Fatal late onset necrotising enterocolitis in a term infant: Atypical Kawasaki disease or polyarteritis nodosa of infancy?

A 3-month-old infant died following a 3-week illness that commenced with diarrhoea and vomiting, and produced progressive infarction of his small bowel. Post-mortem identified multiorgan arteritis of uncertain aetiology, giving rise to coronary artery occlusion and myocardial infarction as well as necrosis of the entire small bowel and other organs. Kawasaki disease and polyarteritis nodosa of infancy are proposed as possible aetiologies in this case.