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Biomedical subjects

H J Schlitt

Publications and source records attributed to H J Schlitt.

At least 19 recordsLinked to original sources

Survival benefit in patients after palliative resection vs non-resection colon cancer surgery.

AIM: To evaluate survival in patients undergoing palliative resection versus non-resection surgery for primary colorectal cancer in a retrospective analysis. METHODS: Demographics, TNM status, operating details and survival were reviewed for 67 patients undergoing surgery for incurable colorectal cancer. Palliative resection of the primary tumor was performed in 46 cases in contrast to 21 patients with non-resection of the primary tumor and bypass surgery. Risk factors for postoperative mortality and poor survival were analyzed with univariate and multivariate analyses. RESULTS: The two groups were comparable in terms of age, gender, preoperative presence of ileus and tumor stage. Multivariate analysis showed that median survival was significantly higher in patients with palliative resection surgery (544 vs 233 d). Differentiation of the tumor and tumor size were additional independent factors that were associated with a significantly poorer survival rate. CONCLUSION: Palliative resection surgery for primary colorectal cancer is associated with a higher median survival rate. Also, the presence of liver metastasis and tumor size are associated with poor survival. Therefore, resection of the primary tumor should be considered in patients with non-curable colon cancer.

Adult↗

[Prevention of organ failure in an organ donor. Early identification and maximum protective therapy after multiple trauma].

ANAMNESIS: A 18-year-old woman suffered from severe multi-trauma in combination with acute brain injury (Glasgow Coma Scale Score = 4) after road accident. After prolonged rescue measures and emergency stabilisation the patient was transferred by helicopter to the emergency department of our clinic. INVESTIGATIONS: Cranial computer tomography showed a severe general cerebral edema and a marked reduction in cerebral perfusion. Additionally, blunt abdominal injury, severe chest injury and multiple fractures were seen. Due to the severe and diffuse brain injury, a neurosurgical intervention was not possible. The patient was transferred to the intensive care unit. THERAPY AND COURSE: Intensive supportive therapy was started (artificial ventilation, massive transfusion, volume replacement, insertion of a chest tube, renal replacement therapy). Control cerebral computer tomography indicated a complete destruction of the cerebral parenchyma and infarction. Sedation was stopped. After 48-hours of intensive care therapy brain death was stated and the approval for organ donation was given by the next of kin. Heart and kidneys were explanted and transplanted successfully. CONCLUSION: Even under conditions of limited organ functions early identification and maximal supportive therapy may help to supply organ donation. Under certain condition, multiorgan failure may be reversible in possible organ donors.

Accidents, Traffic↗

Crohn's disease activity index and Vienna classification--is it worthwhile to calculate before surgery?

BACKGROUND: Crohn's disease (CD) patients with increased disease activity may reveal an increased risk for perioperative complications. The "Crohn's disease activity index" (CDAI) and the "Vienna classification" (VC) were developed for standardized disease activity estimations. The significance of these scores to predict extent, type and early outcome of surgery in CD patients was analyzed. METHODS: In 179 surgically treated CD patients, the CDAI and VC were assessed from a prospective database. Relations of the scores with CD risk factors, type, number, location and complications of surgery were analyzed. RESULTS: VC behavior and location subtypes were associated with distinct types of surgery (i.e. "strictureplasty" in "stricturing disease", "colon surgery" in "colon involvement"), but not with surgery type and extent or outcome. Surgery extent (i.e. with 5 vs. 3 "surgical sites" 425 +/- 25 vs. 223.3 +/- 25) and complications (357.1 +/- 36.9 (with) vs. 244.4 +/- 13 (without)) were associated with elevated CDAI levels; however, nicotine abuse remained the only significant risk factor for perioperative complications after multiple logistic regression. CONCLUSION: The significance of VC or CDAI for predicting the extent of surgery or complications is limited. None of the tested variables except preoperative nicotine abuse influenced the likelihood for perioperative complications.

Adolescent↗

Mini-incision for strictly retroperitoneal nephrectomy in living kidney donation vs flank incision.

