Purpose: We assessed the proportion of patients with a focal intrahepatic stricture (FIHS) that was a precursor lesion or malignancy and visualized only as a duct dilatation.
Materials And Methods: This retrospective study assessed patients who underwent surgery or biopsy for an FIHS on CT or MRI between January 2010 and March 2022. The number and proportion of non-precursor benign lesions, precursors, and malignancies were calculated.
J Korean Soc Radiol
September 2024
Epithelioid hemangioma (EH) is an uncommon, benign vascular tumor of mesenchymal origin. It mainly presents as a tumor with a lytic appearance and septations. However, no case reports have documented the predominantly sclerotic appearance of EH.
View Article and Find Full Text PDFPurpose: This study aimed to compare the image quality and adverse events between Iopamidol 250 and Ioversol 320 usage during transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma (HCC).
Materials And Methods: Medical records and hepatic angiography from 113 patients who underwent TACE with Iopamidol 250 (44 patients) and Ioversol 320 (69 patients) were retrospectively reviewed. Vessel perception on hepatic angiography was graded into three categories by two radiologists for hepatic subsegmental arteries, the right gastroepiploic artery, right gastric artery, and pancreaticoduodenal artery.
The metaphyseal locations of tubular bones with osteoid mineralization in young patients are important diagnostic radiologic features of osteosarcoma. The pelvic bones are an unusual location of osteosarcoma. Although osteosarcoma occurring in pelvic bones is not common, the osteoid matrix may be a critical finding for differentiating osteosarcoma from other common pelvic bone tumors.
View Article and Find Full Text PDFMeniscus allograft transplantation has been performed over the past 25 years to relieve knee pain and improve knee function in patients with an irreparable meniscus injury. The efficacy and safety of meniscus allograft transplantation have been established in numerous experimental and clinical researches. However, there is a lack of reviews to aid radiologists who are routinely interpreting images and evaluating the outcome of the procedures, and also meniscus allograft transplantation is not widely performed in most hospitals.
View Article and Find Full Text PDFKnee Surg Sports Traumatol Arthrosc
October 2017
Purpose: To evaluate the correlation between indirect magnetic resonance (MR) arthrographic imaging findings and the clinical symptoms and prognosis of patients with frozen shoulder.
Methods: Indirect MR arthrography was performed for 52 patients with primary frozen shoulder (mean age 55.1 ± 9.
Background: To describe grayscale and color Doppler ultrasound features of subcutaneous intravascular papillary endothelial hyperplasia (IPEH).
Materials And Methods: The ultrasound appearances of ten histologically proven subcutaneous IPEH in ten patients (age range, 15-69 years; mean age, 38.2 years; six females, four males) were reviewed retrospectively by two musculoskeletal radiologists.
Purpose: The purpose of this study was to analyze factors affecting the treatment outcomes and prognoses of arthroscopic debridement for refractory lateral epicondylitis.
Methods: We included 45 patients who had undergone arthroscopic extensor carpi radialis brevis release for chronic refractory lateral epicondylitis between October 2008 and December 2012. Demographic data, magnetic resonance imaging studies, and arthroscopic findings were examined and analyzed.
Background: The estimation of anterior cruciate ligament (ACL) tear is required in certain cases involving legal and financial administration, such as the worker's compensation and/or insurance. The aim of this study is to propose and evaluate a quantitative evaluation instrument to estimate the chronicity of the ACL tear, based on the four magnetic resonance imaging (MRI) findings.
Methods: One hundred and fifty one cases of complete ACL tear confirmed by arthroscopy were divided into 4 groups according to the time from ACL injury to MRI acquisition: acute (< 6 weeks), subacute (6 weeks to 3 months), intermediate (3 months to 1 year), and chronic (> 1 year).
Objectives: The aim of this prospective study was to compare the painful subacromial gliding limitation of the supraspinatus tendon (SGLS) during dynamic ultrasonography, the features of magnetic resonance arthrography (MRA), and the maximum intra-articular injection volume to predict decreased joint capacity of the shoulder joint.
