D. Gwon

Early posttransplant hepatic venous outflow obstruction: Long‐term efficacy of primary stent placement

Although balloon angioplasty has been accepted as the safe and effective initial treatment to manage hepatic venous outflow abnormalities, it may induce rupture of the fresh anastomosis but also may be ineffective to eliminate various etiologies of venous outflow abnormalities in the early post‐transplant period. Therefore, we performed primary stent placement in 108 patients to treat early‐onset (≤4 weeks) post‐transplant hepatic venous outflow abnormality. The following parameters were documented retrospectively: technical success and complications: clinical success; recurrence; and patency of stent‐inserted hepatic veins.

Bile leak following living donor liver transplantation: Clinical efficacy of percutaneous transhepatic treatment

Percutaneous transhepatic treatment may be effective in patients with bile leaks after living donor liver transplantation (LDLT). We therefore evaluated the clinical efficacy of percutaneous transhepatic treatment for biliary leaks in adult‐to‐adult LDLT recipients. Twenty‐three LDLT recipients underwent percutaneous transhepatic treatment to manage bile leaks. The treatment included percutaneous transhepatic biliary drainage (PTBD) and drainage of perihepatic biloma. In patients with combined biliary strictures, balloon dilation was usually performed. Indications for PTBD included patients who had a Roux‐en‐Y hepaticojejunostomy (n = 9), failed endoscopic cannulation of bile ducts (n = 6), a bile leak refractory to endoscopic management (n = 5), and a poor general condition for endoscopic management (n = 3). Clinical success was achieved in 16 of 23 (70%) patients. PTBD catheters were removed from 14 of the 16 patients with clinical success at a median of 8 months (range, 3‐42 months) after initial PTBD. Aside from 1 patient with intrahepatic pseudoaneurysms, there were no major complications. During a median follow‐up period of 42 months (range, 3.0‐84 months), 6 (43%) of the 14 patients who underwent PTBD catheter removal experienced jaundice or cholangitis due to biliary anastomotic stricture at a median of 26 months (range, 22‐49 months) after PTBD catheter removal. In conclusion, percutaneous transhepatic treatment for biliary leaks in adult‐to‐adult LDLT recipients is clinically effective. This approach is a valuable alternative for treating bile leaks resistant to or inaccessible by endoscopic methods. However, further investigations are needed to minimize the duration of treatment and biliary strictures following PTBD catheter removal. Liver Transpl 14:1142–1149, 2008.

Percutaneous transhepatic treatment of hepaticojejunal anastomotic biliary strictures after living donor liver transplantation

Endoscopic treatment has largely replaced surgery as the initial treatment for biliary strictures following living donor liver transplantation; however, this treatment is nearly impossible in patients who have previously undergone hepaticojejunostomy (HJ). We therefore retrospectively evaluated the efficacy of percutaneous transhepatic treatment in patients who developed HJ strictures following living donor liver transplantation. Percutaneous transhepatic biliary drainage and subsequent balloon dilation of biliary strictures were performed on 83 patients. Serial exchanges of drainage tubes with larger diameters up to 14 Fr were performed at 4‐week intervals. Drainage tubes were removed if follow‐up cholangiography revealed fluent passage of the contrast medium without recurrence of symptoms or changes in the biochemical findings. The clinical outcome, tube independence rate, and patency rate following drainage tube removal were retrospectively evaluated. Except for 2 patients who had failed negotiation of biliary strictures, clinical success was achieved in all 81 patients following percutaneous transhepatic treatment, and the drainage tubes were removed from 76 (93.8%) of these 81 patients. Tubes were removed 11.2 ± 7.4 months after initial percutaneous transhepatic biliary drainage. The recurrence rate at a mean of 36.0 ± 26.2 months following drainage tube removal was 15.8%. One‐ and three‐year primary patency rates were 95.3% ± 2.7% and 80.9% ± 5.2%, respectively. In conclusion, percutaneous transhepatic treatment is an effective alternative treatment for HJ strictures following living donor liver transplantation. However, further research will be required in order to minimize the duration of treatment and the stricture recurrence rate following tube removal. Liver Transpl 14:1323–1332, 2008.

Efficacy of Prophylactic Uterine Artery Embolization before Obstetrical Procedures with High Risk for Massive Bleeding

Objective To evaluate the safety and efficacy of prophylactic uterine artery embolization (UAE) before obstetrical procedures with high risk for massive bleeding. Materials and Methods A retrospective review of 29 female patients who underwent prophylactic UAE from June 2009 to February 2014 was performed. Indications for prophylactic UAE were as follows: dilatation and curettage (D&C) associated with ectopic pregnancy (cesarean scar pregnancy, n = 9; cervical pregnancy, n = 6), termination of pregnancy with abnormal placentation (placenta previa, n = 8), D&C for retained placenta with vascularity (n = 5), and D&C for suspected gestational trophoblastic disease (n = 1). Their medical records were reviewed to evaluate the safety and efficacy of UAE. Results All women received successful bilateral prophylactic UAE followed by D&C with preservation of the uterus. In all patients, UAE followed by obstetrical procedure prevented significant vaginal bleeding on gynecologic examination. There was no major complication related to UAE. Vaginal spotting continued for 3 months in three cases. Although oligomenorrhea continued for six months in one patient, normal menstruation resumed in all patients afterwards. During follow-up, four had subsequent successful natural pregnancies. Spontaneous abortion occurred in one of them during the first trimester. Conclusion Prophylactic UAE before an obstetrical procedure in patients with high risk of bleeding or symptomatic bleeding may be a safe and effective way to manage or prevent serious bleeding, especially for women who wish to preserve their fertility.

Portal Vein Thrombosis after Endovascular Embolization of Splenic Artery for a Symptomatic Arterioportal Fistula: A Case Report and Literature Review

Arterioportal fistula (APF) can induce severe portal hypertension and therefore requires appropriate and timely management. Endovascular treatment is increasingly used for the treatment of APFs due to its minimally invasive nature, although this procedure can lead to potentially fatal portal vein thrombosis (PVT). Reports of this complication are, however, rare. Here, we describe the case of a 65-year-old woman who experienced an extensive thrombosis from the splenic vein to the right portal vein after embolization of a splenic APF, leading to the requirement for intensive care unit care and a prolonged hospital stay. In addition, the literature was reviewed to describe the clinical manifestations, diagnosis, and treatment of PVT after embolization of APF.