie
      Bremen, Bremen, Germany
  • 2006
    • St. Marienkrankenhaus
      Frankfurt, Hesse, Germany
  • 2004
    • National University of Rwanda
      Astrida, Southern Province, Rwanda
  • 2001
    • Universität des Saarlandes
      • Institut für Klinisch-Experimentelle Chirurgie
      Saarbrücken, Saarland, Germany
  • 1996–2001
    • Universitätsmedizin Göttingen
      • Department of General, Visceral and Child Surgery
      Göttingen, Lower Saxony, Germany
  • 1996–2000
    • Georg-August-Universität Göttingen
      Göttingen, Lower Saxony, Germany
  • 1993–1996
    • Ludwig-Maximilian-University of Munich
      München, Bavaria, Germany
  • 1994
    • Institut für klinische Forschung und Entwicklung
      Mayence, Rheinland-Pfalz, Germany
  • 1991
    • Alfried Krupp Krankenhaus
      Essen, Lower Saxony, Germany