BACKGROUND: Mini-incision donor nephrectomies (MIDNs) were established during the last decade, as an alternative to traditional open donor nephrectomy (ODN) via flank incision. In this study, we investigated intra-operative and post-operative data on outcome following MIDN in comparison with ODN data. METHODS: Data of 70 living kidney donations, performed at the University of Regensburg Medical Center since 1996, were evaluated. Donor operation was performed as either strictly retroperitoneal MIDN (n = 34) or as traditional ODN (n = 36) via flank incision. Total operation time, warm ischaemia time (WIT), perioperative pain-medication usage and creatinine levels as well as length of hospital stay, return to complete enteral nutrition and regular digestion were evaluated retrospectively. RESULTS: Total operation times were similar in MIDN, n = 34 (132 +/- 26 min) and in ODN, n = 36 (140 +/- 37 min) (P = 0.424). WIT was also similar in both: MIDN (0.9 +/- 0.4 min) and ODN (0.9 +/- 0.4 min) (P = 0.568). The requirement for post-operative opioids in morphine equivalent doses was significantly lower in MIDN (8.4 +/- 16 mg) compared with ODN (44 +/- 57 mg) (P = 0.001). Additional application of non-opioids (metamizole) (MIDN: 4.8 +/- 6.3 g, ODN: 3.4 +/- 3.9 g) and non-steroidal antirheumatic (NSAR) (diclofenac) (MIDN: 322 +/- 361 mg, ODN: 247 +/- 474 mg) revealed no significant differences between the groups. The hospital stay was 4.9 +/- 1.4 days in MIDN which was significantly shorter than that in ODN (9.3 +/- 3.3 days) (P = 0.001). Patients achieved fully independent mobility earlier in MIDN than in ODN (P = 0.934). Start of enteral nutrition with fluids was significantly quicker in MIDN (1.9 +/- 7 h) compared with ODN (12 +/- 13 h) (P = 0.05). Full enteral nutrition was accomplished significantly earlier in MIDN (1.6 +/- 0.8 days) (P = 0.023). Return to normal digestion revealed no significant differences between groups. Serum creatinine levels of all kidney donors were in the normal range (66 +/- 18 micromol/l) one day before nephrectomy, increased on day 1 after surgery (119 micromol/l +/- 31 micromol/l) and were stable on day 3 (115 micromol/l +/- 30 micromol/l) without significant differences. CONCLUSION: Strictly, retroperitoneal MIDN in living kidney donation is a fast and safe method for the procurement of a living donor graft, giving the patient a significantly shorter period of recovery, and thus is an attractive and recommendable alternative to traditional ODN procedures.

Adult↗

[Pararectal mini-incision for strictly retroperitoneal nephrectomy in living kidney donation].

PURPOSE: In this study we present the technique of a strictly retroperitoneal donor nephrectomy via a pararectal mini-incision. MATERIAL AND METHODS: Data of 34 living kidney donations were analyzed. All donors underwent a pararectal mini-incision and strictly retroperitoneal nephrectomy (MIDN). RESULTS: Total operation time, perioperative use of pain medication, length of hospital stay after successful mobilization, and return to full enteral nutrition and regular digestion were evaluated retrospectively. Total operation time for MIDN was 132+/-26 min. The total average application was 22.2+/-19.4 mg of opioid in morphine equivalent dosage (MED), 7.7+/-6.1 g metamizol, and 512+/-325 mg NSAR during hospital stay, which was 4.9+/-1.4 days. Patients were mobilized primarily 2.9+/-8.0 h after surgery. Mobility was achieved 33.8+/-15.8 h after surgery. Enteral nutrition with fluids was started after 1.9+/-7.0 h, full enteral nutrition was accomplished after 37.4+/-19.0 h, and normal digestion returned 58.6+/-23.0 h after the procedure. CONCLUSIONS: The strictly retroperitoneal nephrectomy via a mini-incision is an elegant, minimally traumatic, safe, and quickly learnable method, resulting in short hospital stays, good cosmetic results, and a low grade of complications.

Adult↗

Pretransplant calcium levels have no predictive value for delayed graft function, long-term graft function, cardiovascular events, or graft and patient survival in renal transplantation.

