Imaging Evaluation for Thoracic Spine Fractures in Pediatric Trauma Patients: A Single-Center Experience at an Academic Children's Hospital.

BACKGROUND: Imaging workup for evaluating thoracic spine fracture (TSF) in pediatric blunt trauma is variable. PURPOSE: The aim of the study was to determine the number of TSFs missed by radiography and identified on computed tomography (CT) or magnetic resonance imaging (MRI) that required intervention or resulted in a change in management. METHODS: A retrospective review of children with TSFs was performed. Diagnostic images and reports for these patients were reviewed. Data regarding demographics, clinical presentation, management, and outcomes were extracted from institutional electronic medical records. Use of radiographs, CT, and MRI for evaluation of TSF was quantified. Incidence of TSFs was calculated and stratified by mechanism. The number of TSFs and complicating factors missed on radiography but identified on subsequent CT or MRI were quantified. RESULTS: Three thousand two hundred sixty-five trauma patients 18 years or younger were reviewed. Of these, 3.3% (90/3265) had TSFs (36 females, 54 males; mean age, 10.80 ± 4.4 years). The most common mechanism of injury was fall (43% [39/90]) followed by motor vehicle collisions (30% [27/90]). The most common fracture was simple compression fracture 64%, which occurred most frequently in the mid thoracic spine, followed by transverse process fractures 19% and spinous process fractures 7%. Almost half of all TSFs diagnosed on CT and/or MRI were missed on initial radiographs. While all fractures that required operative management were identified on radiographs, 13 of the 19 fractures that required nonoperative intervention were missed. CONCLUSIONS: Approximately 50% of TSFs diagnosed on CT or MRI were not identified on preceding radiographs. This is similar to studies in adult populations that show poor sensitivity of radiographs.

After-hours radiology coverage in children's hospitals: a multi-center survey.

BACKGROUND: Although the provision of pediatric emergency and trauma radiology has become increasingly prevalent in North America over the last few years, many hospitals differ in their models of providing after-hours coverage. OBJECTIVE: To describe the scope of after-hours radiology services provided in children's hospitals in North America, and the means by which different radiology departments deliver this coverage. MATERIALS AND METHODS: The Society for Pediatric Radiology Emergency and Trauma Imaging Committee developed a survey that we electronically distributed to a single representative from each of the 79 hospitals represented in the Society of Chiefs of Radiology at Children's Hospitals (SCORCH). RESULTS: Completed questionnaires were submitted between Aug. 2, 2017, and Sept. 29, 2017, by 44/79 (56%) SCORCH representatives. Contemporaneous after-hours interpretation of radiographs (81%), ultrasounds (81%), body CT (79%) and neurologic CT (75%) with preliminary or final reports was common. Coverage was accomplished most commonly by a combination of evening and overnight shifts 17/44 (39%). Eleven of 44 (25%) hospitals used a model in which radiologists rotate working blocks of overnight service followed by blocks off service. Only 2/44 (5%) hospitals exclusively provided pager coverage after hours. Attending pediatric radiologists were assigned to the majority of after-hours shifts 110/175 (63%), but radiology trainees provided interpretations independently for varying periods of time at 19/44 (43%) surveyed hospitals. Incentives to work after hours included the option to work remotely, as well as additional income, time off, and academic time. CONCLUSION: The model for delivering after-hours pediatric radiology coverage varies. Most hospitals, however, provide contemporaneous interpretations of radiographs, US, body CT and neurologic CT. Most institutions use evening shifts to extend coverage later, with many providing subsequent overnight coverage. Although most shifts are staffed by attending pediatric radiologists, radiology trainees commonly interpret studies independently for varying durations of time after hours.

CT and MRI findings in pancreatic trauma in children and correlation with outcome.

