Pseudoendocrine sarcoma: a rare new entity with unique radiologic and pathologic/molecular characteristics.

Pseudoendocrine sarcoma is a rare, recently described intermediate grade sarcoma of uncertain phenotype that most commonly affects the paraspinal location in older patients with a distinctive endocrine/paraganglioma-like morphology and unique CTNNB1 point mutation. While these tumors appear as epithelial or even benign endocrine tumors, these lack markers for such and are highlighted by nuclear expression of beta-catenin. This case is the first among the previously reported only twenty-five cases of this entity, including one original series and a few case reports, to correlate the radiologic imaging with the pathologic features. Furthermore, this case illustrates the oldest-to-date patient with this unique location as a palpable painful chest wall/paraspinal location, with new morphologic observations and, finally, this is only the second case to have this specific CTNNB1 hotspot point mutation for this rare entity.

Bone Tumor Risk Stratification and Management System: A Consensus Guideline from the ACR Bone Reporting and Data System Committee.

The assessment and subsequent management of a potentially neoplastic bone lesion seen at diagnostic radiography is often complicated by diagnostic uncertainty and inconsistent management recommendations. Appropriate clinical management should be directed by risk of malignancy. Herein, the ACR-sponsored Bone Reporting and Data System (Bone-RADS) Committee, consisting of academic leaders in the fields of musculoskeletal oncology imaging and orthopedic oncology, presents the novel Bone-RADS scoring system to aid in risk assignment and provide risk-aligned management suggestions. When viewed in the proper clinical context, a newly identified bone lesion can be risk stratified as having very low, low, intermediate, or high risk of malignancy. Radiographic features predictive of risk are reviewed include margination, pattern of periosteal reaction, depth of endosteal erosion, pathological fracture, and extra-osseous soft tissue mass. Other radiographic features predictive of histopathology are also briefly discussed. To apply the Bone-RADS scoring system to a potentially neoplastic bone lesion, radiographic features predictive of risk are each given a point value. Point values are summed to yield a point total, which can be translated to a Bone-RADS score (1-4) with corresponding risk assignment (very low, low, intermediate, high). For each score, evidence-based and best practice consensus management suggestions are outlined. Examples of each Bone-RADS scores are presented, and a standardized diagnostic radiography report template is provided.

Redesign of the American Board of Radiology Diagnostic Radiology Certifying Examination.

On April 13, 2023, the American Board of Radiology (ABR) announced plans to replace the current computer-based diagnostic radiology (DR) certifying examination with a new oral examination to be administered remotely, beginning in 2028. This article describes the planned changes and the process that led to those changes. In keeping with its commitment to continuous improvement, the ABR gathered input regarding the DR initial certification process. Respondents generally agreed that the qualifying (core) examination was satisfactory but expressed concerns regarding the computer-based certifying examination's effectiveness and impact on training. Examination redesign was conducted using input from key groups with a goal of effectively evaluating competence and incentivizing study behaviors that best prepare candidates for radiology practice. Major design elements included examination structure, breadth and depth of content, and timing. The new oral examination will focus on critical findings as well as common and important diagnoses routinely encountered in all diagnostic specialties, including radiology procedures. Candidates will first be eligible for the examination in the calendar year after residency graduation. Additional details will be finalized and announced in coming years. The ABR will continue to engage with interested parties throughout the implementation process.

Radiology Training Program Lessons Learned During the COVID-19 Pandemic.

The COVID-19 pandemic had major effects on radiology training programs throughout the country. Many of the challenges were shared, with some variation depending on the size and geographic location of each program. While some initial modifications, such as platoon-type scheduling and redeployment, have been abandoned, other changes such as home workstations and the option of remote conferences have become more permanently incorporated. Remote learning tools and virtual teaching are much more frequently used, although there is emphasis by many programs on preserving in-person training. Programs stressed the importance of communication and adaptability, and getting resident and faculty input is key in optimizing the educational experience.

Diagnostic errors in musculoskeletal oncology and possible mitigation strategies.

The objective of this paper is to explore sources of diagnostic error in musculoskeletal oncology and potential strategies for mitigating them using case examples. As musculoskeletal tumors are often obvious, the diagnostic errors in musculoskeletal oncology are frequently cognitive. In our experience, the most encountered cognitive biases in musculoskeletal oncologic imaging are as follows: (1) anchoring bias, (2) premature closure, (3) hindsight bias, (4) availability bias, and (5) alliterative bias. Anchoring bias results from failing to adjust an early impression despite receiving additional contrary information. Premature closure is the cognitive equivalent of "satisfaction of search." Hindsight bias occurs when we retrospectively overestimate the likelihood of correctly interpreting the examination prospectively. In availability bias, the radiologist judges the probability of a diagnosis based on which diagnosis is most easily recalled. Finally, alliterative bias occurs when a prior radiologist's impression overly influences the diagnostic thinking of another radiologist on a subsequent exam. In addition to cognitive biases, it is also important for radiologists to acknowledge their feelings when making a diagnosis to recognize positive and negative impact of affect on decision making. While errors decrease with radiologist experience, the lack of application of medical knowledge is often the primary source of error rather than a deficiency of knowledge, emphasizing the need to foster clinical reasoning skills and assist cognition. Possible solutions for reducing error exist at both the individual and the system level and include (1) improvement in knowledge and experience, (2) improvement in clinical reasoning and decision-making skills, and (3) improvement in assisting cognition.

