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Skeletal Radiology

Nathan Heineman, Avneesh Chhabra, Lihua Zhang, Riham Dessouky, Dane Wukich
BACKGROUND: The two most widely used measurements for diagnosing and assessing the severity of hallux valgus are the hallux valgus angle (HVA) and the intermetatarsal angle (IMA). Traditionally, these have been measured by using the midaxial lines approximating the axis of each bone. A new simpler point method has been recently suggested for measuring these angles by connecting points along the medial corners of each bone. Interreader reliability of these measurements on X-ray and MRI as well as intermethod and intermodality differences have not been assessed...
July 12, 2018: Skeletal Radiology
Aleksandr Rozenberg, Barry E Kenneally, John A Abraham, Kristin Strogus, Johannes B Roedl, William B Morrison, Adam C Zoga
OBJECTIVE: To determine factors that lead to significant discrepancies in second-opinion consultation of orthopedic oncology patients, and particularly if musculoskeletal fellowship training can decrease clinically significant discrepancies. METHODS: A PACS database was queried for secondary reads on outside cross-sectional imaging studies, as requested by orthopedic oncology from 2014 to 2017. Comparison of original and secondary reports was performed using a published seven-point scale that defines clinically significant discrepancies...
July 12, 2018: Skeletal Radiology
Michael L Richardson, Behrang Amini, Todd L Richards
PURPOSE: Magic angle effects (MAE) are well-recognized in musculoskeletal (MSK) MRI. With short TE acquisitions, the signal intensity of tendons, ligaments, and menisci depend on their orientation relative to the main magnetic field (B0 ). An interactive resident physics teaching module simulating MR imaging of a tendon forced us to identify and correct several misconceptions we had about MAE. We suspected these misconceptions were shared by other MSK radiologists. MATERIALS AND METHODS: We surveyed members of the Society of Academic Bone Radiologists (SABR) regarding which pulse sequences, acquisition parameters, tissues and angles relative to B0 were most likely to produce MAE...
July 11, 2018: Skeletal Radiology
Stephen M Broski, Andrew L Folpe, Doris E Wenger
OBJECTIVE: To examine the CT and MR imaging features of phosphaturic mesenchymal tumors (PMTs). MATERIALS AND METHODS: With IRB approval, our institutional radiology/pathology database was reviewed for pathologically-proven PMTs. CT and MRI examinations were reviewed in consensus noting several imaging features, and if available, comparative molecular imaging tests were analyzed. RESULTS: We identified 39 patients (21 male, 18 females) with 40 PMTs [mean age, 52...
July 9, 2018: Skeletal Radiology
Guillaume Bierry, William E Palmer
OBJECTIVE: To analyze full-thickness rotator cuff tears, compare retraction patterns in delaminated and nondelaminated tendons, and correlate retraction distances with anteroposterior tear lengths. MATERIALS AND METHODS: In 483 MR examinations reported as showing full-thickness cuff tear, two musculoskeletal radiologists independently characterized tendons as delaminated or nondelaminated. Tendon delamination was defined as either horizontal intra-substance splitting of bursal and articular layers by an intervening plane of fluid, or differential retraction of bursal and articular layers...
July 7, 2018: Skeletal Radiology
Umut Orkun Çelebi, Veysel Burulday, Mehmet Faik Özveren, Adil Doğan, Mehmet Hüseyin Akgül
OBJECTIVE: The aim of this study was to compare strain elastography (SE) and shear wave elastography (SWE) findings of the sciatic nerve in patients with unilateral lumbar disc herniation (LDH) and healthy control subjects. MATERIALS AND METHODS: The study group included patients with complaints of unilateral sciatica for 3-12 months, with foraminal stenosis due to one level of LDH (L4-L5 or L5-S1). An age- and gender-matched control group was formed of healthy subjects...
July 7, 2018: Skeletal Radiology
Nicholas M Beckmann, Michael Q Tran, Chunyan Cai
OBJECTIVE: To compare the incidence of rotator cuff tears on shoulder MRI in patients who have rotator cuff calcific tendinopathy with that in patients without calcific tendinopathy in a frequency-matched case-control study. MATERIALS AND METHODS: Retrospective review shoulder MRIs of 86 patients with rotator cuff calcific tendinopathy and an 86-patient age-, gender-, and laterality-matched control group using frequency matching. RESULTS: No statistically significant difference (odds ratio: 0...
