The deceased donor score system in kidney transplants from deceased donors after cardiac death.

SUMMARY: A clinical score to identify kidneys from donors after cardiac death (DCD) with a high risk of dysfunction following transplantation could be a useful tool to guide the introduction of new algorithms for the preservation of these organs and improve their outcome after transplantation. We investigated whether the deceased donor score (DDS) system could identify DCD kidneys with higher risk of early post-transplant dysfunction. The DDS was validated in a cohort of 168 kidney transplants from donors after brain death (DBD) and then applied to a cohort of 56 kidney transplants from DCD. In the DBD cohort, the DDS grade predicted the incidence of delayed graft function (DGF) and levels of serum creatinine at 3 and 12 months post-transplant. Similarly, in the DCD cohort, the DDS grade correlated with DGF and also predicted the levels of serum creatinine at 3 and 12 months. Interestingly, the DDS identified a subgroup of marginal DCD kidneys in which minimization of cold ischemia time produced better early clinical outcome. These results highlight the impact of early interventions on clinical outcome of marginal DCD kidneys and open the possibility of using the DDS to identify those kidneys that may benefit most from therapeutic interventions before transplantation.

Improved Baculovirus Vectors for Transduction and Gene Expression in Human Pancreatic Islet Cells.

Pancreatic islet transplantation is a promising treatment for type 1 diabetes mellitus offering improved glycaemic control by restoring insulin production. Improved human pancreatic islet isolation has led to higher islet transplantation success. However, as many as 50% of islets are lost after transplantation due to immune responses and cellular injury, gene therapy presents a novel strategy to protect pancreatic islets for improved survival post-transplantation. To date, most of the vectors used in clinical trials and gene therapy studies have been derived from mammalian viruses such as adeno-associated or retrovirus. However, baculovirus BacMam vectors provide an attractive and safe alternative. Here, a novel BacMam was constructed containing a frameshift mutation within fp25, which results in virus stocks with higher infectious titres. This improved in vitro transduction when compared to control BacMams. Additionally, incorporating a truncated vesicular stomatitis virus G protein increased transduction efficacy and production of EGFP and BCL2 in human kidney (HK-2) and pancreatic islet ß cells (EndoC ßH3). Lastly, we have shown that our optimized BacMam vector can deliver and express egfp in intact pancreatic islet cells from human cadaveric donors. These results confirm that BacMam vectors are a viable choice for providing delivery of transgenes to pancreatic islet cells.

[Total gastrectomy in the management of Ménétrie's disease. Institutional experience and review of the literature]. / Gastrectomía total en el manejo de la enfermedad de Ménétrier. Experiencia institucional y revisión de la literatura.

OBJECTIVE: Analyze retrospectively the clinical, histopathological and surgical characteristics of patients with Mindtrier's disease (MD) at our Institution. BACKGROUND DATA: Ménétrier's disease (MD) includes hipertophy of gastric mucosa, hipo or hiperchloridria and severe hipoalbuminemia. In the literature, it has been underestimated its relationship with the development of gastric carcinoma. METHODS: We analyzed retrospectively the clinical trials of patients with MD treated surgically at our Institution during the last three decades (From 1970 through 2002). RESULTS: Three patients with clinical diagnosis of MD underwent total gastrectomy during the study period. All of them were corroborated histopathologically and in one patient carcinoma in situ was demonstrated in the surgical specimen. CONCLUSIONS: There is a very limited experience with surgical treatment of MD and it is limited to patients who have severe hipoalbuminemia or associated malignant disease. However accordig to our experience and literature review, surgical treatment should be considered early in the course of the disease for the relationship between MD and gastric adenocarcinoma.

Low serum albumin is not a contraindication for early iatrogenic bile duct injury repair.

UNLABELLED: Most iatrogenic bile duct injuries are recognized in the early postoperative period (first 48 hours). These patients usually have additional complications such as a suboptimal hydroelectrolitic status, subhepatic collections, external biliary fistula and malnutrition. In these circumstances, besides the elevation of bilirubin and transaminases associated with the injury, hypoalbuminemia is frequently encountered. The timing for repair is decided according to the condition of each patient. We report the impact of preoperative abnormal low serum albumin levels on the results of biliary tract reconstruction after a iatrogenic biliary lesion. METHOD: Patients who underwent biliary reconstruction in our center from 1998 to 2002 were analyzed. Only patients with complex injuries (Strasberg E, Bismuth III-IV, Stewart-Way III) were included. Major postoperative complications were recorded and correlated with preoperative liver function tests. RESULTS: Seventy seven patients were analyzed. In 41 cases, the injury was a consequence of a laparoscopic operation. All patients were treated by a Roux-en-Y hepatojejunostomy. No operative mortality was recorded. The most frequent postoperative complications were postoperative biliary fistula (8/77-9%, p < 0.017) and subhepatic collections (9/77-9%, p < 0.39). All fistulae closed spontaneously and the subhepatic collections were drained. Overall, complications were more common in the group with hypoalbuminemia (p < 0.002). CONCLUSION: Early repair is indicated if there is no systemic contraindication (sepsis, multiple organic failure, electrolytic imbalance). Abnormalities in the liver function tests, particularly a low serum albumin, should not delay the operation. Although significantly more postoperative complications are observed in an early repair, long-term results are comparable to those of an elective repair.

