Publications by authors named "Marcel Benavides"

Article Synopsis
  • * A retrospective analysis of data from January 2010 to March 2023 examined 78 children with BL, highlighting different treatment methods: observation, percutaneous transhepatic cholangiography (PTC), endoscopic retrograde cholangiopancreatography (ERCP), and surgery.
  • * Results showed that patients managed conservatively had lower bilirubin levels, and those treated with PTC had higher rates of biliary stricture compared to surgery, suggesting that observation might be a valid approach in some cases.
View Article and Find Full Text PDF

Background: Currently, graft options for pediatric liver transplantation (PLT) include whole (WL) and partial (P) grafts, in the form of either deceased donor transplantation (DD) or living donor liver transplantation (LD). WL transplants from LD are commonly referred to as domino LT. The objective of this manuscript is to compare the outcomes of PLT performed with each of the available graft options.

View Article and Find Full Text PDF

Background: Endovascular management of portal vein thrombosis (PVT) is challenging. Transsplenic access (TSA) is growing as an access option to the portal system but with higher rates of bleeding complications. The aim of this article is to evaluate the efficacy and safety of transsplenic portal vein recanalization (PVR) using a metallic stent after pediatric liver transplantation.

View Article and Find Full Text PDF

Background: The techniques involved in neonatal and infantile transplantation require approaches that can sculpt a left lateral segment (LLS) to the right shape and size and avoid large-for-size syndrome. The aim of this article is to describe the anterior hepatic resection (AHR) of the LLS in pediatric LDLT.

Methods: A retrospective anatomical study of preoperative image studies, description of the technique for AHR, and short-term results.

View Article and Find Full Text PDF

Left lateral segment grafts have become a suitable option in pediatric liver transplantation (PLT). The correlation between hepatic vein (HV) reconstruction and outcome is relevant when assessing the safe use of these grafts. We retrospectively reviewed the medical records prospectively collected from a pediatric living donor liver transplantation database and conducted a comparative analysis of the different left lateral segment graft types according to HV reconstruction.

View Article and Find Full Text PDF

Background: infants who require liver transplantation represent a treatment challenge because chronic liver disease at this early age affects the child's growth and development during a critical phase. The aim is to compare demographics, operative data, and long-term outcomes according to recipient weight at the time of LDLT.

Methods: This retrospective study included primary LDLT analyzed in 2 groups: BW ≤ 7 kg (n = 322) and BW > 7 kg (n = 756).

View Article and Find Full Text PDF

Methods: We present a series of three patients with large hepatocellular adenoma lesions showing a central location, for which the living donor liver transplantation strategy was used as a backup procedure.

Results: Hepatocellular adenoma was confirmed by biopsy in all patients. Surgical resection was indicated because of the patients' symptoms and lesion size and growth.

View Article and Find Full Text PDF

Background: The impact of the COVID pandemic on liver transplant (LT) programs varied among countries. Few data are available about that impact in pediatric liver transplant (PLT) programs. This study aimed at comparing the data of our program in Brazil (2019 vs.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates outcomes of liver transplantation (LT) in patients with cirrhosis and hypoxia, focusing on those with different levels of arterial oxygen pressure (PaO).
  • Patients were split into two groups based on their PaO levels, with significant differences noted in their need for supplemental oxygen, mechanical ventilation (MV) duration, and hospital stays.
  • Despite differences in recovery needs, survival rates at 90 months were comparable between the groups, indicating that severe hypoxia does not drastically impact long-term survival post-transplant.
View Article and Find Full Text PDF

Pediatric living donor liver transplantation (PLDLT) is a successful therapeutic option for children with chronic and acute liver disease. After early transplant results, many technical advancements were introduced in the field to reduce the rate of complications and improve survival. The aim of this study is to present the outcomes of 975 primary PLDLTs in 3 periods: initial practice (period 1, 29 patients, January 1995 to December 1999), second period (period 2, 331 patients, January 2000 to December 2009), and third period (period 3 [P3], 615 patients, January 2010 to September 2019).

View Article and Find Full Text PDF

Background: Data describing the technical aspects of living donor (LD) domino liver transplantation (DLT) in maple syrup urine disease (MSUD) are limited. The largest published series includes only 3 cases. One great challenge of this procedure is to ensure adequate vascular stumps for the LD, the MSUD patient, and the recipient of the domino graft.

