Predictive Factors for Symptomatic Dislodgement of Percutaneous Transhepatic Biliary Drainage Catheter in Patients with Malignant Biliary Obstruction.

Purpose: To evaluate the factors that predict symptomatic dislodgement of a percutaneous transhepatic biliary drainage (PTBD) catheter in patients with malignant biliary obstruction.

Materials And Methods: This retrospective study included 572 patients with malignant biliary obstruction who underwent 733 PTBD catheter insertions between January 2010 and February 2015. The duration of catheter placement, approach site, location of the catheter tip, insertion angle, presence of a closed-loop pigtail, and tube diameter were evaluated.

Percutaneous radiologic gastrostomy with single gastropexy using balloon-assisted tract dilatation: comparison with peel-away sheath.

Purpose: To evaluate the safety and efficacy of percutaneous radiologic gastrostomy (PRG) with balloon-assisted tract dilatation (BATD) using a single gastropexy.

Methods: This retrospective study was approved by the institutional review board. From August 2018 to October 2022, 61 patients (53 male and 8 female, mean age 67 years, age range 27-90 years) underwent PRG with balloon-retained tubes for enteral nutrition.

Fluoroscopic Stent Placement as a Bridge to Surgery for Malignant Colorectal Obstruction: Short- and Long-Term Outcomes.

Purpose: To assess the outcomes of single-stage surgery following fluoroscopic stent placement for malignant colorectal obstruction.

Materials And Methods: This retrospective study included 46 patients (28 male and 18 female; mean age, 67.2 years) who had undergone fluoroscopic stent placement followed by laparoscopic resection ( = 31) or open surgery ( = 15) for malignant colorectal obstruction.

Clinical Efficacy of the Transradial Approach in Percutaneous Intervention for a Malfunctioning Arteriovenous Fistula.

Purpose: To evaluate the effectiveness of the transradial artery approach (TRA) for treating malfunctioning arteriovenous fistulas (AVFs) in patients on hemodialysis.

Materials And Methods: A retrospective analysis was conducted in this single-center study of TRA endovascular procedures in 73 patients (43 male and 30 female; mean age of 67.4 years (range, 42-92 years) with malfunctioning AVFs, between January 2008 and April 2019.

Usefulness of F-FDG PET/CT and Multiphase CT in the Differential Diagnosis of Hepatocellular Carcinoma and Combined Hepatocellular Carcinoma-Cholangiocarcinoma.

Purpose: The purpose of this study was to evaluate the usefulness of multiphasic CT and F-fluorodeoxyglucose (FDG) PET/CT for the differentiation of combined hepatocellular carcinomacholangiocarcinoma (cHCC-CCA) from hepatocellular carcinoma (HCC).

Materials And Methods: From January 2007 to April 2016, 93 patients with pathologically confirmed HCC ( = 84) or cHCC-CCA ( = 9) underwent CT and PET/CT imaging. Contrast enhancement patterns were divided into three types based on the attenuation of the surrounding liver parenchyma: type I (early arterial enhancement with delayed washout), type II (early arterial enhancement without delayed washout), and type III (early hypovascular, infiltrative appearance, or peripheral rim enhancement).

[Percutaneous Transgastric Stent Placement for Malignant Gastroduodenal Obstruction].

Purpose: To evaluate the technical feasibility and clinical efficacy of percutaneous transgastric stent placement after the failure of treatment attempt with the transoral approach in malignant gastroduodenal obstruction patients.

Materials And Methods: From October 2008 to April 2016, nine patients (M:F = 4:5; mean age = 66 years) with malignant gastroduodenal obstruction underwent stent placement via a gastrostomy tract, which was attributed to the failure of the transoral approach. The primary etiologies of the obstruction were pancreatic ( = 5), gastric ( = 2), and metastatic ( = 2) cancers.

Percutaneous Transcholecystic Removal of Common Bile Duct Stones: Case Series in 114 Patients.