BACKGROUND: Disorders of calcium homeostasis are one of the most common problems in patients with end-stage renal disease (ESRD). Elevated calcium levels increase the incidence of cardiovascular mortality in ESRD patients, and appear to be a risk factor for the occurrence of delayed graft function (DGF) after kidney transplantation. Therefore, we investigated the impact of pretransplant serum calcium levels on outcomes after kidney transplantation: DGF, acute rejection, graft function, and survival, as well as the incidence of cardiovascular events. METHODS: We studied 285 patients (96.9% of all transplanted patients) who underwent their first transplantation between 1995 and 2004. Demographic data were extracted from hospital records or were documented during follow-up; serum samples were collected at the time of transplantation. RESULTS: In our cohort the incidence of DGF was 16.5% and 35.4% of acute rejection episodes (ARE). However, pretransplant calcium levels were not related to DGF or ARE in our patient cohort. Furthermore, there was no correlation between pretransplant serum calcium level with the incidence of cardiovascular events or mortality, as well as graft function or survival. CONCLUSION: In our study population pretransplant calcium levels showed no effect on DGF, ARE rate, the occurrence of cardiovascular events or death, renal graft function, or survival. Therefore, pretransplant calcium level is not a helpful marker for risk stratification at the time of transplantation.

Biomarkers↗

[Surgical management of patients with peritoneal carcinomatosis of gastrointestinal origin].

Peritoneal carcinomatosis is found in approximately 15 % of patients with colorectal cancer during the course of their disease, and is associated with a poor prognosis. Even more patients with gastric cancer develop peritoneal seeding. Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (HIPEC) have been introduced in the past decade and have led to 5-year survival rates of 30 to 40 % for selected patients with colorectal cancer and peritoneal carcinomatosis. These numbers have been demonstrated by many retrospective analyses and by prospective Phase II studies. The clinical assessment to select patients who will benefit from the combined therapy and achievement of complete macroscopic cytoreduction both play a crucial role. Less favourabale results have been achieved for patients suffering from stage IV gastric cancer with peritoneal seeding. Promising results were demonstrated for postoperative intraperitoneal chemotherapy following curative gastrectomy. Patients with hepatic, biliary and pancreatic cancers and peritoneal carcinomatosis do not benefit from cytoreductive surgery. There is a need for further multicentre, prospective trials analysing the use of hyperthermic intraperitoneal chemotherapy. They should be conducted in the specialised centres by interdisciplinary teams.

Antineoplastic Agents↗

[Renal cell carcinoma metastases to the thyroid gland -- report of 3 cases and review of the literature].

Clinically significant, solitary metastasis to the thyroid gland is a rare occurrence. The clear cell carcinoma of the kidney (RCC) is the most common primary tumor site. Late recurrence is a notable feature of renal carcinoma. Solitary metastases in the thyroid gland occur as late as 100-120 months from the date of nephrectomy. There is a clear survival benefit in selected cases if surgical approach to the thyroid metastases is chosen. In those patients who have undergone complete resection, 5-year-survival-rates of 50 % have been reported. We describe 3 cases of surgically treated thyroid metastases of RCC, and review the literature.

Aged↗

Who is willing to take the risk? Assessing the readiness for living liver donation in the general German population.

BACKGROUND: Shortage of donor organs is one of the major problems for liver transplant programmes. Living liver donation is a possible alternative, which could increase the amount of donor organs available in the short term. OBJECTIVE: To assess the attitude towards living organ donation in the general population to have an overview of the overall attitude within Germany. METHODS: A representative quota of people was evaluated by a mail questionnaire (n = 250). This questionnaire had 24 questions assessing the willingness to be a living liver donor for different potential recipients. Factors for and against living liver donation were assessed. RESULTS: Donating a part of the liver was almost as accepted as donating a kidney. The readiness to donate was highest when participants were asked to donate for children. In an urgent life-threatening situation the will to donate was especially high, whereas it was lower in the case of recipient substance misuse. More women than men expressed a higher disposition to donate for their children. Sex, religion, state of health and age of the donor, however, did not influence other questions on the readiness to consider living organ donation. The will for postmortem organ donation positively correlated with the will to be a living organ donor. CONCLUSIONS: The motivation in different demographic subgroups to participate in living liver transplantation is described. Differences in donation readiness resulting from the situation of every donor and recipient are thoroughly outlined. The acceptance for a living liver donation was found to be high - and comparable to that of living kidney donation.

Attitude to Health↗

Perioperative morbidity and quality of life in long-term survivors following cytoreductive surgery and hyperthermic intraperitoneal chemotherapy.