View Article and Find Full Text PDF

CMV infection plays an important role in the postoperative course following solid organ transplantation. We present the case of an 11-year-old male patient who underwent LDLT due to severe hepatopulmonary syndrome and biliary cirrhosis. Four weeks after LDLT, he developed persistent GI bleeding and was subjected to repeated endoscopic treatment and radiological arterial embolization to stop the bleeding from duodenal ulcers.

View Article and Find Full Text PDF

Although rare, ALF caused by disseminated HSV infection is associated with high mortality in the neonatal population. This condition is often diagnosed relatively late due to the absence of specific signs. We present a case involving a neonate with ALF submitted to living donor liver transplantation without a prior diagnosis.

View Article and Find Full Text PDF

The association between LT and gastrectomy is not common. Only two studies reported the gastrectomy/LT association in children. Here, we report three children who underwent LT who required a concomitant or sequential gastrectomy for different reasons.

View Article and Find Full Text PDF

Background: Biliary complications (BCs) remain an important cause of morbidity after pediatric liver transplantation. Technical factors have already been implicated in the development of BCs. Previous reports have associated the use of partial grafts, particularly living donor grafts, with a higher incidence of BCs.

View Article and Find Full Text PDF

Re-LT is the only recourse for patients with liver graft failure. However, survival rates after re-LT are lower than those of primary transplants. Few reports are available regarding re-LT with LDs in children.

View Article and Find Full Text PDF

Background: Hepatic artery thrombosis (HAT) increases morbidity and mortality after liver transplantation (LT). The identification of risk factors for HAT may aid transplant teams in the development of strategies aimed at reducing HAT. This article describes the risk factors for HAT and outcomes after LT.

View Article and Find Full Text PDF

Living donor liver donation (LDLD) is an alternative to cadaveric liver donation. We aimed at identifying risk factors and developing a score for prediction of postoperative complications (POCs) after LDLD in donors. This is a retrospective cohort study in 688 donors between June 1995 and February 2014 at Hospital Sírio-Libanês and A.

View Article and Find Full Text PDF

Biliary atresia (BA) is the main diagnosis leading to liver transplantation (LT) in children. When diagnosed early in life, a Kasai portoenterostomy (Kasai-PE) can prevent or postpone LT. Instances of previous operations can result in difficulties during the LT.

View Article and Find Full Text PDF

The technique of vascular reconstruction plays a major role in the outcome of living donor liver transplantation (LDLT). An increased use of vascular grafts (VGs) as replacements for sclerotic portal veins has become a standard technique for our group. The aim of this study was to analyze the factors associated with portal vein thrombosis (PVT) in pediatric LDLT.

View Article and Find Full Text PDF

The incidence of biliary complications (BCs) after living donor liver transplantation (LDLT) can reach 40%. Published data on the pediatric population are limited, and treatment protocols vary. Our aim was to describe the clinical scenario for BCs and treatment approaches after LDLT.

View Article and Find Full Text PDF
Article Synopsis
  • Ascites is a common and serious complication of cirrhosis in children, linked to higher mortality rates, especially if patients do not receive a liver transplant.
  • A study of pediatric patients on the transplant list found that factors like total bilirubin, INR, serum sodium, ascites, and age were associated with an increased risk of death within 90 days.
  • The research highlights the need for multicenter studies to better understand these variables and enhance liver allocation policies.
View Article and Find Full Text PDF

The vascular anomalies encountered in patients with biliary atresia associated with polysplenia syndrome and situs inversus (SI) demand technical refinements when liver transplantation is being performed. The available data describing the technique used in living donor liver transplantation (LDLT) in this population are limited; the short vascular stumps of the donor's liver can impart additional technical difficulties during vascular reconstruction. Here we describe our experience with 9 children with biliary atresia and SI who underwent LDLT.

View Article and Find Full Text PDF

The association of biliary atresia (BA) with congenital heart diseases has been extensively described, and there are a number of reports on the outcomes of patients in this group who undergo liver transplantation (LT). The intraoperative management and the timing of LT for patients with end-stage liver disease are matters of debate, especially when complex heart diseases are involved. This report describes the outcome after LT for a pediatric recipient with BA and hypoplastic left heart syndrome.

View Article and Find Full Text PDF

The availability of living donors allows transplant teams to indicate living donor liver transplantation (LDLT) early in the course of liver disease before the occurrence of life-threatening complications. Late referral to transplant centers is still a problem and can compromise the success of the procedure. The aim of this study was to examine the perioperative factors associated with patient and graft survival for 430 consecutive pediatric LDLT procedures at Sirio-Libanes Hospital/A.

View Article and Find Full Text PDF