BACKGROUND: There are limited published data on pancreatic trauma imaging in children. OBJECTIVE: To present our experience using computed tomography (CT) and magnetic resonance (MR) imaging of pancreatic trauma in children and to correlate the imaging grade of pancreatic injury with management and outcome. MATERIALS AND METHODS: A retrospective cohort study of children with pancreatic injury presenting between Jan. 1, 2000, and Dec. 31, 2016, was performed. Patient charts were reviewed to note demographics, the mechanism of injury, associated abdominal injuries, management and outcome. All imaging was rereviewed by two radiologists blinded to clinical and laboratory information, and pancreatic injuries were graded according to the American Association for the Surgery of Trauma (AAST). RESULTS: Of 3,265 patients presented as trauma team activations during the study period, only 28 (0.86%) children (19 boys, 9 girls; mean age: 7.14 years; age range: 1-15 years) had pancreatic injury. Of the available 27 CTs of the abdomen, 26 were performed on the day of trauma. Associated injuries were seen in 25/27 children, most frequently in the liver and lung, 16 (59.2%) each. There were 5 (19%) Grade I, 9 (33%) Grade II, 8 (30%) Grade III and 3 (11%) Grade IV. No patients had Grade V injury. No pancreatic parenchymal injury was identified in 2 (7%) patients with isolated fluid around the pancreas and mesentery. The pancreatic duct was visible in all 10 children (days: 0-330, median days: 41 post-trauma) who had MRI. Eight of these children, who had Grade III/IV injuries on CT and confirmed pancreatic duct injury on endoscopic retrograde cholangiopancreatography (ERCP) or surgery, showed either signal intensity difference in pancreatic parenchyma and/or caliber difference in the pancreatic duct proximal and distal to the injury site. Two patients died because of multiorgan injuries, 9 patients (mainly with Grade III and IV injuries) underwent surgery and/or ERCP, and 16 patients were managed conservatively. AAST grading of pancreatic injury on CT correlated with type of management (P=0.0001) with most of the Grade III and IV injuries treated with intervention and/or surgery while all of the Grade I and II injuries were treated conservatively. CONCLUSION: Pancreatic injury is rare in children but often associated with other organ injuries most frequently involving the liver and lung. CT grading of injury correlates with management and guides intervention and/or surgery versus conservative treatment. MRI is useful for assessing pancreatic duct injury by demonstrating the pancreatic duct directly and/or secondary changes like signal intensity difference in pancreatic parenchyma and caliber difference in the pancreatic duct.

Whole-body MRI of juvenile spondyloarthritis: protocols and pictorial review of characteristic patterns.

Spondyloarthritides are a group of inflammatory rheumatological diseases that cause arthritis with a predilection for spinal or sacroiliac involvement in addition to a high association with HLA-B27. Juvenile spondyloarthritis is distinct from adult spondyloarthritis and manifests more frequently as peripheral arthritis and enthesitis. Consequently juvenile spondyloarthritis is often referred to as enthesitis-related arthritis (ERA) subtype under the juvenile idiopathic arthritis (JIA) classification criteria. The American College of Rheumatology Treatment Recommendations for JIA, including ERA, are based on the following clinical parameters: current treatment, disease activity and the presence of poor prognostic features. The MRI features of juvenile spondyloarthritis include marrow edema, peri-enthesal soft-tissue swelling and edema, synovitis and joint or bursal fluid. Marrow edema is nonspecific and can be seen with other pathologies as well as in healthy subjects, and this is an important pitfall to consider. With further longitudinal study and validation, however, whole-body MRI with dedicated images of the more commonly affected areas such as the spine, sacroiliac joints, hips, knees, ankles and feet can serve as a more objective tool compared to clinical exam for early detection and monitoring of disease activity and ultimately direct therapeutic management.

Paratesticular rhabdomyosarcoma with metastatic encasement of the abdominal aorta.

Paratesticular rhabdomyosarcoma is a rare but aggressive malignancy in children and adolescents. Prognosis is related to initial tumor resectability as well as staging of the disease based on tumor invasiveness, tumor bulk, nodal disease and metastases. We report the unusual presentation of paratesticular rhabdomyosarcoma with metastatic extension through the inguinal canal and encasement of the abdominal aorta. These features portend a poor prognosis given their association with a greater stage of disease and unresectable nature at presentation. Delayed surgical resection follows a regimen of chemotherapy and radiation therapy in such cases of extensive disease. Encasement of the abdominal aorta has been shown to increase presurgical risk for intraoperative vascular injury when related to other malignancies, but its role in relation to metastatic paratesticular rhabdomyosarcoma has not been investigated. Also, rhabdomyosarcoma should be considered in the differential diagnoses of tumors that demonstrate encasement of the abdominal aorta.