BACKGROUND: Improved prognosis can be achieved in selected patients with peritoneal carcinomatosis (PC) by major surgery and hyperthermic intraperitoneal chemotherapy (HIPEC). METHOD: Sixty seven patients with PC were operated with the aim of complete macroscopical cytoreduction followed by HIPEC (using cisplatin, mitomycin or mitoxantrone). Quality of life was assessed with the EORTC QLQ-C30 questionnaire. RESULTS: The patients had a variety of primary tumours, including appendix carcinomas (22/67). Mean operating time was 7 hours and complete cytoreduction was achieved in 58% of the patients. Overall morbidity was 34%. Post-operative mortality was 4.5%. The mean score for global health status of long-term survivors (20 questionnaires/25 patients) was 62.6 (73.3 for the control population, p=0.07). Functional status, particularly the role (56.4) and the social functioning (53.9) were impaired. CONCLUSION: Cytoreductive surgery combined with HIPEC is associated with an increased morbidity and mortality. Complications are predominantly related to major surgery. Following this aggressive treatment, survivors may achieve a satisfactory quality of life.

Adult↗

Steroid withdrawal or steroid avoidance in renal transplant recipients: focus on tacrolimus-based immunosuppressive regimens.

Steroid-induced adverse effects after transplantation include cosmetic, metabolic, and cardiovascular complications. Steroid withdrawal or avoidance with cyclosporine-based regimens have been hampered by an unacceptably high rate of acute rejections and increased rates of graft loss. Recently the results of several large, randomized trials of steroid withdrawal/avoidance with tacrolimus-based immunosuppression in renal transplant recipients became available. A review of these trials appeared to be of clinical interest. Data from the THOMAS trial clearly indicate that steroid withdrawal from a regimen of tacrolimus, mycophenolate mofetil (MMF), steroids after 3 months after transplantation is safe with regard to acute rejection rate and graft survival. If an induction therapy with daclizumab is used in combination with tacrolimus and MMF (CARMEN trial), even steroid avoidance is safe with regard to acute rejection rate and graft survival. Finally, in the ATLAS trial, steroid avoidance with basiliximab in combination with tacrolimus (resulting in tacrolimus monotherapy) or alternatively with tacrolimus and MMF both resulted in similar graft survival, but higher rates of acute rejection. In conclusion, steroid withdrawal is safe from a triple-drug regimen of tacrolimus, MMF, and steroids after 3 months after transplantation, and steroid use may completely be avoided with tacrolimus, and MMF combined with daclizumab induction. Tacrolimus monotherapy may be achieved using basiliximab induction at the price of higher rates of acute rejection, but with unaffected graft survival. Thus tacrolimus-based immunosuppression with or without interleukin-2 receptor antagonist induction has made steroid withdrawal or avoidance a realistic option in renal transplantation.

Drug Therapy, Combination↗

Short-term treatment with anti-CD44v7 antibody, but not CD44v4, restores the gut mucosa in established chronic dextran sulphate sodium (DSS)-induced colitis in mice.

Increased expression of CD44 variant isoforms have been shown on the inflammatory infiltrates in human and mouse colitis and blockade or deletion of CD44 isoforms inhibit experimental colitis. The objective of this study was to find out if short-term treatment of CD44 antibodies specific to CD44v7, but not to other variant isoforms, suppresses leucocyte-endothelial interaction in chronic dextran sodium sulphate (DSS)-induced colitis in mice. Chronic colitis was induced by oral administration of four cycles of 5% DSS in BALB/c mice. Expression of CD44 was investigated on isolated mononuclear cells of the gut immune system. In established colitis, mice were treated with antibodies against CD44v7 or CD44v4 three times in 7 days. Intravital microscopy was used to study leucocyte-endothelial interactions and leucocyte extravasation. As a marker of inflammatory infiltrates myeloperoxidase was quantified in gut tissue. CD44-induced apoptosis was determined by fluorescence staining of hypodiploidic cell nuclei. In chronic DSS-induced colitis both CD44 variant isoforms, v4 and v7 were significantly up-regulated on mononuclear cells. However, whereas anti-CD44v7 antibody treatment induced a marked restoration of the gut mucosa and significantly reduced endothelial sticking and extravasation of circulating leucocyte in vivo (P < 0.01), application of anti-CD44v4 or an isotype control antibody had no anti-inflammatory effect. A significant reduction of myeloperoxidase activity was detected after blockade of CD44v7, but not v4. Short-term treatment with anti-CD44v7 antibody blocks T cell extravasation and recruitment to the intestinal mucosa and cures established experimental colitis.