July 7, 2018: Skeletal Radiology
K J D Steer, G P Bostick, L J Woodhouse, T T Nguyen, A Schankath, R G W Lambert, J L Jaremko
OBJECTIVES: Intra-articular steroid injection (IASI) is an effective therapy for hip osteoarthritis (OA), but carries risks and provides significant pain relief to only two thirds of patients. We attempted to predict response to IASI in hip OA patients using baseline clinical, ultrasound, and MRI data. METHODS: Observational study of 97 subjects with symptomatic hip OA presenting for IASI. At baseline and 8 weeks we obtained hip MRI, grayscale and Doppler ultrasound, clinical range of motion (ROM), timed-up and go test (TUG) scores, and self-reported Western Ontario and McMaster Universities Osteoarthritis (WOMAC) pain, stiffness, and function scores...
July 6, 2018: Skeletal Radiology
Shinji Tsukamoto, Maiko Takeda, Kanya Honoki, Shohei Omokawa, Yasuhito Tanaka
Malignant granular cell tumors are an extremely rare, high-grade sarcoma with a schwannian phenotype and are composed of malignant granular cells with cytoplasmic lysosomal inclusion. To date, 157 cases of malignant granular cell tumors have been reported. We report the first case of a malignant granular cell tumor arising from the digital nerve to the median nerve in the palm, and we review the 157 previously reported cases and summarize the clinical profile, treatment, and outcome of this tumor. The median age, tumor size, and follow-up periods were 51 years, 6 cm, and 24 months respectively...
July 6, 2018: Skeletal Radiology
Byeong Seong Kang, Hyun Seok Shim, Woon Jung Kwon, Soyeoun Lim, Gyeong Min Park, Tae Young Lee, Minseo Bang
OBJECTIVES: To analyze and identify magnetic resonance imaging (MRI) and clinical findings for the differentiation between infectious arthritis and spondyloarthritis in patients with unilateral sternoclavicular arthritis. MATERIALS AND METHODS: We retrospectively collected and evaluated the magnetic resonance (MR) images of 21 patients diagnosed with unilateral sternoclavicular arthritis, including 12 with infection and nine with spondyloarthritis, between 2004 and 2017...
July 5, 2018: Skeletal Radiology
Kyle R Duchman, Dayne T Mickelson, Barrett A Little, Thomas W Hash, Devin B Lemmex, Alison P Toth, Grant E Garrigues
Despite technical advances, repair of large or massive rotator cuff tears continues to demonstrate a relatively high rate of failure. Rotator cuff repair or superior capsular reconstruction (SCR) using a variety of commercially available grafts provides a promising option in patients with tears that may be at high risk for failure or otherwise considered irreparable. There are three major graft constructs that exist when utilizing graft in rotator cuff repair or reconstruction: augmentation at the rotator cuff footprint, bridging, and SCR...
July 5, 2018: Skeletal Radiology
Ursula Heilmeier, John Mbapte Wamba, Gabby B Joseph, Karin Darakananda, Jennifer Callan, Jan Neumann, Thomas M Link
OBJECTIVE: To evaluate if baseline pathological knee conditions as assessed via single features of the MR-based Whole-Organ Magnetic Resonance Imaging Scoring (WORMS), standard T2, and T2 gray-level co-occurrence matrix (GLCM) texture parameters of knee cartilage can serve as potential long-term radiological predictors of incident total knee arthroplasty (TKA) 4-7 years later. MATERIALS AND METHODS: Baseline 3-T knee MRIs of 309 subjects from the Osteoarthritis Initiative (n = 81 TKA cases, with right-knee TKA 4-7 years after enrolment, and n = 228 TKA-free matched controls) were evaluated for the presence and severity of pathological knee conditions via modified WORMS...