Complete resection of choledochal cyst with Roux-en-Y derivation vs. cyst-enterostomy as standard treatment of cystic disease of the biliary tract in the adult patient.

BACKGROUND/AIMS: Cystic disease of the biliary tract (CDBT) is characterized by varying degrees of dilatation of the biliary system with high morbidity and mortality in which the surgical management is the corner stone of treatment. The cyst-enterostomies (CE) temporarily solve the obstruction to the biliary flow but have a high long-term morbidity. Complete resection of affected bile ducts with Roux-en-Y derivation (CRR-en-Y) is a good procedure with low mortality and complications. The purpose of the study was to analyze the outcome of CRR-en-Y versus CE in the treatment of CDBS in adult patients from 1970 to 2002. METHODOLOGY: Patients who underwent surgical treatment were divided for their analysis into two groups: Group I: CRR-en-Y and Group II: CE. Following features were compared: demography, clinical picture, postoperative morbimortality, outcome and survival. RESULTS: Thirty-four adult patients were analyzed. There were 82% (28) females and 18% (6) males. The age average was 33.58 years (13-84). Seventy percent (30) were "choledochal cyst". Eighty percent (27) were surgically handled: 52% (14) with CRR-en-Y (Group I) versus 58% (13) with CE (Group II). Both groups were comparable. Without operative mortality and low postoperative morbidity in both, CE had more long-term complications: In this group 70% (9) were readmitted: and 7 underwent reoperation. Mean follow-up was 35 months (6-132) versus 152 months (12-408) respectively. CONCLUSIONS: CRR-en-Y is the standard treatment of CDBS in the adult patient.

[Surgical techniques in liver transplantation]. / Técnicas quirúrgicas en trasplante hepático.

Liver transplantation (LT) is probably the biggest surgical aggression that a patient can endure. It was considered only as a last option in the era of experimental LT, yet it evolved into the definitive treatment for some types of acute and chronic end stage liver disease. In terms of technique LT is the most complex of all types of transplantations. The surgical procedure in itself is well established and has changed little through time. Liver transplantation owes its improvement to better and more systematic anesthetic procedures and to perioperative care more than being due to improvement of the surgical technique. The first surgical procedure was described by Thomas Starzl in 1969. His initial work has been strengthened with the development of venous bypass, the refinement in vascular and biliary reconstruction technique and the development of the split liver. Up to date technical aspects of orthotopic liver transplantation are described in the present article.

Polysplenia syndrome in the adult patient. Case report with review of the literature.

AIMS: To report a case of polysplenia syndrome (PSS) in an adult patient. BACKGROUND: The PSS is a form of situs ambiguous with multiple spleen, cardiac anomalies, abdominal heterotaxia, short pancreas, major venous system and bronquial malformations. It is a rare syndrome, more often found in childhood, and only the 10% of the patients that do not have cardiac anomalies can reach adulthood. RESULTS: A 56 y/o male with obstructive jaundice and intestinal obstruction who was submitted to an abdominal laparotomy suspecting cholangiocarcinoma. He had choledocolithiasis, duodenal kinking by a preduodenal portal vein, intestinal levorotation, hypoplasic vena cava with a prominent acigos vein, short pancreas and polysplenia. A cholecistectomy, biliodigestive and gastroyeyunal bypasses were performed without any complications and with a successful evolution. CONCLUSIONS: In conclusion, PSS is a rare hereditary syndrome that often occurs in childhood and its discovery in an adult is frequently fortuitus. Surgical treatment is an excellent therapeutic option, however is reserved just for complications. The outcome is good and the final evolution depends on the degree of the cardiac anomalies.

[Renal artery stenosis after transplantation: treatment using percutaneous transluminal angioplasty and placement of an expandable metal luminal prosthesis]. / Estenosis arterial renal posterior a trasplante: tratamiento con angioplastia transluminal percutánea y colocación de endoprótesis luminal metálica expandible.