Animals↗

Cytoreductive surgery and intraperitoneal chemotherapy for pseudomyxoma peritonei.

BACKGROUND AND AIMS: Surgical improvement can be achieved in selected patients with pseudomyxoma peritonei (PMP) by major cytoreductive surgery and intraperitoneal chemotherapy (IPEC). The purpose of this retrospective study was to analyze morbidity, mortality, and survival following therapy. PATIENTS AND METHODS: Between July 1995 and September 2003, 28 patients (mean age 56 years, range 28-79) with PMP were operated on with the aim of complete macroscopical cytoreduction. Surgery was followed by IPEC. RESULTS: A macroscopically complete cytoreduction was achieved in 11 patients (40%). The mean operating time was 6 h with a mean of three peritonectomy procedures per patient. Cisplatin (15 out of 28), mitomycin C (6 out of 28) and 5-FU (7 out of 28) were used for the intraoperative chemotherapy. Overall morbidity was 36%. Most frequent surgical complications were digestive fistulae (3 out of 28), abscesses (5 out of 28) and bleeding (2 out of 28). Two patients died postoperatively. Patients with low tumor volume (mean survival time 78+/-11 vs. 37+/-9 months, p=0.05) and complete cytoreduction (73+/-10 vs. 24+/-8 months, p<0.05) had an improved prognosis. CONCLUSIONS: Cytoreductive surgery combined with IPEC is associated with acceptable morbidity and mortality. Complete cytoreduction may improve survival, particularly in selected patients with PMP who have a low tumor volume, complete cytoreduction, and no organ metastases.

Adult↗

[Pumpless extracorporeal lung assist using arterio-venous shunt in severe ARDS. Experience with 30 cases].

BACKGROUND: Extracorporeal lung assist has been proposed as an invasive measure in patients with acute respiratory distress syndrome (ARDS) when oxygenation is critically impaired. However, this technique generally requires high personnel and technical resources. We report on a new system, which is characterised by a short circuit arterio-venous shunt using arterio-venous pressure gradient as driving force (pumpless extracorporeal lung assist [pECLA]). PATIENTS AND METHODS: In 30 patients with ARDS due to multitrauma, pneumonia or after surgery (p(a)O(2)/F(I)O(2)-ratio 67+/-23 mmHg) pECLA was established by insertion of cannulae to the femoral artery and vein followed by connection with a membrane gas exchanger. For this system, only "low dose" continuous heparin infusion is required. RESULTS: Arterial oxygenation was acutely and significantly increased by pECLA (p(a)O(2)/F(I)O(2)=103+/-56 mmHg 2 h after begin) and carbon dioxide removal was markedly enhanced in 25 out of 30 patients (87%) allowing a lung protective ventilation strategy. The mean duration of pECLA therapy was 6.5 days, 15 patients (50%) died due to ARDS or non-ARDS related reasons. CONCLUSION: pECLA represents a feasable and effective treatment in patients with severe ARDS. Compared with pump-driven systems pECLA is characterised by low costs and reduced personnel requirements. However, mortality remains high in patients suffering from severe ARDS despite newer treatment modalities.

Adult↗

[Comparison of incomplete (135 degrees ) and complete prone position (180 degrees ) in patients with acute respiratory distress syndrome. Results of a prospective, randomised trial].