June 30, 2018: Skeletal Radiology
Kimia Khalatbari Kani, Jack A Porrino, Hyojeong Mulcahy, Felix S Chew
Proximal femoral fragility fractures are common and result in significant morbidity and mortality along with a considerable socioeconomic burden. The goals of this article are to review relevant proximal femoral anatomy together with imaging, classification, and management of proximal femoral fragility fractures, and their most common complications. Imaging plays an integral role in classification, management and follow-up of proximal femoral fragility fractures. Classification of proximal femoral fragility fractures is primarily based on anteroposterior hip radiographs...
June 29, 2018: Skeletal Radiology
Takaaki Urakawa, Yuki Tanaka, Shinichi Goto, Hitoshi Matsuzawa, Kei Watanabe, Naoto Endo
OBJECTIVE: To compare performances in diagnosing intertrochanteric hip fractures from proximal femoral radiographs between a convolutional neural network and orthopedic surgeons. MATERIALS AND METHODS: In total, 1773 patients were enrolled in this study. Hip plain radiographs from these patients were cropped to display only proximal fractured and non-fractured femurs. Images showing pseudarthrosis after femoral neck fracture and those showing artificial objects were excluded...
June 28, 2018: Skeletal Radiology
Sammy Tawk, Frédéric Lecouvet, Dan Constantin Putineanu, Souad Acid
We report the case of a 55-year-old male patient who presented to the emergency department after sustaining a right ankle trauma. Swelling and tenderness of the lateral aspect of the right ankle were present on physical examination without evidence of motor or sensory deficit. Ankle radiographs were performed and showed two bony fragments, the first located postero-inferiorly to the cuboid bone while the second was adjacent to the tip of the lateral malleolus. The diagnosis of an os peroneum fracture was made with high suspicion of an associated peroneus longus tendon rupture...
June 27, 2018: Skeletal Radiology
Maria Pilar Aparisi Gómez, Francisco Aparisi, Alberto Bazzocchi
No abstract text is available yet for this article.
June 27, 2018: Skeletal Radiology
Joe D Baal, Andrew E Horvai, Thomas M Link
Amyloidosis is the extracellular deposition of amyloid protein fibrils, and this condition may be hereditary or acquired. Patients undergoing long-term hemodialysis are particularly at risk for developing acquired amyloidosis. A rare form of amyloidosis is an amyloidoma or amyloid tumor, which occurs when amyloid focally deposits in a section of the musculoskeletal system, most commonly in the osteoarticular system. Here, we present a case of a hemodialysis-related amyloidoma of the left femoral neck in an 80-year-old woman with end-stage renal disease on hemodialysis for 8 years...
June 26, 2018: Skeletal Radiology
Maria Pilar Aparisi Gómez, Francisco Aparisi, Alberto Bazzocchi
No abstract text is available yet for this article.
June 25, 2018: Skeletal Radiology
Yujin Yeo, Joong Mo Ahn, Hyorin Kim, Yusuhn Kang, Eugene Lee, Joon Woo Lee, Heung Sik Kang
OBJECTIVE: To identify the findings on magnetic resonance imaging most strongly associated with meniscal ramp lesions in patients with an anterior cruciate ligament tear. SUBJECTS AND METHODS: Seventy-eight consecutive patients (mean age, 33.7 years; 64 male, 14 female) with an arthroscopically proven anterior cruciate ligament tear were included in this retrospective study. The presence of the following six features on magnetic resonance images were recorded: complete fluid filling between the posterior horn of the medial meniscus and the capsule margin; edema affecting the posterior capsule; irregularity of the medial meniscus at the posterior margin; fluid at the periphery of the medial meniscus; the corner notch sign; and a vertical tear at the medial meniscus...
June 24, 2018: Skeletal Radiology
Neil M Kumar, Shivani Ahlawat, Laura M Fayad
OBJECTIVE: To determine the threshold signal drop on 3-T chemical shift imaging (CSI), with in-phase (IP) and opposed-phase (OP) sequences, for accurately identifying bone marrow replacement with 100% sensitivity, and determine a clinically useful measurement method for deriving such a threshold. MATERIALS AND METHODS: From a convenience series of 157 MRIs, 36 cases with histologically proven marrow-replacing lesions and 22 sites of red marrow (histologically proven (2) or with minimum 6-month stability) with 3-Tesla CSI were included...
June 23, 2018: Skeletal Radiology
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