Evaluation of treatment response by multiparametric MR imaging in locally advanced rectal tumors following neoadjuvant chemotherapy.

Purpose: To investigate the effectiveness of multiparametric MRI examination in determining tumor response after neoadjuvant chemoradiotherapy (CRT) in locally advanced rectal tumors.

Methods: 46 patients with locally advanced rectal adenocarcinoma were included and were divided into two groups as complete responders and nonresponders based on Mandard score. On MRI, relative T2w signal intensity and ADC values obtained before and after treatment and tumour volumes in dynamic contrast enhanced images (DCI) were used to determine complete response to treatment.

Evaluation of abdominal computed tomography findings in patients with COVID-19: a multicenter study.

Purpose: To evaluate the frequency of abdominal computed tomography (CT) findings in patients with coronavirus disease-2019 (COVID-19) and interrogate the relationship between abdominal CT findings and patient demographic features, clinical findings, and laboratory test results as well as the CT atherosclerosis score in the abdominal aorta.

Methods: This study was designed as a multicenter retrospective study. The abdominal CT findings of 1.

Intraoperative Ultrasound Can Facilitate Laparoscopic Partial Nephrectomy in Adherent Perinephric Fat.

Adherent perinephric fat (APF) is one of the challenging factors of laparoscopic partial nephrectomy (LPN). The aim of this study was to investigate the effect of intraoperative laparoscopic ultrasound (ILUS) on determining renal tumor localization and dissection in patients with APF who underwent LPN. Prospectively collected data from 517 patients who underwent LPN from October 2010 to September 2020 in tertiary university hospital were evaluated retrospectively.

Laparoscopic resection of retroperitoneal bronchogenic cyst clinically presenting like adrenal cyst.

Bronchogenic cyst that is localized to retroperitoneum is a rare clinical entity. It is a congenital malformation generally occuring in the posterior mediastinum due to abnormal development of the foregut. We report the case of a retroperitoneal cyst presented like left adrenal cyst.

Discrimination of papillary renal cell carcinoma from benign proteinaceous cyst based on iodine and water content on rapid kV-switching dual-energy CT.

Purpose: We aimed to evaluate whether rapid kV-switching dual energy CT (rsDECT) can discriminate between papillary renal cell carcinoma (RCC) and benign proteinaceous cysts (BPCs) based on iodine and water content.

Methods: Twenty-four patients with histopathologically proven papillary RCC and 38 patients with 41 BPCs were retrospectively included. Patients with BPCs were eligible for inclusion when the cysts were stable in size and appearance for at least 2 years or proved to be a cyst on ultrasound or MRI.

Compatibility of true and virtual unenhanced attenuation in rapid kV-switching dual energy CT.

Purpose: We aimed to evaluate whether virtual unenhanced images (VUI) generated from nephrographic phase on rapid kV-switching dual energy CT (rsDECT) can replace true unenhanced images (TUI) by comparing attenuation values of various intraabdominal structures.

Methods: In this retrospective study, 142 patients had unenhanced and nephrographic phase dual energy CT images. Attenuation values of the aorta, liver,spleen, pancreas, bilateral renal parenchyma, inferior vena cava, gallbladder and paraspinal muscle on TUI and VUI were recorded.

Percutaneous Coronary Intervention for Coronary Arteries with Origin and Course Anomalies: Case Reports and Literature Review.

Coronary artery anomalies (CAAs) are defined as variants of normal epicardial coronary arteries. They are mostly detected incidentally during coronary angiography. Clinical studies have shown that abnormal origins and courses of coronary arteries make them more prone to atherosclerosis.

Is gynecomastia related to the disease characteristics and prognosis in testicular germ cell tumor patients?

Purpose: We aimed to assess the relationship between gynecomastia and tumor markers, histologic subtypes, and prognosis in patients with testicular germ cell tumors.

Methods: This study included 73 testicular germ cell cancer patients with pretreatment chest, abdomen and pelvis computed tomography (CT) scans and tumor markers (β-human chorionic gonadotropin [β-hCG], lactate dehydrogenase [LDH], α-fetoprotein [AFP]). The volumetric analysis of the breast glandular tissue, the presence of gynecomastia and metastatic disease were determined using CT scans.

Discrimination of oncocytoma and chromophobe renal cell carcinoma using MRI.

Purpose: We aimed to evaluate magnetic resonance imaging (MRI) features, including signal intensities, enhancement patterns and T2 signal intensity ratios to differentiate oncocytoma from chromophobe renal cell carcinoma (RCC).

Methods: This retrospective study included 17 patients with oncocytoma and 33 patients with chromophobe RCC who underwent dynamic MRI. Two radiologists independently reviewed images blinded to pathology.

Usefulness of rapid kV-switching dual energy CT in renal tumor characterization.

Purpose: To investigate whether iodine content can discriminate between benign or malignant renal tumors, malign tumor subtypes, low-grade and high-grade tumors on rapid kv-switching dual-energy CT (rsDECT).