Purpose To evaluate the safety and effectiveness of percutaneous transcholecystic removal of common bile duct (CBD) stones in 114 patients. Materials and Methods This retrospective study was approved by the institutional review board. From September 2011 through February 2017, 114 consecutive patients (68 men, 46 women; mean age, 73 years) underwent percutaneous transcholecystic removal of CBD stones.

Clinically intractable chronic unilateral hematuria: Successful treatment with renal segmental artery embolization.

Chronic unilateral hematuria (CUH) is characterized by intermittent or continuous gross hematuria that cannot be diagnosed using standard radiology and hematology. The authors report a case of CUH with no discrete lesion at ureteroscopy, successfully treated by selective renal artery embolization. Renal artery embolization could be a treatment option for selected patients with clinically intractable CUH.

Percutaneous transluminal forceps biopsy in patients suspected of having malignant biliary obstruction: factors influencing the outcomes of 271 patients.

Objectives: To evaluate predictive factors for false-negative diagnosis of percutaneous forceps biopsies in patients suspected of having a malignant biliary obstruction METHODS: Two hundred seventy one consecutive patients with obstructive jaundice underwent percutaneous forceps biopsy. In each patient, three to five specimens (mean, 3.5 specimens) were collected from the lesion.

Malignant Hilar Biliary Obstruction: Treatment by Means of Placement of a Newly Designed Y-Shaped Branched Covered Stent.

Purpose: To evaluate the technical feasibility and clinical efficacy of placement of a newly designed Y-shaped branched covered stent for palliative treatment of malignant hilar biliary obstruction.

Methods: From June 2011 to September 2014, 34 consecutive patients with malignant hilar biliary obstruction underwent percutaneous placement of a Y-shaped branched covered stent for palliative treatment. Technical and clinical success, complications, cumulative patient survival, and stent patency were evaluated.

Failed inferior vena cava filter retrieval by conventional method: Analysis of its causes and retrieval of it by modified double-loop technique.

Objectives: To evaluate the complications of the temporary implanted inferior vena cava (IVC) filter and the feasibility of double-loop technique for removal of complicated IVC filters.

Methods: From January 2012 to December 2013, a total of 25 patients with IVC filter were referred for IVC filter retrieval. There were 20 Celect®, 3 OptEase®, and 2 Günther-Tulip® filters.

Successful Chemotherapy Following Autologous Stem Cell Transplantation in Multiple Myeloma and Multi-organ Dysfunction with Infiltration of Eosinophils: A Case Report.

Eosinophils are derived from hematopoietic stem cells. Peripheral blood eosinophilia is defined as an absolute eosinophil count of ≥0.5×10(9)/L.

A prospective comparison of standard-dose CT enterography and 50% reduced-dose CT enterography with and without noise reduction for evaluating Crohn disease.

Objective: The purpose of this study was to prospectively compare standard-dose CT enterography (CTE) and 50% reduced-dose CTE, obtained with and without an image noise reduction method, in the evaluation of Crohn disease.

Subjects And Methods: Ninety-two patients (69 men and 23 women; mean age [± SD], 31.2 ± 9.

Transcatheter arterial embolization using ethanol in a dialysis patient for contracting enlarged polycystic kidneys.

The mass effect of nephromegaly in patients with autosomal dominant polycystic kidney disease may cause pain and symptoms by compressing the alimentary tract, lungs, and heart. Conventional therapies exist to contract enlarged polycystic kidneys including surgical and interventional procedures. A surgical nephrectomy is often difficult to perform in dialysis patients due to the associated risks related to surgery.

Peripheral pulmonary arterial pseudoaneurysms: therapeutic implications of endovascular treatment and angiographic classifications.

Purpose: To classify peripheral pulmonary arterial pseudoaneurysms (PAPs) associated with infectious lung diseases according to angiographic findings and to determine treatment options for PAPs on the basis of angiographic classifications.

Materials And Methods: The institutional review board approved this study. A total of 24 patients with massive hemoptysis had PAPs that were detected at pulmonary computed tomographic (CT) angiography; underlying diseases were pulmonary tuberculosis (n = 16), a fungus ball (n = 5), lung abscess (n = 2), and pneumonia (n = 1).

