Accuracy of preoperative T2 gallbladder tumor localization and the adequate surgical resection.

Introduction: The agreement between the radiologic and histopathologic tumor locations in T2 gallbladder cancer is critical. There is no consensus regarding the extent of curative resection by tumor locations.

Methods: Between January 2010 and December 2019, a consecutive series of 118 patients with pathological T2 gallbladder cancer who underwent surgery were retrospectively analyzed in terms of the accordance between radiologic and histopathologic tumor locations, the extents of hepatic resection and the numbers of harvested lymph nodes.

CT-quantified muscle and fat change in patients after surgery or endoscopic resection for early gastric cancer and its impact on long-term outcomes.

The purpose of this study was to evaluate the impact of the body composition changes on patients' long-term outcomes after endoscopic resection or surgery for mucosal gastric cancer.This case-control study included 96 patients who underwent endoscopic resection or surgery after propensity score matching. Areas of fat and muscle measured on CT were compared between the 2 groups.

The Role of Endoscopic Ultrasonography and Magnetic Resonance Cholangiopancreatography in Patients With Acute Pancreatitis After Negative Computed Tomography Findings of the Etiology.

Objectives: We aimed to investigate the roles of endoscopic ultrasonography (EUS) and magnetic resonance cholangiopancreatography (MRCP) in detecting the causes of acute pancreatitis after negative computed tomography (CT) findings.

Methods: Demographic characteristics, blood test results, the severity of pancreatitis, and definite or possible etiology of pancreatitis by EUS and MRCP were evaluated prospectively in 65 consecutively admitted patients after negative CT findings.

Results: Endoscopic ultrasonography and/or MRCP confirmed the definite causes of pancreatitis in 47.

Prediction of KRAS Mutation in Rectal Cancer Using MRI.

Aim: The purpose of the study was to investigate imaging predictors of Kirsten-ras (KRAS) mutations using magnetic resonance imaging (MRI) in patients with rectal cancer.

Patients And Methods: A total of 275 patients with rectal cancer were enrolled. They underwent pretreatment rectal MRI, and then KRAS mutation evaluation following surgery.

Efficiency of Non-Contrast-Enhanced Liver Imaging Sequences Added to Initial Rectal MRI in Rectal Cancer Patients.

Purpose: The purpose of this study was to estimate the value of addition of liver imaging to initial rectal magnetic resonance imaging (MRI) for detection of liver metastasis and evaluate imaging predictors of a high risk of liver metastasis on rectal MRI.

Methods: We enrolled 144 patients who from October 2010 to May 2013 underwent rectal MRI with T2-weighted imaging (T2WI) and diffusion-weighted imaging (DWI) (b values = 50, 500, and 900 s/mm2) of the liver and abdominopelvic computed tomography (APCT) for the initial staging of rectal cancer. Two reviewers scored the possibility of liver metastasis on different sets of liver images (T2WI, DWI, and combined T2WI and DWI) and APCT and reached a conclusion by consensus for different analytic results.

Primary mesenteric carcinoid tumor.

Primary mesenteric carcinoid tumor is very rare, although secondary mesenteric involvement is common, reported as 40% to 80%. And distant metastasis rate reported as 80% to 90%, when the size is larger than 2 cm. We present a case of very rare primary mesenteric carcinoid tumor showing benign character though large size.

The value of T2*-weighted gradient-echo MRI for the diagnosis of cerebral venous sinus thrombosis.

Objectives: The purpose of this study is to compare the various magnetic resonance imaging (MRI) sequences when they are used to visualize and evaluate cerebral venous thrombosis.

Methods: Eleven patients with cerebral venous thrombosis were retrospectively analyzed using computed tomography, MRI, magnetic resonance angiography (MRA), and conventional angiography. The MR sequence included T1-weighted spin echo (SE) imaging, obtained before and after administration of contrast medium, T2-weighted turbo spin echo (TSE), fluid-attenuated inversion recovery (FLAIR), T2*-weighted conventional gradient-echo (GRE), as well as three-dimensional (3D) venous time-of-flight MRA and conventional angiography.

Image quality improvement after implementation of a CT accreditation program.

Objective: The purpose of this study was to evaluate any improvement in the quality of abdominal CTs after the utilization of the nationally based accreditation program.

Materials And Methods: Approval was obtained from the Institutional Review Board, and informed consent was waived. We retrospectively analyzed 1,011 outside abdominal CTs, from 2003 to 2007.

Entrapped inferior vena cava between 2 lumbar vertebrae.

Inferior vena cava (IVC) obstruction can have several underlying causes, and its clinical symptoms vary. Although there are several reported cases of traumatic jejunal entrapment between 2 vertebral bodies, there is no report of intervertebral IVC entrapment causing partial IVC obstruction. We present the first case of IVC entrapment between 2 vertebral bodies caused by compression fracture of the lumbar spines combined with an injured anterior longitudinal ligament.

Cavernous mesenteric lymphangiomatosis mimicking metastasis in a patient with rectal cancer: a case report.

Lymphangioma usually occurs in children and usually involves the skin. Mesenteric lymphangioma is extremely rare in adults. Typically, lymphangioma appears on computed tomography (CT) as a lower attenuation of a cystic mass, however, some cases appear to be a solid mass.

Diffuse hepatic hemangiomatosis without extrahepatic involvement in an adult patient.

We report an extremely rare case of a diffuse hepatic hemangiomatosis without extrahepatic involvement in an adult. The imaging findings of this tumor were similar to those of a hepatic hemangioma and included contrast enhancement with a centripetal filling pattern of the entire hepatic tumor on the delayed phase of a dynamic CT and inhomogeneous diffuse uptake of the entire tumor on blood-pool images obtained five hours later on a 99mTc-labeled red blood cell scan. Despite its rarity, diffuse hepatic hemangiomatosis can be suggested in adult patients with diffusely involved hepatic tumors showing the radiological findings of a hepatic hemangioma.

Ischemic colitis due to obstruction of mesenteric and splenic veins: a case report.

Ischemic injury to the bowel is a well known disease entity that has a wide spectrum of pathological and clinical findings. A sudden drop in the colonic blood supply is essential to its development. We encountered a 41-year-old male patient, who presented with abdominal pain and bloody diarrhea.

Acute Marchiafava-Bignami disease: diffusion-weighted MRI in cortical and callosal involvement.

Marchiafava-Bignami disease (MBD) is a fatal disorder characterized by demyelination of the corpus callosum. MRI, suggestive of corpus callosum demyelination with associated white matter involvement in both cerebral hemispheres, indicates a diagnosis of MBD. In this case, MR diffusion-weighted findings taken at an acute stage of MBD revealed lesions not only in the corpus callosum but also in the cerebral cortex.

Eccrine acrospiroma of inguinal area: Computed tomography findings.

Eccrine acrospiroma is a tumor originating from the sweat glands. The computed tomography findings of eccrine acrospiroma in the right inguinal area are presented. In our case, the tumor was seen as a well-defined and ovoid-shaped cystic mass with an internal enhancing solid portion and containing calcifications.

Researcher contributions and fulfillment of ICMJE authorship criteria: analysis of author contribution lists in research articles with multiple authors published in radiology. International Committee of Medical Journal Editors.

Purpose: To determine the number of researchers who fulfill the International Committee of Medical Journal Editors (ICMJE) authorship criteria and to evaluate individual contributions.

Materials And Methods: The author contribution lists of Radiology articles published between 1998 and 2000 with at least three authors were reviewed. The fulfillment of ICMJE criteria for authorship and the contribution percentage were assessed according to each researcher's position in the byline and nationality (American vs international), number of researchers per article, and year of publication.