RESUMO
Graft survival after small bowel transplantation remains impaired due to acute cellular rejection (ACR), the leading cause of graft loss. Although it was shown that the number of enteroendocrine progenitor cells in intestinal crypts was reduced during mild ACR, no results of Paneth and intestinal stem cells localized at the crypt bottom have been shown so far. Therefore, we wanted to elucidate integrity and functionality of the Paneth and stem cells during different degrees of ACR, and to assess whether these cells are the primary targets of the rejection process. We compared biopsies from ITx patients with no, mild, or moderate ACR by immunohistochemistry and quantitative PCR. Our results show that numbers of Paneth and stem cells remain constant in all study groups, whereas the transit-amplifying zone is the most impaired zone during ACR. We detected an unchanged level of antimicrobial peptides in Paneth cells and similar numbers of Ki-67+ IL-22R+ stem cells revealing cell functionality in moderate ACR samples. We conclude that Paneth and stem cells are not primary target cells during ACR. IL-22R+ Ki-67+ stem cells might be an interesting target cell population for protection and regeneration of the epithelial monolayer during/after a severe ACR in ITx patients.
Assuntos
Rejeição de Enxerto/fisiopatologia , Sobrevivência de Enxerto , Intestino Delgado/fisiopatologia , Intestino Delgado/transplante , Transplante de Órgãos/efeitos adversos , Celulas de Paneth/citologia , Células-Tronco/citologia , Adolescente , Adulto , Feminino , Seguimentos , Rejeição de Enxerto/etiologia , Humanos , Masculino , Celulas de Paneth/metabolismo , Prognóstico , Fatores de Risco , Células-Tronco/metabolismo , Adulto JovemRESUMO
BACKGROUND: Intestinal failure (IF) patients received parenteral nutrition (PN) as the only available therapy until intestinal transplantation (ITx) evolved as an accepted treatment. The aim of this article is to report the long-term outcomes of a series of ITx performed in pediatric and adult patients at a single center 9 years after its creation. PATIENTS AND METHODS: This is a retrospective analysis of the ITx performed between May 2006 and January 2015. Diagnoses, pre-ITx mean time on PN, indications for ITx, time on the waiting list for types of ITx, mean total ischemia time, and warm ischemia time, time until PN discontinuation, incidence of acute and chronic rejection, and 5-year actuarial patient survival are reported. RESULTS: A total of 42 patients received ITx; 80% had short gut syndrome (SG); the mean time on PN was 1620 days. The main indication for ITx was lack of central venous access followed by intestinal failure-associated liver disease (IFALD) and catheter-related infectious complications. The mean time on the waiting list was 188 days (standard deviation, ±183 days). ITx were performed in 26 children and 14 adults. In all, 32 procedures were isolated ITx (IITX); 10 were multiorgan Tx (MOT; 3 combined, 7 multivisceral Tx (MVTx), 1 modified MVTx and 2 with kidney); 2 (4.7 %) were retransplantations: 1 IITx, 1 MVTx, and 5 including the right colon. Thirteen patients (31%) received abdominal rectus fascia. All procedures were performed by the same surgical team. Total ischemia time was 7:53 ± 2:04 hours, and warm ischemia time was 40.2 ± 10.5 minutes. The mean length of implanted intestine was 325 ± 63 cm. Bishop-Koop ileostomy was performed in 67% of cases. In all, 16 of 42 Tx required early reoperations. The overall mean follow-up time was 41 ± 35.6 months. The mean time to PN discontinuation after Tx was 68 days (P = .001). The total number of acute cellular rejection (ACR) episodes until the last follow-up was 83; the total number of grafts lost due to ACR was 4; and the total graft lost due to chronic rejection was 3. At the time of writing, the overall 5-year patient survival is 55% (65% for IITx vs 22% for MOT; P = .0001); 60% for pediatric recipients vs 47% for adults (P = NS); 64% when the indication for ITx was SG vs 25% for non-SG (P = .002). CONCLUSIONS: At this center, candidates with SG, in the absence of IFALD requiring IITx, showed the best long-term outcomes, independent of recipient age. A multidisciplinary approach is mandatory for the care of intestinal failure patients, to sustain a rehabilitation and transplantation program over time.
Assuntos
Rejeição de Enxerto/epidemiologia , Intestinos/transplante , Falência Renal Crônica/cirurgia , Falência Hepática/cirurgia , Transplante de Fígado , Nutrição Parenteral Total/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Síndrome do Intestino Curto/cirurgia , Adulto , Argentina , Criança , Feminino , Humanos , Enteropatias/complicações , Enteropatias/cirurgia , Falência Renal Crônica/complicações , Falência Hepática/etiologia , Masculino , Nutrição Parenteral Total/efeitos adversos , Reoperação , Estudos Retrospectivos , Síndrome do Intestino Curto/complicações , Listas de Espera , Isquemia QuenteRESUMO
BACKGROUND: We report the case of a 7-year-old girl with intestinal failure owing to a cystic lymphangioma compromising the root of the mesentery, not amenable to resection, leading to intestinal failure. Oncologic treatment was attempted to reduce tumor size with no response; therefore, she was listed for multivisceral transplantation. PROCEDURE: Resection of the tumor required resection of all abdominal organs with vascular inflow and outflow. A multivisceral graft (liver, stomach, duodenum-pancreas and spleen complex, small bowel, and right colon) was implanted. For vascular reconstruction, donor's superior vena cava was sutured to the recipient's suprahepatic veins in a common patch. For arterial inflow, an arterial conduit was placed directly to the infrarenal aorta, and sutured to an aortic patch of the graft. Cold ischemia time was 8:45 hours; warm ischemia time was 35 minutes. A double-layer gastrogastric anastomosis and piloroplasty was made; and the distal reconstruction was performed with ileocolic side-to-end anastomosis that allowed to perform of a Bishop-Koop ileostomy for endoscopic monitoring. OUTCOME: The patient recovered well after the procedure and was discharged 36 days after transplantation with intestinal sufficiency. To the best of our knowledge, this is the first report describing cystic lymphangioma as an indication for multivisceral transplantation.
