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Kawasaki Disease Print E-mail
by Ron Kennedy, M.D., Santa Rosa, CA

Dr. Kennedy Introduction

Kawasaki disease was first described in Japan in 1967. It is a distinctive clinical illness that is characterized by fever, redness of the eyes, diffuse red rash, redness and swelling of the hands and feet, as well as enlarged lymph nodes in the neck. Kawasaki disease is now the leading cause of acquired heart disease in children in the United States. Rheumatic fever used to be the leading cause of acquired heart disease in children.


Kawasaki disease occurs most frequently in children under five years of age. Twenty percent of cases involve children five years of age and older. The peak age is 18 to 24 months of age. Approximately 3,000 patients are hospitalized in the United States every year with Kawasaki disease.


The cause of Kawasaki disease is unknown. Several clinical features suggest an infectious agent. An association between exposure to rug shampooing and Kawasaki disease has not been confirmed in recent studies. Another theory suggests that Kawasaki disease is a variant of toxic shock syndrome, but this has not been confirmed.


There are three phases of Kawasaki disease. The first phase is characterized by fever, pus in the urine, red eyes, intensely red tongue, dry fissured lips, rash, swollen hands and feet, enlarged lymph nodes and abnormal liver test. The second phase is characterized by resolution of the fever, rash and enlarged lymph nodes, but the irritability and poor appetite may persist. The skin of the fingers and toes may begin to peel. Arthritis and heart problems may develop during this phase which lasts from day 10 until day 21. The heart problems are characterized by the development of weak areas in the coronary arteries. These weak areas may eventually lead to a heart attack.

The third phase is called the convalescent phase because the clinical signs begin to disappear and the laboratory values return to normal.


There is no specific lab test that definitively diagnoses Kawasaki disease. The diagnosis is established by meeting certain criteria. The criteria are as follows: the fever should have been present for at least five days, and four of the following five conditions should also be met.

  • Mucous membrane changes such as a red tongue and dry fissured lips
  • Swelling of the hands and feet
  • Enlarged lymph nodes in the neck
  • Diffuse red rash covering most of the body
  • Redness of the eyes

    In addition, the illness cannot be explained by any known disease process. The liver tests may be abnormal.


    Antibiotics are given until a bacterial infection is excluded. Aspirin is started at a dose of 80-100 milligrams per kilogram per day. Intravenous immune globulin is given over a 12-hour period at two grams per kilogram. Preferably, the immune globulin should be given within the first 10 days of illness. This lowers the risk of cardiac complications. Since aspirin therapy is associated with Reyes syndrome, flu vaccine and chicken pox vaccine should be given if the child is placed on aspirin indefinitely. This is because chicken pox and the flu frequently proceed Reyes syndrome and are thought to contribute to the development of this illness.


    Twenty percent of untreated patients develop weak coronary arteries in the convalescent phase. Treatment with steroids is contraindicated because they increase the incidence of cardiac complications. The mortality rate is .5 percent.


    1. Shulman ST, et al. Kawasaki Disease. Pediatric Clinics of North America. 1995 Oct. pg. 1205-22.
    2. Wiedermann BL, et al. Kawasaki Disease. Griffith' 5 Minute Clinical Consult. 1996: pg. 582-83.

  • The information in this article is not meant to be medical advice.�Treatment for a medical condition should come at the recommendation of your personal physician.

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