BACKGROUND: Ventilation in the prone position is carried out for improvement of pulmonary gas exchange in patients with acute respiratory distress syndrome (ARDS). We compared the effects of an incomplete prone position (IPP, 135( degrees )) with a complete prone position (CPP, 180( degrees )) in patients with ARDS. PATIENTS AND METHODS: For this trial 59 patients with ARDS were randomly assigned and were positioned in a "cross-over" design: patients of group A were placed in IPP for 6 h and then immediately positioned in CPP for another 6 h. Patients in group B were positioned in reverse order. Blood gases, hemodynamic measurements, quasistatic respiratory compliance and assessments of side effects were performed before begin, 30 min and 6 h after first positioning, then 30 min and 6 h after second positioning and 2 after repositioning. RESULTS: Turning patients in IPP and CPP resulted in a significant increase in the arterial oxygenation index (p(a)O(2)/F(I)O(2)), but this effect was more pronounced in the CPP (before: 142+/-46 mm Hg, 6 h: 253+/-107 mm Hg) than in the IPP (before: 139+/-54 mm Hg, 6 h: 206+/-75 mm Hg), and compliance was improved only in CPP. The improvement in arterial oxygenation persisted 2 h after repositioning in the supine position in both groups. The oxygenation responder rate was lower during the IPP (70.3%) in comparison with the CPP (84.0%, p<0.05). The incidence of side effects tended to be increased during the CPP. CONCLUSION: Incomplete prone position improves oxygenation in ARDS patients, but less effectively than a "classic" CPP. In these patients the use of a CPP should be preferred.

Aged↗

Cardiovascular morbidity and mortality in patients with diabetes mellitus type I after kidney transplantation: a case-control study.

BACKGROUND: The proportion of diabetics among patients requiring renal replacement therapy continues to increase in most western countries. The acceptance rate for renal transplantation varies among transplant centers and is influenced by the current opinion on the outcome of transplantation in diabetics. Controlled data on patient and graft survival in type I diabetics, however, are scarce. METHODS: We performed a retrospective case-control analysis on patient and graft survival and the cardiovascular morbidity of patients with type I diabetes after renal transplantation versus carefully matched non-diabetic transplant recipients. Match criteria were duration of previous hemodialysis, age and date of renal transplantation. Moreover, risk factors for cardiovascular disease in uremic patients were evaluated at the time of registration for renal transplantation and at the end of the observation period. RESULTS: Seventy-seven matched pairs were enclosed. Patient survival was significantly worse in the diabetic patients, graft survival was comparable in both groups, when graft loss because of patient's death was censored. In the diabetic patients, risk of death (odds ratio: 4.38) as well as the prevalence of cardiovascular morbidity (odds ratio: 4.47) were significantly higher than in the matched nondiabetic controls. Cox regression analysis showed that diabetes mellitus was an independent risk factor for patient survival; no association was found with hypertension, hyperlipidemia, hyperparathyroidism, calcium x phosphate product, body mass index and HbA1c. Cardiovascular morbidity, however, was already significantly higher in the diabetic group at the time of registration. CONCLUSIONS: Diabetes mellitus type I has a dominant impact on morbidity and mortality after renal transplantation and is associated with an approximately 4-fold higher risk of death. Cardiovascular disease accounts for the significantly worse long-term outcome of diabetic patients after renal transplantation.

Adult↗

Morbidity and mortality associated with pancreatogastrostomy and pancreatojejunostomy following partial pancreatoduodenectomy.

BACKGROUND: The pancreatic anastomosis is still the Achilles heel in partial pancreatoduodenectomy (PPD). METHODS: This study describes retrospectively a series of 441 patients who underwent standard or extended PPD and reconstruction by either pancreatogastrostomy or pancreatojejunostomy over a period of 13 years (1988-2000). RESULTS: Reconstruction of the pancreatic remnant was achieved by pancreatogastrostomy in 250 patients (56.7 per cent) and by pancreatojejunostomy in 191 patients (43.3 per cent). The leakage rate of the pancreatic anastomosis was 2.8 per cent after pancreatogastrostomy versus 12.6 per cent after pancreatojejunostomy (P < 0.001), whereas other surgical complications (bile leakage, haemorrhage, pancreatitis) were identical in the two groups. The leakage rate after standard PPD with or without vascular reconstruction was 2.0 per cent (four of 205 patients) after pancreatogastrostomy and 11.5 per cent (18 of 156) after pancreatojejunostomy (P < 0.001); following extended PPD it was 6.7 per cent (three of 45) after pancreatogastrostomy and 17.1 per cent (six of 35) after pancreatojejunostomy. The mortality rate due to leakage was 1.6 per cent (four of 250 patients) after pancreatogastrostomy versus 5.2 per cent (ten of 191) after pancreatojejunostomy (P = 0.037). CONCLUSION: Pancreatogastrostomy is a safe and reliable method of reconstruction after PPD that may be associated with a lower leakage and mortality rate than pancreatojejunostomy.

Adolescent↗