Objective: Multisystem inflammatory syndrome in children (MIS-C) is seen as a serious delayed complication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The aim of this study was to describe the most common imaging features of MIS-C associated with SARS-CoV-2. Methods: A retrospective review was made of the medical records and radiological imaging studies of 47 children (26 male, 21 female) in the age range of 25 months–15 years who were diagnosed with MIS-C between August 2020 and March 2021. Chest radiographs were available for all 47 patients, thorax ultrasound for 6, chest CT for 4, abdominal ultrasound for 42, abdomen CT for 9, neck ultrasound for 4, neck CT for 2, brain CT for 1, and brain MRI for 3. Results: The most common finding on chest radiographs was perihilar–peribronchial thickening (46%). The most common findings on abdominal ultrasonography were mesenteric inflammation (42%), and hepatosplenomegaly (38%, 28%). Lymphadenopathy was determined in four patients who underwent neck ultrasound, one of whom had deep neck infection on CT. One patient had restricted diffusion and T2 hyperintensity involving the corpus callosum splenium on brain MRI, and one patient had epididymitis related with MIS-C. Conclusion: Pulmonary manifestations are uncommon in MIS-C. In the abdominal imaging, mesenteric inflammation, hepatosplenomegaly, periportal edema, ascites and bowel wall thickening are the most common findings. Advances in knowledge: The imaging findings of MIS-C are non-specific and can mimic many other pathologies. Radiologists should be aware that these findings may indicate the correct diagnosis of MIS-C.

Aim: As part of the medical team, nurses often take part in both controlled and supervised radiation fields. For this reason, nurses need to know about radiation and radiation safety. This study is aimed to determine the knowledge level of nurses in a tertiary pediatric hospital about radiation safety through a questionnaire. Material and Method: Within the scope of the survey conducted, the age, gender and years of experience data of the participants were collected. In addition, they have been asked whether they have received radiation safety training throughout their professional life and whether they want to receive such training now. Basic questions about radiation safety and questions to measure the general level of information about radiation are also addressed. Results: The link of the survey was delivered to 583 nurses in the study center and 313 nurses completed the questionnaire. 53.67% of the nurses stated that they do not know the name of the beam used for x-ray imaging. 64.28% of the nurses stated that they did not receive such education in their professional life. 78.57% of all participants stated that they wanted to receive a training how to protect themselves while X-ray is being performed in their environment. Conclusion: A significant number of nurses do not receive radiation safety training. Those who received such an education state that they are not satisfied with the training. Nurses want to receive radiation safety training. Trainings with regular and appropriate content can increase nurses’ radiation safety knowledge and awareness.

Objectives: Pain around the coccyx is referred to as coccydynia. Inter coccygeal and sacrococcygeal angles as well as some types of coccyx may be associated with idiopathic coccydynia. The aim of this retrospective study was to evaluate the morphology and morphometry of the coccyx using MRI and to determine whether morphologic-morphometric features are associated with coccydynia in the pediatric population. Methods: This study was performed retrospectively on children aged 10–17 years who underwent pelvic and sacral magnetic resonance imaging for non-trauma related reasons. Inter coccygeal-sacrococcygeal angles and coccyx types were determined using sagittal T1- and T2-weighted images. Gender-specific assessments were made for intercoccigeal and sacrococcygeal angles as well as coccyx types based on Postacchinni and Massobrio classification. In statistical analysis, a p-value less than 0.05 was considered statistically significant. Results: One hundred and fifty-six children were included in the final analysis (108 girls, 48 boys). The mean age of the cases was 13.8 years (10–17). Type 1 was the most common type overall, accounting for 57.7% of the population. The sacrococcygeal angles of boys were significantly higher than those of girls. A significant negative correlation was found between age and sacrococcygeal angle. In children with Type 1 and Type 2 coccyx, girls had significantly higher intercoccigeal angles than boys. The intercoccigeal angle varied significantly in each coccyx type and the intercoccigeal angles increased significantly as the coccyx type increased (from Type 1 to Type 4). The most common coccyx type in the coccidynia group was Type 2, while the most common type in the control group was Type 1. The mean intercoccigeal angles of children with coccidynia were significantly higher than those of the control group. Conclusion: Coccydynia is a symptom with many possible reasons rather than a diagnosis. Coccyx morphology and morphometry can be associated with idiopathic coccydynia. To better understand these morphological and morphometric features, especially in the pediatric population, larger population studies are required.

Purpose The purpose of the present paper was to evaluate the clinical and chest radiographic features of pediatric patients with serologically proven Mycoplasma pneumoniae pneumonia. Materials and methods The clinical records and chest radiographs of 55 consecutive patients (28 male, 27 female) with serologically positive IgG mycoplasma pneumonia were reviewed. The pneumonic infiltrates were described on chest radiography into 3 different patterns as a peribronchovascular infiltration, reticulonodular infiltration and consolidation. Results More than 91% of patients presented with cough and 70% of patients had fever. Chest radiographs displayed three different patterns: (i) peribronchovascular infiltration (n=33, 60%); (ii) reticulonodular infiltration (n=12, 22%); (iii) consolidation (n=10, 18%). Bilateral peribronchovascular infiltration in central and middle lung zones were frequently seen (n=33, 60%). Other radiological features were unilateral lesions in 51% of patients, pleural effusion in 18%, and hilar lymphadenopathy in 20%. Conclusion There are various radiological features of mycoplasma pneumonia in children. Bilateral peribronchovascular infiltration confined to central and middle lung regions seems to be more closely associated with mycoplasma infection.