Methods: Between January 2003 and August 2011, 67 patients prospectively underwent ultrasonography including dynamic examination and MRA. Ultrasonography and ultrasonography-guided injection of contrast medium was performed before MRA, and each SGLSdU was compared with injected contrast volume, which was assumed as the maximum joint capacity and MRA features.
Purpose: The contact areas of the articular surfaces in the proximal radioulnar joint (PRUJ) change, depending on the rotational position of the forearm. We investigated the in vivo congruency index of the PRUJ and translational motion of the radial head relative to the lesser sigmoid notch with forearm rotation.
Methods: Computed tomography scans of 12 healthy adult elbows were obtained in 3 forearm positions: full supination, neutral, and full pronation.
Objective: The purpose of this article was to evaluate the radiologic findings of adult pelvis and appendicular skeletal Langerhans cell histiocytosis (LCH), emphasizing the CT and MR findings.
Materials And Methods: The images of nine patients with pathologically proven LCH (five men and four women; mean age, 37.11 years) were retrospectively reviewed.
We present a case of Non-Hodgkin's lymphoma involving medial clavicular head, which was initially diagnosed as Tietze syndrome. Non-Hodgkin's lymphoma arising from medial clavicular head is extremely rare, and CT, MRI findings have not been reported.
View Article and Find Full Text PDFVarious types of tumors can affect the subungual space, including benign solid tumors (glomus tumor, subungual exostosis, soft-tissue chondroma, keratoacanthoma, hemangioma, lobular capillary hemangioma), benign cystic lesions (epidermal and mucoid cysts), and malignant tumors (squamous cell carcinoma, malignant melanoma). Imaging plays an important role in the detection and differentiation of subungual tumors because of their small size, nonspecific clinical manifestations, and functional significance. Ultrasonography (US)-in particular, high-resolution US with color Doppler studies-provides useful information regarding tumor size, location, shape, and internal characteristics (cystic, solid, or mixed), but it is limited in the further characterization of tissue.
View Article and Find Full Text PDFPurpose: To quantify the articular surface area ratio of the radial head to the coronoid process to gain a better understanding of the stress distribution across these articulations and possibly to explain the patterns of osteoarthritis that are commonly seen in the elbow.
Methods: Thirty cadaveric elbows were harvested and dissected to allow measurement of the radial head and coronoid process articular surfaces. The articular surface areas were measured using the Image J program (National Institutes of Health, Chicago, IL).
In patients undergoing major orthopedic surgery, data of deep venous thrombosis (DVT) and pulmonary embolism (PE) are lacking as studied by computed tomographic (CT) pulmonary angiography and indirect CT venography (CTPA-CTV). A prospective observational study was performed for 363 Korean patients undergoing major orthopedic surgery to determine the incidence of venous thromboembolism (VTE), especially proximal DVT and PE. The incidence of VTE was 16.
View Article and Find Full Text PDFBackground: Several thyroid ultrasound (TUS) findings have been associated with an increased risk for thyroid cancer; however, there is no consensus as to the format and style for reporting the results of TUS. The objective of this study was to discover the features indicative of malignancy in thyroid nodules based on TUS, generate an equation using these features that would be predictive of malignancy in thyroid nodules, and stratify the results of this equation into TUS categories reflecting the probability of malignancy.
Methods: We obtained odds ratios of TUS findings indicative of malignancy and probability of malignancy for each nodule as determined by logistic regression analysis of ultrasound (US) findings in 1694 patients who had US-guided fine-needle aspiration biopsy.
Objective: This study was designed to present characteristic CT and MR findings of calcified spinal meningiomas that correlate with pathological findings and to assess the efficacy of CT for the detection of calcifications within a mass in comparison to MRI.
Materials And Methods: Between 1998 and 2009, 10 out of 11 patients who had pathologically confirmed psammomatous meningiomas showed gross calcifications on CT images and were included in this study. On CT scans of the 10 patients, the distribution pattern, morphology and number of calcifications within masses were evaluated.