Rib hyperostosis: a benign entity with suspicious imaging features.

Rib hyperostosis has previously been described in conjunction with disorders causing excessive vertebral ossification due to osseous bridging across the costovertebral joint, such as in diffuse idiopathic skeletal hyperostosis. Hyperostosis is believed to be a reactive process due to altered forces across the affected rib as bridging osteophytes decrease mobility at the respective costovertebral joint. The imaging characteristics of rib hyperostosis can be highly suspicious for malignancy. We share 2 cases of biopsy-proven benign rib hyperostosis with imaging across multiple modalities in hopes of increasing awareness of this entity and its imaging characteristics. In the first case, a 62-year-old female without history of malignancy underwent rib biopsy after bone scintigraphy demonstrated intense radiotracer uptake along a posteromedial rib. In the second case, a 66-year-old male with history of recurrent prostate cancer underwent rib biopsy after interval development of intense radiotracer uptake on bone scintigraphy along a posteromedial rib, new compared to 6 months prior. Both cases were seen in the setting of osseous bridging at the respective costovertebral joint. Imaging findings include contiguous radiotracer uptake on bone scintigraphy confined to the rib and respective costovertebral joint, cortical bone thickening with osseous excrescence at the costovertebral joint on radiographic and cross-sectional imaging, and increased osseous edema-like change, postcontrast enhancement, and surrounding soft tissue edema on magnetic resonance imaging. By increasing awareness to these imaging features, we hope to improve diagnostic confidence and decrease unnecessary, expensive, and sometimes invasive workup for future patients.

Cervical Dystonia Caused by Chronic Nonunion C2 Fracture: A Case Report.

Chronic nonunion cervical fracture leading to cervical dystonia (CD) is very rare. This study reports a 72-year-old man who presented with 9-month history of progressively worsening neck tilting, neck tightness, neck pain, headache, and difficulty with swallowing. The patient was referred to speech therapy and confirmed to have dysphagia on modified barium swallow study. A cervical spine radiograph showed a chronic C2 nonunion fracture. Subsequent cervical spine magnetic resonance imaging confirmed chronic C2 nonunion fracture with kyphotic deformity of the cervical canal with associated cord compression at C1-C2 and severe central canal stenosis. Needle electromyography revealed dystonic or spasmodic neck muscles, consistent with diagnosis of CD. Botulinum toxin injection resulted in marked clinical improvement. The patient finally underwent occipital to C4 posterior segmental fusion. No recurrence of CD had occurred 12 months after botulinum toxin injection and surgery, which supports the conclusion that chronic C2 nonunion fracture is most likely responsible for CD in this case. The authors suggest that all patients with CD receive dysphagia evaluation and more importantly cervical spine imaging to rule out chronic C2 nonunion fracture.

Adventitial Cystic Disease of the Radial Artery.

Upper extremity adventitial cystic disease is rare, but the characteristic findings of this lesion should be known to the hand surgeon and used to guide treatment. We present a case of a young adult male who developed a painless mass in his distal forearm. Diagnostic imaging workup revealed a cystic mass that extended within and encased the radial artery. Both MRI and direct intraoperative visualization confirmed the presence of a stalk connecting the intra-mural radial artery mass to the radiocarpal joint. The mass and stalk were excised en bloc with fenestration of the volar capsule to prevent recurrence. This case demonstrates a less common example of upper extremity adventitial cystic disease and supports the articular theory of origin of these lesions. When surgical excision is performed, an attempt should be made to identify and excise the articular stalk in an effort to minimize risk of recurrence.

Rapidly Progressive Osteoarthritis: a Review of the Clinical and Radiologic Presentation.

