PURPOSE: An increase in the prevalence of obesity and asthma over recent decades has been reported. While there is evidence of a positive association between asthma and obesity, there is no report about association between asthma and obesity in Korea. The aim of this study was to determine if obesity is more prevalent in children with asthma compared with healthy children and to determine if obesity is associated with atopy in children with asthma. METHODS: We studied 291 atopic asthmatic children, 85 nonatopic asthmatic children and 149 healthy children. BMI (kg/m2) and obesity index were calculated using height and weight which were measured on the same day of methacholine challenge test. Obesity was defined as percentile of BMI over 95 percentile. BMI, obesity index and prevalence of obesity were compared among the three groups. Association between obesity and PC20 was also assessed in asthmatics. RESULTS: The prevalence of obesity was similar for atopic asthmatic group (11.6%), nonatopic asthmatic group (11.7%) and healthy group (12.7%). The prevalence of being at risk of overweight was similar for atopic asthmatic group (18.2%), nonatopic asthmatic group (24.7%) and healthy group (18.1%). There was no difference in BMI and obesity index among the three groups. In asthmatics, obesity index was not correlated with PC20 and there was no difference in obesity index among the asthmatics classified by PC20; < 2 mg/mL, 2-8 mg/mL, 8-18 mg/mL. CONCLUSION: These results suggest that obesity is not associated with asthma. Further studies are needed to confirm these findings in general population, and a prospective study is needed to follow younger children through adolescence.
Adolescent ; Asthma* ; Child* ; Humans ; Korea ; Methacholine Chloride ; Obesity* ; Overweight ; Prevalence

Solitary fibrous tumors (SFTs) are a unique group of soft tissue tumors originating from fibroblastic or myofibroblastic tissue. SFTs rarely occur in the liver, with less than 30 cases reported in the literature. We report a case of SFT of the liver presenting unique imaging features on CT and MRI. A 52-year-old woman presented with an incidentally detected hepatic mass that showed homogeneous strong enhancement, starting from the arterial phase until the delayed phase images on CT. On the T2-weighted MR image, the mass was heterogeneously hyperintense with multifocal hypointense dots and bands within the mass. The mass was microscopically characterized by bland-looking, ovoid to spindle shaped cells with stromal and perivascular hyalinization. Immunohistochemical studies showed reactivity for CD34.

Cystic renal masses are commonly encountered in daily clinical practice. Improvements in the resolution of imaging modalities have led to an improved ability to detect cystic renal masses. It is important for radiologists to recognize and appropriately characterize cystic renal masses. Since 1986, the Bosniak classification system has been widely accepted for the evaluation of cystic renal masses, portions of which have been revised in 2019. Although the Bosniak classification system cannot fully differentiate aggressive lesions from indolent lesions, the system may help improve the specificity of detection for higher-risk classes for malignancy, increase the proportion of masses that are surveilled or ignored rather than resected, and select optimal management strategies.