Methods: This prospective study enrolled 95 patients with renal tumors who underwent rsDECT for tumor characterization between 2016 and 2018. Attenuation on true and virtual unenhanced images, absolute enhancement and enhancement ratio and iodine content of each lesion on nephrographic phase iodine density images were measured.

Two-dimensional shear wave elastography of the perirenal fat: Can sticky fat be predicted?

Purpose: To evaluate whether two-dimensional (2D) shear wave elastography (SWE) can predict the presence of perirenal sticky fat (PSF) by showing increased perirenal fat stiffness.

Methods: We prospectively enrolled 28 patients with 31 renal tumors and 10 donor cases. Conventional renal ultrasound (US) and 2D-SWE examination of the perirenal fat were performed.

Laparoscopic resection of retroperitoneal bronchogenic cyst clinically presenting as adrenal cyst.

Bronchogenic cyst localized in the retroperitoneum is a rare clinical entity. It is a congenital malformation generally occurring in the posterior mediastinum due to the abnormal development of the foregut. We report the case of a retroperitoneal cyst presenting as left adrenal cyst.

Efficacy of perfusion CT in differentiating of pancreatic ductal adenocarcinoma from mass-forming chronic pancreatitis and characterization of isoattenuating pancreatic lesions.

Purpose: Multidetector computed tomography (MDCT) is routinely used in the diagnosis of pancreatic ductal adenocarcinoma (PDAC), but it may be inadequate in some cases, especially mass-forming chronic pancreatitis (MFCP) and isoattenuating pancreatic lesions. Perfusion CT (pCT) may help resolve this problem. The aim of this study was to evaluate whether pCT could help differentiating PDAC from MFCP and in characterization of isoattenuating pancreatic lesions.

Lower energy levels and iodine-based material decomposition images increase pancreatic ductal adenocarcinoma conspicuity on rapid kV-switching dual-energy CT.

Purpose: Multidetector computed tomography (MDCT) is used in the diagnosis of pancreatic ductal adenocarcinoma (PDAC), but it may be inadequate in some cases. Tumor detection can be improved using rapid kV-switching dual-energy CT (rsDECT) and iodine maps. Our aim this study is to evaluate tumor conspicuity in PDAC cases using rsDECT and iodine maps.

A rare cause of acute abdomen in the ED: Chemotherapy-induced pneumatosis intestinalis.

Pneumatosis intestinalis (PI) and portomesenteric venous gas (PVG) refers to the presence of air within the intestinal wall and portomesenteric vessels. Most of the time, it is associated with mesenteric ischemia that requires immediate surgical intervention as it has high mortality rate. It may also be seen secondary to various conditions, including infections, surgeries, and some chemotherapeutic drugs.

Acoustic Radiation Force Impulse Elastography in Determining the Effects of Type 1 Diabetes on Pancreas and Kidney Elasticity in Children.

Objective: The aim of this study is to determine the effects of type 1 diabetes on pancreas and kidney elasticity in children, using acoustic radiation force impulse ultrasound elastography.

Subjects And Methods: Sixty autoantibody-positive patients with type 1 diabetes (45% girls; mean [± SD] age, 11.7 ± 4.

Single center experience with intralesional bleomycin sclerotherapy for lymphatic malformations.

Purpose: The purpose of our study was to evaluate the efficacy of percutaneous sclerotherapy using bleomycin in treatment of lymphatic malformations.

Methods: Between January 2009 and January 2013, ten patients with lymphatic malformations who were admitted to the interventional radiology department were included in this retrospective study. Intralesional bleomycin was administered by percutaneous injection through 21-23 Gauge needles with a dose of 1 mg/kg body weight.

Atypical Unilateral Posterior Reversible Encephalopathy Syndrome Mimicking a Middle Cerebral Artery Infarction.

Posterior reversible encephalopathy syndrome (PRES) is usually a reversible clinical and radiological entity associated with typical features on brain MR or CT imaging. However, the not-so-uncommon atypical radiological presentations of the condition are also present and they may go unrecognised as they are confused with other conditions. Here, we report a very rare case of atypical, unilateral PRES in a 49-year-old uremic, post-transplant female patient who presented with seizures.

Cholangiocarcinoma Arising from a Type VI Biliary Cyst: A Case Report and Review of the Literature.

Cystic dilatations of the cystic duct which are suggested as type VI biliary cysts are very rare and many of them go unrecognized or are confused with other cysts until the operation although they are obvious on imaging studies. They can present with fusiform or saccular dilatations and can be accompanied by common bile duct dilatations. It is important to identify these cysts as they share the same characteristics as the other biliary cyst types and can be complicated with malignancy.

Volumetric analysis of the subthalamic and red nuclei based on magnetic resonance imaging in patients with Parkinson's disease.

Parkinson's disease (PD) is associated with degeneration of the dopaminergic neurons in the substantia nigra. The subthalamic nucleus (STN) plays a pivotal role in the pathogenesis. However, there is not much known about the morphological changes in the STN.