PURPOSE OF REVIEW: The purpose of this paper is to review the distinct clinical and radiographic features that may lead to prompt diagnosis of rapidly progressive osteoarthritis (RPOA) and thus obviate unnecessary and costly diagnostic workup. RECENT FINDINGS: RPOA is uncommon but is more frequently seen in practice because of the aging population. RPOA is a destructive arthropathy that occurs most commonly in elderly women but can also be seen in patients that have sustained trauma. The dramatic radiologic manifestations of RPOA can lead to diagnostic confusion with other arthropathies, infection, and osteonecrosis. RPOA was originally described in the hip but may also involve the shoulder. The etiology of RPOA is not well understood, but subchondral fracture probably plays a role in the development of dramatic destruction of the joint that is seen in affected patients. Early diagnosis may reduce the complexity of surgical management. RPOA is an uncommon condition that occurs most frequently in elderly woman or in patients who have sustained trauma. Prompt recognition of the clinical and radiologic features of this arthropathy can reduce unnecessary diagnostic workup and complexity of surgical intervention.

Perceptions of mistreatment among trainees vary at different stages of clinical training.

BACKGROUND: Mistreatment of trainees remains a frequently reported phenomenon in medical education. One barrier to creating an educational culture of respect and professionalism may be a lack of alignment in the perceptions of mistreatment among different learners. Through the use of clinical vignettes, our aim was to assess the perceptions of trainees toward themes of potential mistreatment at different stages of training. METHODS: Based on observations from external experts embedded in the clinical learning environment, six thematic areas of potential mistreatment were identified: verbal abuse, specialty-choice discrimination, non-educational tasks, withholding/denying learning opportunities, neglect and gender/racial insensitivity. Corresponding clinical vignettes were created and distributed to 1) medical students, 2) incoming interns, 3) residents/fellows. Perceptions of the appropriateness of the interactions depicted in the vignettes were measured on a 5-point Likert scale. Scores were categorized into neutral or appropriate (≤3) or inappropriate (i.e. mistreatment) (>3) and compared using chi-squared tests. RESULTS: Four hundred twenty seven trainees participated (182 students, 120 interns, 125 residents/fellows). Proportions of students perceiving mistreatment differed significantly from those of interns and residents/fellows in domains of verbal abuse, specialty discrimination and gender/racial insensitivity (p < 0.05). In scenarios comparing interns to residents/fellows, no significant differences were noted in perceptions of mistreatment in the domains of non-educational tasks, withholding learning and neglect. CONCLUSIONS: Perceptions of mistreatment differ at different developmental stages of medical training. After exposure to the clinical learning environment, perceptions of incoming interns did not differ from those of residents/fellows, implicating clinical rotations as a key period in indoctrinating students into the prevailing culture. More longitudinal studies are needed to confirm or better examine this phenomenon.

Aligning perceptions of mistreatment among incoming medical trainees.

BACKGROUND: Learner mistreatment has been a long-standing example of unprofessional behavior in medical training. Alignment of perceptions of professional behavior is a critical component of developing a defined organizational culture. Clinical vignettes addressing learner mistreatment can help to achieve this goal. Our aim was to determine whether using clinical vignettes to address learner mistreatment during onboarding can reduce variability in the perceptions of mistreatment. MATERIALS AND METHODS: External experts in the field of labor and employment relations embedded in the clinical learning environment identified six thematic areas of potential mistreatment. Corresponding clinical case vignettes were developed and presented to incoming trainees during the onboarding process, followed by facilitated discussion. Perceptions of mistreatment before and after discussion were assessed on a Likert scale, with results compared using F-test and t-test. RESULTS: There were 145 participants. Most participants reported previously witnessing or experiencing episodes of mistreatment before matriculation (84%), with the majority reporting multiple events. The most common offenders were faculty (57%), residents/fellows (49%), and nurses (33%). Only 10% of incoming trainees reported a previous incident of mistreatment. Postintervention scores demonstrated decreased variability (P < 0.05) in perceptions of mistreatment in all but one vignette (withholding learning opportunities). Two vignettes demonstrated higher perception of mistreatment after intervention (noneducational tasks and gender or racial discrimination, P < 0.05). CONCLUSIONS: Mistreatment remains a prevalent phenomenon in medical training involving a wide cross-section of healthcare providers. Trainees arrive with discordant definitions of mistreatment. Alignment of individuals' definitions can be achieved through the use of carefully crafted clinical vignettes and facilitated discussion.

Subscapularis function after total shoulder arthroplasty: electromyography, ultrasound, and clinical correlation.