UNLABELLED: Transplant renal artery stenosis (TRAS) is a cause of severe post transplant hypertension with a widely variable reported incidence from 1 to 25%. We herein report 3 cases of endoluminal stent placement after percutaneous transluminal angioplasty for treatment of TRAS. Clinical and laboratory findings during their follow-up, suggestive of TRAS included: elevated mean blood pressure, bruit over the graft area(2/3), and increase in serum creatinine (2/3). Doppler sonography, radioisotope renography and arteriography were performed to confirm TRAS diagnosis. The series includes 2 female and 1 male patients; the time elapsed between transplantation and TRAS diagnosis was 25 d, 12 and 65 months, respectively. All grafts were from living related donors. Patients received at least 3 antihypertensive drugs without adequate blood pressure control. Vascular anastomosis was end to end from the renal to the hypogastric artery in two cases, and end to side to the external iliac artery in the other one. After the diagnosis of TRAS, percutaneous transluminal angioplasty with endoluminal metallic Palmaz stent placement was accomplished in the three cases. No complications occurred during or after the procedures. Beneficial clinical results were obtained in all cases documented by a decrease in both: serum creatinine, and mean blood pressure. Average follow-up after stent placement was 13, 19 and 36 months, respectively without evidence of stenosis recurrence CONCLUSIONS: Percutaneous transluminal angioplasty with stent placement is a safe and effective treatment for TRAS associated hypertension and renal dysfunction. Extended follow-up is necessary to evaluate long-term efficacy and safety of this procedure.

[Cystic disease of the biliary tract. Three decades of institutional experence]. / Enfermedad quística de la vía biliar en el adulto. Tres décadas de experiencia institucional.

INTRODUCTION: Cystic disease of biliary tract (CDBT) characterizes by the presence of sacular expansions of the biliary tree. It is an uncommon disease associated with high morbidity and malignant transformation. More than 60% of patients are women and can be diagnosed in the adult life. OBJECTIVE: To evaluate the results obtained during last three decades in the management of CDBT in the adult patient. PATIENTS AND METHODS: All the patients with CDBT treated from 1970 to 2002 were included. Demographic data, clinical picture, boarding diagnosis, classification, treatment, evolution and survival were analyzed. RESULTS: 34 patients. Twenty eight (82%) women and 6 (18%) men with a mean age of 33 years (range 13-84). The most frequent symptoms were abdominal pain, nausea-vomit and jaundice. Cholangiography was made in all cases. All the types described by Todani were documented. Twenty-seven patients (80%) were surgically treated. The mean follow-up was 84 months (range 1-408 months). Fifteen patients (44.1%) were readmitted and 9 (26.4%) had a reoperation. Three (9%) died with malignant transformation. The global survival was 91.1% to 12 months. CONCLUSIONS: In the adult patient, diagnosis of CDBT requires a high level of suspicion and its confirmation depends on the image studies. The CDBT diagnosis considers an indication of surgical treatment. Complete resection of the biliary tract with Roux en-Y hepato-jejunal anastomosis have less rate of mechanical complications, hospitalary readmissions and surgical reintervention.

[Portal hypertension. Evidence-based guide]. / Hipertensión portal. Guía basada en la evidencia.

Treatment of portal hypertension has evolved widely during the last decades. Advances in physiopathology have allowed better application of therapeutic options and also have permitted to know the natural history of varices and variceal bleeding, predicting which patients have a higher risk of bleeding. It also permits probability of designing patient treatment. According to liver function and subadjacent liver disease, it is possible to offer different alternatives within the three possible scenarios (primary prophylaxis, acute bleeding episode, and secondary prophylaxis). For primary prophylaxis, pharmacotherapy offers the best choice. Endoscopic banding is also growing in these scenarios and probably will be accepted in the near future. For the acute bleeding episode, endoscopic therapy (sclerosis and/or bands) and/or pharmacologic therapy (octreotide, terlipresin) represent best choice, considering TIPS as a rescue option. Surgery is not used routinely in this scenario in most centers. For secondary prophylaxis, pharmaco- and endoscopic therapy are first-line treatments, while TIPS and surgery as second-line treatments. TIPS is mainly used in patients on a waiting list for liver transplantation. Surgery offers good results for low-risk patients, with good liver function and with portal blood-flow preserving procedures (selective shunts, extensive devascularizations). Liver transplantation is recommended for patients with poor liver function because together with portal hypertension, it treats subadjacent liver disease.

[Extracolonic manifestation as first sign of colorectal carcinoma. Report of 2 cases]. / Manifestación extracolónica como primera evidencia de carcinoma colorrectal. Informe de dos casos.

