Parosteal lipoma is a rare and generally asymptomatic benign tumor of mature adipose tissue that is located in direct apposition to the external surface of the bone. These tumors are occasionally associated with reactive changes in the underlying bone. The reactive bone formation is generally restricted to the base of the tumor, that is, near the periosteum. We recently experienced a case of parosteal lipoma in the proximal femur, which displayed exuberant bone and cartilage formation, and this led us to a misdiagnosis of chondroblastic osteosarcoma on the initial biopsy. We report here on this case with a special emphasis on making the differential diagnosis from osteosarcoma.
Adipose Tissue ; Biopsy ; Cartilage ; Chondrocytes ; Diagnosis, Differential ; Diagnostic Errors ; Femur* ; Lipoma* ; Osteogenesis ; Osteosarcoma ; Osteosarcoma, Juxtacortical ; Periosteum

Herpes zoster (HZ) is one of the most common cutaneous adverse reactionsassociated with the coronavirus disease 2019 (COVID-19) vaccine and has been widely reported. This study aimed to evaluate HZ following COVID-19 vaccination from the viewpointof pain management.Methods: A retrospective study was conducted on 42 patients with HZ who visited the painclinic between August 2021 and October 2021. Medical records were reviewed to comparepain severity, treatment methods, treatment duration, and incidence rate of postherpeticneuralgia (PHN) in patients who received COVID-19 vaccination within 6 weeks prior to developing symptoms compared with other patients with HZ.Results: Fourteen patients developed HZ within 6 weeks after vaccination and were significantly younger than the other HZ groups. There were no significant differences in the frequency of prodromal pain, location of pain, pain severity, treatment methods, treatmentduration, or incidence of PHN compared with the other HZ groups.Conclusions: COVID-19 vaccination-related HZ showed clinical features similar to those ofthe other HZ.

PURPOSE: To evaluate the effects of macular ischemia and early treatment on the visual outcomes of patients with branch retinal vein occlusion (BRVO). METHODS: This study retrospectively reviewed the records of 42 patients who were treated with an intravitreal bevacizumab injection for BRVO, repeated 3 times at 6-week intervals and were whose data available for a follow-up period of at least 4 years. Best-corrected visual acuity (BCVA) and optical coherence tomography (OCT) results before treatment and at 6, 12, 24, 36 and 48 months after the 3 serial injections, were measured. We assessed macular ischemia, time to the first treatment, and the relationship of these with BCVA. RESULTS: Mean BCVA (log MAR) was significantly improved from 0.67 +/- 0.43 at baseline to 0.30 +/- 0.30 at 48 months (p < 0.001). Four years after treatment, mean BCVA in the macular non-ischemic group was better than in the ischemic group, but this relationship did not hold for mean change in BCVA. There was a statistically significant (p < 0.05) difference between the early (< or =6 weeks) and late (>6 weeks) treatment groups in BCVA and mean change in BCVA after 48 months. There was statistically significant (p < 0.05) difference between the early (< or =6 weeks) and late (>6 weeks) treatment groups with macular ischemia in BCVA after 48 months. CONCLUSIONS: In patients with BRVO, a significant visual improvement was maintained after intravitreal bevacizumab injections, despite the presence of macular ischemia. Early treatment (within 6 weeks) is more effective for maintaining and improving visual acuity. Similar results in the macular ischemia group confirmed the importance of early treatment.
Follow-Up Studies ; Humans ; Ischemia* ; Retinal Vein Occlusion* ; Retinal Vein* ; Retinaldehyde* ; Retrospective Studies ; Tomography, Optical Coherence ; Visual Acuity ; Bevacizumab

A self-inflating bag resuscitator is universally used to ventilate patients during cardiopulmonary resuscitation and transfer. This device can be reused after sterilization and reassembly, and the mis-assembly of a resuscitator can possibly happen. We report here on a case of mis-assembly of a resuscitator valve that resulted to barotrauma and instability of a patient.
Barotrauma ; Cardiopulmonary Resuscitation ; Humans ; Sterilization

