Background: Sweet syndrome is characterized by tender erythematous plaques and nodules with predominantly dermal neutrophilic infiltrates. Sweet syndrome is relatively rare in children and adolescents. To date, only a few cases have been reported in Korean literature. Objective: The aim of this study was to investigate the clinical and histopathological features of Sweet syndrome in Korean children and adolescents. Methods: A retrospective study was conducted on 15 pediatric patients (aged ＜18 years) who were diagnosed with Sweet syndrome between 1991 and 2019. We reviewed the clinical and histopathological features of Sweet syndrome. Results: The age of the 15 patients ranged from 4 months to 17 years. Among the 15 patients with Sweet syndrome, nine patients were females and six patients were males. Most patients (80%) had lesions on the upper extremities. Fever and tenderness (60%) were the most commonly associated symptoms. Transient infections such as upper respiratory infection or gastroenteritis were the most common identifiable cause, observed in 40% of patients. Histopathologically, dermal neutrophilic infiltration was observed in all patients. All patients were treated with systemic corticosteroids and showed a good response, although 26.7% of the patients experienced symptom recurrence.During the follow-up period, there were no incidences of any complications or extracutaneous manifestations in the patients. Conclusion In contrast to previous reports of pediatric Sweet syndrome, female predominance was observed in this study. Transient infection was the most common factor. All patients responded well to systemic corticosteroid therapy without complications or extracutaneous manifestations during the follow-up period.

Background: Sweet syndrome is characterized by tender erythematous plaques and nodules with predominantly dermal neutrophilic infiltrates. Sweet syndrome is relatively rare in children and adolescents. To date, only a few cases have been reported in Korean literature. Objective: The aim of this study was to investigate the clinical and histopathological features of Sweet syndrome in Korean children and adolescents. Methods: A retrospective study was conducted on 15 pediatric patients (aged ＜18 years) who were diagnosed with Sweet syndrome between 1991 and 2019. We reviewed the clinical and histopathological features of Sweet syndrome. Results: The age of the 15 patients ranged from 4 months to 17 years. Among the 15 patients with Sweet syndrome, nine patients were females and six patients were males. Most patients (80%) had lesions on the upper extremities. Fever and tenderness (60%) were the most commonly associated symptoms. Transient infections such as upper respiratory infection or gastroenteritis were the most common identifiable cause, observed in 40% of patients. Histopathologically, dermal neutrophilic infiltration was observed in all patients. All patients were treated with systemic corticosteroids and showed a good response, although 26.7% of the patients experienced symptom recurrence.During the follow-up period, there were no incidences of any complications or extracutaneous manifestations in the patients. Conclusion In contrast to previous reports of pediatric Sweet syndrome, female predominance was observed in this study. Transient infection was the most common factor. All patients responded well to systemic corticosteroid therapy without complications or extracutaneous manifestations during the follow-up period.

Background: Evidence for the association between underlying non-alcoholic fatty liver disease (NAFLD), the risk of testing severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) positive, and the clinical consequences of coronavirus disease 2019 (COVID-19) is controversial and scarce. We aimed to investigate the association between the presence of NAFLD and the risk of SARS-CoV-2 infectivity and COVID-19-related outcomes. Methods: We used the population-based, nationwide cohort in South Korea linked with the general health examination records between January 1, 2018 and July 30, 2020. Data for 212,768 adults older than 20 years who underwent SARS-CoV-2 testing from January 1 to May 30, 2020, were obtained. The presence of NAFLDs was defined using three definitions, namely hepatic steatosis index (HSI), fatty liver index (FLI), and claims-based definition. The outcomes were SARS-CoV-2 test positive, COVID-19 severe illness, and related death. Results: Among 74,244 adults who completed the general health examination, there were 2,251 (3.0%) who were SARS-CoV-2 positive, 438 (0.6%) with severe COVID-19 illness, and 45 (0.06%) COVID-19-related deaths. After exposure-driven propensity score matching, patients with pre-existing HSI-NAFLD, FLI-NAFLD, or claims-based NAFLD had an 11–23% increased risk of SARS-CoV-2 infection (HSI-NAFLD 95% confidence interval [CI], 1–28%; FLI-NAFLD 95% CI, 2–27%; and claims-based NAFLD 95% CI, 2–31%) and a 35–41% increased risk of severe COVID-19 illness (HSI-NAFLD 95% CI, 8–83%; FLI-NAFLD 95% CI, 5–71%; and claims-based NAFLD 95% CI, 1–92%). These associations are more evident as liver fibrosis advanced (based on the BARD scoring system). Similar patterns were observed in several sensitivity analyses including the full-unmatched cohort. Conclusion Patients with pre-existing NAFLDs have a higher likelihood of testing SARSCoV-2 positive and severe COVID-19 illness; this association was more evident in patients with NAFLD with advanced fibrosis. Our results suggest that extra attention should be given to the management of patients with NAFLD during the COVID-19 pandemic.

No abstract available.
Mycobacterium chelonae ; Mycobacterium

No abstract available.
Abscess ; Hyaluronic Acid

No abstract available.
Pityriasis Rubra Pilaris ; Pityriasis ; Ustekinumab

No abstract available.
Lichen Sclerosus et Atrophicus* ; Lichens*