Assuntos
Intestinos/transplante , Transplante de Fígado/métodos , Linfangioma Cístico/cirurgia , Mesentério , Transplante de Pâncreas/métodos , Neoplasias Peritoneais/cirurgia , Baço/transplante , Criança , Feminino , HumanosRESUMO
CASE REPORT: A 24-year-old man diagnosed with Peutz-Jeghers syndrome as a child underwent multiple surgeries owing to intussusception. Pretransplant workup showed >150 polyps along the gastrointestinal (GI) tract, some of them with high-grade dysplasia. Despite having intestinal sufficiency, a modified multivisceral transplantation was offered. PROCEDURE: An 18-year-old donor was procured using University of Wisconsin solution. The recipient's surgery started with a midline incision. Mobilization of the right colon and the root of the mesentery was done to isolate the superior mesenteric artery. The same maneuver was done with the left and sigmoid colon. The common bile duct was then isolated and transected at the cystic duct level. The abdominal portion of the esophagus and the proximal stomach were isolated and divided at the gastroesophageal junction. After that, the pancreas was mobilized, preserving the spleen with the splenic vessels. The distal GI tract was transacted at the level of the proximal rectum. For engraftment, an arterial conduit was placed in the infrarenal aorta and anastomosed to the graft's aortic patch. End-to-side portal reconstruction was made at the level of the portal vein, allowing performing a duct-to-duct biliary reconstruction over a 5-Fr T-tube. A hand-sewn gastrogastric anastomosis and piloroplasty were performed; the distal anastomosis was done with circular staplers. A gastrojejunostomy and a loop ileostomy were the final steps of the procedure. RESULTS: The patient stayed in intensive care for 2 days and enteral feeds were started on day 7. Currently, 23 months after transplant he is alive with an excellent quality of life.
Assuntos
Transplante de Órgãos/métodos , Síndrome de Peutz-Jeghers/cirurgia , Baço/cirurgia , Adolescente , Humanos , Masculino , Adulto JovemRESUMO
INTRODUCTION: Understanding abdominal vascular anatomy is crucial for multiorgan recovery. In this case report, we have described a common hepatic artery that arises from the superior mesenteric artery but follows an intrapancreatic course. METHODS: The donor was ideal for multiorgan recovery and the recipient was a 29-year-old woman awaiting a second transplant owing to primary nonfunction of her first engrafted organ. The indication for transplantation was secondary biliary cirrhosis. A type I diabetic recipient on dialysis therapy was awaiting the kidney and pancreas. RESULTS: The urgent condition of our liver recipient combined with the anatomical finding prioritized liver procurement, therefore the pancreas was discarded. CONCLUSIONS: The recognition of all anatomic variations will allow us to improve the use of the scarce resource of deceased donor organs.
Assuntos
Hepatectomia , Artéria Hepática/anormalidades , Artéria Hepática/cirurgia , Cirrose Hepática Biliar/cirurgia , Transplante de Fígado , Artéria Mesentérica Superior/anormalidades , Artéria Mesentérica Superior/cirurgia , Doadores de Tecidos/provisão & distribuição , Coleta de Tecidos e Órgãos , Adulto , Feminino , Humanos , Pancreatectomia , Reoperação , Resultado do TratamentoRESUMO
Introducción: El neumomediastino se define como la presencia de aires en el espacio mediastinito. Desde su introducción en la literatura por Hamman se ha podido determinar su origen en la lesión alveolar por barotrauma. Generalmente tiene un curso benigno afectando a hombres entre los 20-30 años de edad.Objetivo: Revisión bibliográfica y presentación de caso.Lugar de aplicación: Hospital polivalente de alta complejidad.Caso Clínico: Varón de 22 años que consulta por dolor en hemotórax derecho, alteración del tono de vos y enfisema subcutáneo cervical. Al examen físico se constata signo de Hamman. Se solicita radiografía de tórax haciéndose diagnóstico de neumomediastino. Se instaura tratamiento médico con buena evolución sin requerir tratamiento quirúrgico.Discusión: El neumomediastino es una patología poco frecuente de curso generalmente benigno. Su diagnóstico obliga a descartar otras causas como la perforación esofágica o lesión del árbol traqueobronquial. Su tratamiento implica medidas de sostén y en algunos casos oxígeno a altas dosis, reservando el tratamiento quirúrgico a las complicaciones como el taponamiento cardíaco o neumotórax hipertensivo.