PURPOSE: To assess the usefulness of breath-hold fast MR imaging of liver with fat suppression (FS) by application of chemical saturation technique in the diagnosis of regional fatty changed suspected in sonography. MATERIALS AND METHODS: Thirteen patients who had focal lesions with diffuse, homogeneous signal changes after FS through chemical saturation technique without additional changes of imaging parameter during MR imaging of liver were selected. T1-weighed fast low-angle shot and T2-weighted turbo spin-echo sequences were obtained with or without FS during each single breath-holding session. Subjective changes of signal intensity between the pre-FS and the FS images were compared with the sonographic findings in each lesion. RESULTS: Seven lesions of decreased signal intensity after FS on T1 or T2-weighted images, including three lesions only at FS T1 images, were regarded as focal fat infiltration. All seven lesions had compatible sonographic findings as homogenously echogenic areas. Another six lesions of subjectively increased signal intensity including two lesions only at FS T2 images were regarded as focal fat sparing. All six lesions had sonographic findings as homogenous echo poor areas suggesting focal fat sparing. In cases regarded as fat infiltration, score changes were more prominent at FS T1 images than FS T2 images(p=0.0002). In cases regarded as fat sparing, score changes were more prominent at FS T2 images than FS T1 images(p=0.042). CONCLUSION: Breath-hold fast T1 and T2-weighted MR imaging with and without chemical saturation pre-pulse may be sufficient for characterization of regional fatty changes in the different ferential diagnosis of focal hepatic lesion found at sonography.
Diagnosis ; Humans ; Liver* ; Magnetic Resonance Imaging* ; Ultrasonography

BACKGROUND: Diffusion-perfusion mismatch (DPM) on MRI has been considered an ischemic penumbra. However, several reports have demonstrated limitation of DPM on MRI as a predictable marker of the ischemic penumbra. In this study, we investigated the relationship between DPM and the clinical progression in acute ischemic stroke patients. METHODS: We consecutively recruited fifty-seven patients showing acute ischemic stroke (within 24 hours) in the middle cerebral artery (MCA) territory. The clinical outcomes were determined by serial measurement of National Institute of Health Stroke Scale (NIHSS) and modified Rankin Scale (mRS) during 30 days after their ischemic event. We also evaluated the relationship among the parameters of perfusion MRI and the clinical worsening in patients with DPM on initial MRI. RESULTS: Nineteen (33.3%) patients had DPM on MRI within 24 hours after stroke onset. Even though the frequency of clinical worsening for 30 days after stroke onset was higher in DPM group (26%) than in non-DPM group (11%), it did not reach statistical significance (p=0.143). However, extent of MCA stenosis (p<0.001) and time to peak (TTP) delay on MRI (p<0.001) were significantly greater in patients with DPM than in those without DPM. Among several parameters of the perfusion MRI, only relative cerebral blood volume (rCBV) was significantly related to the clinical worsening (62.9+/-24.7% vs 96.1+/-19.2%, p=0.007) in patients with DPM. CONCLUSIONS: This study shows that DPM on MRI does not always predict the clinical worsening in acute ischemic stroke. To overcome this problem, we should analyze rCBV map based DPM as well as TTP map based DPM.
Blood Volume ; Brain ; Constriction, Pathologic ; Diffusion ; Humans ; Magnetic Resonance Imaging ; Middle Cerebral Artery ; Perfusion ; Stroke ; Thymine Nucleotides

Inflammation is thought to play a role in the pathogenesis of major adverse cardiovascular events (MACE). It has been suggested that the measurement of markers of inflammation may aid in predicting the risk of such events. Here, the relationship between high-sensitivity C-reactive protein (hs-CRP) levels and MACE in Korean patients with type 2 diabetes is assessed. A retrospective cohort study was conducted as a follow-up among 1,558 patients with type 2 diabetes and without cardiovascular diseases over a mean period of 55.5 months. A Cox proportional-hazards model was used to determine whether increased hs-CRP levels are useful as a predictor for future MACE. The hazard ratio of MACE was 1.77 (95% CI; 1.16-2.71) in subjects who had the highest hs-CRP levels (> 0.21 mg/dL) compared to subjects who had the lowest hs-CRP levels (< 0.08 mg/dL), after adjusting for age, regular physical activity, current smoking, and duration of diabetes. The present results indicate that high hs-CRP levels can act as a predictor for the MACE occurrence in Korean patients with type 2 diabetes.
Adult ; Aged ; Biological Markers/*blood ; C-Reactive Protein/*analysis ; Cardiovascular Diseases/blood/*epidemiology/etiology ; Cohort Studies ; Diabetes Mellitus, Type 2/blood/*complications/epidemiology ; Female ; Follow-Up Studies ; Humans ; Inflammation ; Male ; Middle Aged ; Predictive Value of Tests ; Prognosis ; Proportional Hazards Models ; Republic of Korea ; Retrospective Studies ; Sensitivity and Specificity