Introduction COVID-19 has caused unprecedented hardships in the 21st century with more
than 150 million infections. Various immunological phenomena have been described during …

Background COVID-19, the coronavirus disease that emerged in December 2019, caused
drastic damage worldwide. At the beginning of the pandemic, available data suggested that …

Glomerular disease, be it primary or secondary, occurring in the setting of systemic
autoimmune diseases, infections, drugs, or malignancy, affects individuals of all ages. In …

Background Kawasaki disease is an acute febrile systemic childhood vasculitis, which is
suspected to be triggered by respiratory viral infections. We aimed to examine whether the …

Multisystem inflammatory syndrome associated with the SARS-CoV-2 pandemic has
recently been described in children (MIS-C), partially overlapping with Kawasaki disease …

Objectives To validate the previously proposed classification criteria for Henoch–Schönlein
purpura (HSP), childhood polyarteritis nodosa (c-PAN), c-Wegener granulomatosis (c-WG) …

Immunoglobulin A vasculitis (IgAV; formerly Henoch Schonlein Purpura) is the most
common form of childhood vasculitis. It can occur in any age and peaks around 4–6 years …

Henoch–Schönlein purpura (HSP) is the most common vasculitis in children, in whom
prognosis is mostly dependent upon the severity of renal involvement. Nephritis is observed …

Takayasu arteritis (TA), a granulomatous large vessel vasculitis involves mostly the aorta
and its proximal branches and occurs most commonly in young females. The data on the …

Guidelines or diagnostic criteria in clinical practice assist physicians in their clinical decision-
making and improve health outcomes for patients. Diagnostic and classification criteria …