Atypical Kawasaki disease: report of two cases.

Two cases of atypical Kawasaki disease are reported. Case 1 was a five-month-old male infant admitted to this hospital with a 10-day's history of high fever. On examination, he appeared ill-looking and only hepatomegaly was noted. Laboratory studies showed leukocytosis, thrombocytosis, elevated ESR and pleocytosis in CSF. He was treated as sepsis with meningitis. Sudden death occurred on the eighth day of admission, and left coronary artery aneurysm with thrombosis was noted at autopsy. Case 2 was a four-month-old male infant referred to our hospital with fever and cervical lymphadenopathy of 11 day's duration, and unresponsive to antibiotics. Skin rash had developed after oxacillin injection. Echocardiogram, performed on the third day of admission, disclosed a 5-8 mm aneurysm of the left coronary artery and a 4 mm aneurysm of the right coronary artery. Before a specific diagnostic test for Kawasaki disease becomes available, we suggest that a possible diagnosis of Kawasaki disease and echocardiographic evaluation should be considered in case of (1) presence of partial criteria of Kawasaki disease with thrombocytosis; and/or (2) young infants with prolonged unexplained fever.