INTRODUCTION: In Mexico, colorectal cancer is the second most common malignant tumor of digestive tract; incidence is proportional to patient age. At time of diagnosis, 20% of patients can be found with metastases, liver and lung the organs affected most frequently. OBJECTIVE: To present two young patients, whose primary complaints were atypical extracolonic symptoms of colorectal cancer. CASE DESCRIPTION: CASE 1: A 44-year-old female who presented with left pleural effusion, with growth in culture positive for enterobacterias. Barium enema showed tumor in splenic flexure. Surgical resection was performed including, left kidney, spleen, tail of pancreas, and fourth portion of duodenum. Colo-pleural fistula was repaired with primary closure. The pathology report noted locally advanced adenocarcinoma of colon (T4 N0 M0). CASE 2: A 22-year-old female, who presented with a 30 day history of neurologic complaints. Computer tomography of head and MRI of brain identified a mass at level of cerebellum; specimen biopsy report was consistent with metastasis adenocarcinoma. Colonoscopy found a tumor located 12 cm from anal verge. The patient underwent sigmoid resection. Pathology confirmed the presence of moderately differentiated adenocarcinoma and 14/22 positive nodes (T3, N2, M1). CONCLUSION: The most common sites of metastases secondary to colorectal cancer are liver and lung, up to 30% at diagnosis, and usually are asymptomatic. We reported two patients whose first evidence of disease were atypical symptoms related to unusual sites of colorectal cancer extension.

[Esophageal closed transection for surgical treatment of portal hypertension. A 10-year experience]. / Transección cerrada de esófago para el tratamiento quirúrgico de hipertensión portal. Experiencia en 10 años.

BACKGROUND: Extensive esophagogastric devascularization (Sugiura-Futagawa operation and complete portoazygos disconnection) are excellent alternate choices for low-risk patients (Child-Pugh A-B) in whom a selective shunt is not feasible, obtaining a low postoperative rebleeding rate and a good quality of life. Esophageal transection is an important step in these procedures because submucosal varices are obliterated, achieving complete portoazygos disconnection. Results during one decade with closed variant of esophageal transection are reported. METHOD: Between 1990 and 2000, 78 patients were operated on (69 Child-Pugh A and nine Child Pugh B) in two operative stages with Sugiura-Futagawa operation and complete portoazygos disconnection. Files of these patients were reviewed and recurrence of hemorrhage was evaluated as well as fistulization and dehiscence. RESULTS: Among 78 modified transections, only one case of dehiscence was observed (1.2%) (very early in our experience) with concomitant mortality. Rebleeding was observed in 11% of cases, with two cases of stenosis that required dilatation. During the last 7 years (57 patients), no complication has been observed. CONCLUSIONS: Modified transection has a very low complication rate with long-term results comparable to those of classic transection.

Técnicas quirúrgicas en trasplante hepático / Surgical techniques in liver transplantation

Liver transplantation (LT) is probably the biggest surgical aggression that a patient can endure. It was considered only as a last option in the era of experimental LT, yet it evolved into the definitive treatment for some types of acute and chronic end stage liver disease. In terms of technique LT is the most complex of all types of transplantations. The surgical procedure in itself is well established and has changed little through time. Liver transplantation owes its improvement to better and more systematic anesthetic procedures and to perioperative care more than being due to improvement of the surgical technique. The first surgical procedure was described by Thomas Starzl in 1969. His initial work has been strengthened with the development of venous bypass, the refinement in vascular and biliary reconstruction technique and the development of the split liver. Up to date technical aspects of orthotopic liver transplantation are described in the present article.

Probablemente, el trasplante hepático (TH) constituye la mayor agresión quirúrgica a la que se pueda someter un paciente. En la era experimental del trasplante de hígado, éste era considerado como una terapéutica de último recurso. Con el paso del tiempo ha terminado por imponerse como el tratamiento definitivo de algunas hepatopatías agudas y crónicas terminales. Técnicamente, el trasplante de hígado es el más complejo de todos los trasplantes. La técnica quirúrgica está bien establecida desde hace muchos años y no ha cambiado mucho. Más que a los avances recientes de la técnica, el TH debe su evolución quirúrgica al dominio protocolizado de la técnica anestésica y de los cuidados perioperatorios. La técnica quirúrgica inicial fue descrita por Thomas Starzl en 1969. Sus aportaciones iniciales han sido fortalecidas con el desarrollo de un sistema de derivación de la sangre venosa, el perfeccionamiento en la reconstrucción vascular y biliar y el desarrollo de avanzadas técnicas de reducción o de bipartición del injerto hepático. En el presente artículo se describen aspectos técnicos actuales relacionados con el trasplante hepático ortotópico (THO).