Double-layered PTFE-covered nitinol stents: experience in 32 patients with malignant esophageal strictures.

We evaluated the effectiveness of a double-layered polytetrafluoroethylene (PTFE)-covered nitinol stent in the palliative treatment of malignant esophageal strictures. A double-layered PTFE-covered nitinol stent was designed to reduce the propensity to migration of conventional covered stent. The stent consists of an inner PTFE-covered stent and an outer uncovered nitinol stent tube.

Anomalous bronchial artery originating from the right coronary artery in a patient with angina (2009: 4b).

Bronchial artery origins are subject to a wide range of anatomic variations, of which interventional radiologists should be aware. The authors report a patient with angina in whom an anomalous bronchial artery originated from the sinus node branch of the right coronary artery, causing a coronary steal phenomenon. The patient's symptom was successfully treated by transcatheter embolisation of the anomalous bronchial artery, which seems to be an effective alternative to surgery.

Anatomical variations of the popliteal artery and its tibial branches: analysis in 1242 extremities.

The purpose of this study was to analyze the variations in branching of the popliteal artery by reviewing femoral arteriograms. Between 2004 and 2006, digital subtraction angiographies of both lower extremities were performed in 621 patients. We reviewed these 1242 arteriograms retrospectively in order to analyze the branching pattern of the popliteal artery.

Stent-induced esophageal perforation: treatment by means of placing a second stent after removal of the original stent.

A case of esophageal perforation caused by a retrievable covered stent is presented. The distal end of the stent was protruding into the mediastinum, which made it impossible to negotiate a guidewire through the stent into the distal esophagus. The stent was successfully removed with use of a stent retrieval set, and esophageal perforation was treated with a second, covered stent with a good result.

Malignant duodenal obstructions: palliative treatment using self-expandable nitinol stents.

Purpose: To assess the efficacy of fluoroscopic per oral placement of self-expandable nitinol stents in the palliative treatment of malignant duodenal obstructions.

Materials And Methods: Under fluoroscopic guidance, 82 patients (56 male and 26 female; mean age, 62.3 y) with malignant duodenal obstructions were treated with per oral placement of four types of self-expandable nitinol stents.

Malignant tracheobronchial strictures: palliation with covered retrievable expandable nitinol stent.

Purpose: To evaluate the safety and clinical effectiveness of a covered retrievable expandable nitinol stent for the treatment of malignant tracheobronchial stricture and/or esophagorespiratory fistula (ERF).

Materials And Methods: With fluoroscopic guidance, stents were placed in 35 symptomatic patients with malignant tracheobronchial stricture and/or ERF in most cases caused by lung or esophageal cancer. The site of stricture was most commonly at the trachea or left main bronchus.

Bile duct: analysis of percutaneous transluminal forceps biopsy in 130 patients suspected of having malignant biliary obstruction.

Purpose: To evaluate percutaneous transluminal forceps biopsy in patients suspected of having a malignant biliary obstruction.

Materials And Methods: One hundred thirty consecutive patients (82 men and 48 women; mean age, 59 years) with obstructive jaundice underwent transluminal forceps biopsy during or after percutaneous transhepatic biliary drainage. The lesions involved the common bile duct (n = 58), common hepatic duct (n = 39), hilum (n = 14), ampullary segment of the common bile duct (n = 11), right or left intrahepatic bile duct (n = 5), or the entire extrahepatic bile duct (n = 3).

Malignant gastric outlet obstructions: treatment by means of coaxial placement of uncovered and covered expandable nitinol stents.

Purpose: To assess whether coaxial placement of uncovered and covered expandable nitinol stents overcomes the disadvantages of the increased migration rate seen with covered stents and the tumor ingrowth seen in uncovered stents in the treatment of malignant gastric outlet obstructions.

Materials And Methods: Two types of expandable nitinol stent were designed: an uncovered stent and a covered stent. Under fluoroscopic guidance, the uncovered and covered stents were placed coaxially with complete overlap in 39 consecutive patients with malignant gastric outlet obstruction caused by stomach cancer.