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Objectives The aim of this study is to investigate the effect of anti-interleukin (IL)-1/-6 biologics on systemic juvenile idiopathic arthritis (sJIA)-associated macrophage activation syndrome (MAS). Methods Demographic, clinical and laboratory data of patients followed up with a diagnosis of sJIA-associated MAS assessed from sixteen paediatric rheumatology centres across the country. The clinical and laboratory features of MAS developing while on biological drugs were compared with those without this treatment. Results One hundred and sixty-two patients were included in the study. Forty-five of the MAS events were detected under the effect of anti-IL-1/-6 biologics, while the patients experiencing the remaining 155 events have not received biological treatment in the last three months. Platelet count [128 (72–232) vs 199 (130–371) 109/l], ferritin level on admission [1107 (676–2050) vs 2863 (1193–9562) ng/ml], C-reactive protein level [15.4 (2.9–56) vs 90 (32–160) mg/l], erythrocyte sedimentation rate [13 (3–36) vs 43.5 (13–77) mm/h] and fever duration [5 (4–7.5) vs 10 (7–14.3) days] were found lower in the group under the impact of anti-IL-1/-6 biologics. Among patients treated with biologics, 26.6% did not meet the published 2016 MAS classification criteria at presentation. The rates of hepatomegaly and splenomegaly were relatively lower in the canakinumab-treated group when compared with those receiving other biologicals or to patients, not on biologicals. Conclusion Anti-IL-1/-6 therapies can mask the clinical and laboratory features of MAS, and proposed guidelines for MAS classification criteria may not be met. [ABSTRACT FROM AUTHOR]

Aim: Familial Mediterranean Fever (FMF) is one of the most frequent genetic diseases with a frequency of 1/1,000 in our country. We aimed to assess awareness of FMF among caregivers of patients with and without FMF. Materials and Methods: Caregivers of FMF patients (group 1) and other caregivers who were in hospital for other reasons (group 2) were given a questionnaire regarding FMF and the results were compared between the 2 groups. Results: The mean ages were similar between group 1 (n=142) and group 2 (n=207). Female gender and lower educational status were more frequent in group 1. Group 1 was more aware that recurrent fever, joint pain, abdominal pain, and its occurrence in attacks are seen in FMF; and also that the disease is inherited rather than contagious; that a specific treatment exists; that the risk of kidney and heart failure increases when not treated; that attacks are triggered by sleeplessness, tiredness or emotional stress; that colchicine does not provide complete recovery; and that diarrhea is the most common side effect of colchicine (p<0.05). However, awareness about chest pain as a feature, infertility as a complication, non-adherence as a trigger for the disease and the statement that "patients feel healthy between attacks" were similar (p>0.05). Interestingly, group 2 was more aware that different treatment options exist (p=0.04). The total score was higher in group 1 and in participants who only graduated from secondary school or less (p<0.01). Conclusion: Being a caregiver of a patient was associated with a higher level of awareness of FMF regardless of education level, however, they still need to be informed about current developments. [ABSTRACT FROM AUTHOR]

Introduction: Multisystem inflammatory syndrome in children (MIS-C) is a rarely seen severe complication of coronavirus disease-2019 (COVID-19). Although fever is one of the indispensable symptoms, other infections should be considered in the differential diagnosis during the pandemic. Case report: An 8-year-old and a 16-year-old female patient were admitted with fever, vomiting, headache. Both had fulfilled the criteria and were diagnosed with MIS-C. However, they both had remarkable persistent costovertebral angle tenderness, which was unexpected in MIS-C. In Case-1, urine analysis showed microscopic hematuria without pyuria, and urine culture showed no bacterial growth. Case-2 had microscopic hematuria and pyuria with Escherichia coli growth in urine culture. Contrastenhanced computed tomography showed wedge-shaped hypodense multiple lesions in bilateral kidneys for Case-1, in the right kidney for Case-2. They diagnosed acute focal bacterial nephritis (AFBN). Conclusions: The diagnostic criteria of MIS-C can overlap with the symptoms of other severe septic infections such as AFBN, which is a rare urinary tract infection, diagnosed by imaging of localized renal inflammatory mass-like or wedge-shaped lesion. A detailed anamnesis and careful physical examination may help differential diagnosis. [ABSTRACT FROM AUTHOR]

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