BACKGROUND: The literature lacks electromyographic (EMG) examination of subscapularis function in the postoperative period after total shoulder arthroplasty (TSA). The primary purpose of this study was to document EMG activity of the subscapularis after TSA and to correlate it with clinical and ultrasound findings. METHODS: The study included 30 patients who were at least 1 year (average, 2.1 years) from surgery, status post TSA approached through a standard subscapularis tenotomy. Patients returned for a physical examination, ultrasound evaluation, and EMG evaluation. Patients also completed postoperative surveys: the American Shoulder and Elbow Surgeons questionnaire, the Simple Shoulder Test, and the 12-Item Short Form Health Survey. RESULTS: The American Shoulder and Elbow Surgeons, Simple Shoulder Test, and physical 12-Item Short Form Health Survey scores improved from preoperatively to postoperatively, respectively, 45.3 to 76.8 (P = .0002), 3.9 to 9.0 (P < .0001), and 33.9 to 42.8 (P = .017). Six patients had a positive lift-off test result, and the belly-press test result was negative in all patients. Two patients had a subscapularis rupture on ultrasound. The postoperative EMG finding was normal in 15 patients; in the other 15 patients, there was evidence of chronic denervation with reinnervation changes: 30% subscapularis, 27% infraspinatus, 20% supraspinatus, 20% teres minor, and 13% rhomboids. CONCLUSIONS: This is the first study using a comparison EMG evaluation to document subscapularis function after TSA. EMG evaluation showed that active denervation of the subscapularis was not evident in any patient at least 1 year after TSA. However, in half of the patients, there was evidence of chronicdenervation and reinnervation changes across 5 muscle groups. We theorize that surgical exposure, traction, and the use of interscalene regional anesthesia may contribute to these unexpected EMG results.

A young male runner with a posterior knee mass--not just your typical Baker's cyst.

We present the case of a 28-year-old man with a growing mass in his right popliteal fossa causing pain on exertion. The differential diagnosis included Baker's cyst, entrapment syndrome of the popliteal artery, as well as a benign or malignant neoplasm. An ultrasound was non-specific. Follow-up MRI of the knee demonstrated cystic adventitial disease (CAD). With only about 500 cases reported in the literature since its discovery in 1947, CAD is a rare entity. The disease is characterised by mucinous or gelatinous cysts in the arterial or venous adventitia. The disease is predominantly seen in the popliteal artery and typically affects otherwise healthy males in the fourth to fifth decade of life. It presents clinically as intermittent exertional claudication. Examination of our case and a review of the literature will highlight the importance of considering CAD in patients who report of a popliteal mass and intermittent claudication.

MR imaging assessment of arthritis of the knee.

The magnetic resonance (MR) imaging presentations of arthritis of the knee are important for radiologists to recognize because these disorders are often clinically unsuspected. When they are known or clinically suspected, knowledge of imaging features allows for the confirmation and characterization of the extent of disease. This article reviews the fundamental MR imaging manifestations of rheumatologic disorders of the knee and their presentation in specific arthropathies.

Arthritis mimicking sports-related injuries.

Arthritis, including inflammatory, crystal deposition, and synovial proliferative disorders, may mimic sports injury. The purpose of this article is to review the clinical and radiologic findings of arthropathies that can present in athletes and be confused with internal derangement.

Primary osseous tumors of the spine.

Primary osseous spinal tumors are relatively rare in comparison with metastatic disease, myeloma, and lymphoma. Despite their rarity, the interpreting radiologist must be aware of the typical imaging features to provide appropriate diagnosis for guidance of clinical management. The age of occurrence, distribution longitudinally in the spine, and distribution axially within the vertebra combined with typical imaging appearances can help indicate the correct diagnosis. This article reviews the diagnostic features of benign and malignant primary bone spinal tumors.

Radiology fellowship with a focus on musculoskeletal imaging: current challenges and future directions.

OBJECTIVE: Many musculoskeletal fellowships are nonaccredited, leading to heterogeneity of educational experiences. There is no governing body for these nonaccredited fellowships, leaving program content and rules to the program directors' discretion. In addition, imaging fellowships in general currently face many external pressures that challenge their capacity to provide a high-quality education. Federal cuts to Medicare, diminished reimbursement to radiology departments, and pressure for increased accountability exerted by insurance companies and hospitals all place additional stress on fellowship training programs. CONCLUSION: Only those fellowships providing the highest-quality educational experience will continue to thrive.

False-positive PET/CT for lymphoma recurrence secondary to Langerhans cell histiocytosis.

A 28-year-old man with a history of Hodgkin lymphoma that was intensely [F-18]fluoro-2-deoxy-D-glucose-avid at diagnosis had achieved complete remission following appropriate therapy. On surveillance positron emission tomography/computed tomography (CT), new, intensely [F-18]fluoro-2-deoxy-D-glucose-avid lesions (lytic on CT) were seen within the vertebral body of C7, left scapula, and right glenoid. The findings of a biopsy revealed these lesions to be Langerhans cell histiocytosis. Langerhans cell histiocytosis arising in the context of lymphoma is a well-documented phenomenon, and its appearance on positron emission tomography/CT cannot be conclusively distinguished from lymphoma recurrence. This manuscript emphasizes the necessity of biopsy to ensure correct diagnosis and subsequent correct therapy.