This was a prospective observational cohort study, conducted between January 2011 and December 2015 (5 years) at Sisli Hamidiye Etfal Hospital, a tertiary care university-affiliated medical center in Istanbul. Written informed consent was obtained from the parents of all infants enrolled in the
AA amyloidosis is associated with chronic inflammatory conditions (rheumatoid arthritis, ankylosing spondylitis, inflammatory bowel disease), chronic infection (tuberculosis, osteomyelitis), and Familial Mediterranean Fever. Rheumatoid arthritis is the major cause of AA amyloidosis in Western Europe