Kawasaki disease
Kawasaki disease | |
---|---|
Other names | Kawasaki syndrome, immunoglobulin[1] |
Prognosis | Mortality 0.2% with treatment[4] |
Frequency | 8–124 per 100,000 people under five[5] |
Named after | Tomisaku Kawasaki |
Kawasaki disease (also known as mucocutaneous lymph node syndrome) is a
While the specific cause is unknown, it is thought to result from an excessive
Typically, initial treatment of Kawasaki disease consists of high doses of
Kawasaki disease is rare.[1] It affects between 8 and 67 per 100,000 people under the age of five except in Japan, where it affects 124 per 100,000.[5] Boys are more commonly affected than girls.[1] The disorder is named after Japanese pediatrician Tomisaku Kawasaki, who first described it in 1967.[5][14]
Signs and symptoms
Kawasaki disease often begins with a high and persistent fever that is not very responsive to normal treatment with paracetamol (acetaminophen) or ibuprofen.[15][16] This is the most prominent symptom of Kawasaki disease, and is a characteristic sign that the disease is in its acute phase; the fever normally presents as a high (above 39–40 °C) and remittent, and is followed by extreme irritability.[16][17] Recently, it is reported to be present in patients with atypical or incomplete Kawasaki disease;[18][19] nevertheless, it is not present in 100% of cases.[20]
The first day of fever is considered the first day of the illness,
Bilateral
Kawasaki disease also presents with a set of mouth symptoms, the most characteristic of which are a red tongue, swollen lips with vertical cracking, and bleeding.
Less common manifestations | |
---|---|
System | Manifestations |
GIT
|
|
MSS
|
Polyarthritis and arthralgia |
CVS | Myocarditis, pericarditis, tachycardia,[31] valvular heart disease |
GU | |
CNS | sensorineural deafness
|
RS | Shortness of breath,[31] influenza-like illness, pleural effusion, atelectasis |
Skin | BCG vaccination site, Beau's lines, and finger gangrene
|
Source: review,[31] table.[35] |
In the acute phase of the disease, changes in the
The most common skin manifestation is a diffuse
In the acute stage of Kawasaki disease, systemic inflammatory changes are evident in many organs.
Other reported
The course of the disease can be divided into three clinical phases.[47]
- The aneurysms are generally not yet visible by echocardiography.
- The
- The convalescent stage begins when all clinical signs of illness have disappeared, and continues until the sedimentation rate returns to normal, usually at six to eight weeks after the onset of illness.[31]
Adult onset of Kawasaki disease is rare.
Some children, especially young
Cardiac
Heart complications are the most important aspect of Kawasaki disease, which is the leading cause of heart disease acquired in childhood in the United States and Japan.
Even when treated with high-dose
Many risk factors predicting coronary artery aneurysms have been identified, Coronary artery lesions resulting from Kawasaki disease change dynamically with time.
MI caused by thrombotic occlusion in an aneurysmal, stenotic, or both aneurysmal and stenotic coronary artery is the main cause of death from Kawasaki disease.[61] The highest risk of MI occurs in the first year after the onset of the disease.[61] MI in children presents with different symptoms from those in adults. The main symptoms were shock, unrest, vomiting, and abdominal pain; chest pain was most common in older children.[61] Most of these children had the attack occurring during sleep or at rest, and around one-third of attacks were asymptomatic.[15]
Other
Other Kawasaki disease complications have been described, such as aneurysm of other arteries:
Gastrointestinal complications in Kawasaki disease are similar to those observed in
The neurological complications per central nervous system lesions are increasingly reported.
Causes
The specific cause of Kawasaki disease is unknown.
Circumstantial evidence points to an infectious cause.
Seasonal trends in the appearance of new cases of Kawasaki disease have been linked to tropospheric wind patterns, which suggests wind-borne transport of something capable of triggering an immunologic cascade when inhaled by genetically susceptible children.[6] Winds blowing from central Asia correlate with numbers of new cases of Kawasaki disease in Japan, Hawaii, and San Diego.[109] These associations are themselves modulated by seasonal and interannual events in the El Niño–Southern Oscillation in winds and sea surface temperatures over the tropical eastern Pacific Ocean.[110] Efforts have been made to identify a possible pathogen in air-filters flown at altitude above Japan.[111] One source has been suggested in northeastern China.[6][112]
Genetics
Genetic susceptibility is suggested by increased incidence among children of Japanese descent around the world, and also among close and extended family members of affected people.
SNPs in
Diagnosis
Criteria for diagnosis |
---|
Fever of ≥5 days' duration associated with at least four† of these five changes |
Bilateral nonsuppurative conjunctivitis |
One or more changes of the mucous membranes of the "strawberry" tongue
|
One or more changes of the arms and legs, including redness, swelling, skin peeling around the nails, and generalized peeling |
Polymorphous rash, primarily truncal |
Large lymph nodes in the neck (>15 mm in size) |
Disease cannot be explained by some other known disease process |
†A diagnosis of Kawasaki disease can be made if fever and only three changes are present if coronary artery disease is documented by two-dimensional coronary angiography .
|
Source: Nelson's essentials of pediatrics,[117] Review[118] |
Since no specific laboratory test exists for Kawasaki disease, diagnosis must be based on clinical
Classically, five days of fever[121] plus four of five diagnostic criteria must be met to establish the diagnosis. The criteria are:[122]
- erythema of the lips or oral cavity or cracking of the lips
- rash on the trunk
- swelling or erythema of the hands or feet
- red eyes (conjunctival injection)
- swollen lymph node in the neck of at least 15 mm
Many children, especially infants, eventually diagnosed with Kawasaki disease, do not exhibit all of the above criteria. In fact, many experts now recommend treating for Kawasaki disease even if only three days of fever have passed and at least three diagnostic criteria are present, especially if other tests reveal abnormalities consistent with Kawasaki disease. In addition, the diagnosis can be made purely by the detection of coronary artery aneurysms in the proper clinical setting.[citation needed]
Investigations
A physical examination will demonstrate many of the features listed above.
Blood tests
- thrombocytosis.
- Erythrocyte sedimentation rate will be elevated.
- C-reactive protein will be elevated.
- Liver function tests may show evidence of hepatic inflammation and low serum albumin levels.[123]
Other optional tests include:
- arrhythmiadue to myocarditis.
- Echocardiogram may show subtle coronary artery changes or, later, true aneurysms.
- computerized tomography may show hydrops (enlargement) of the gallbladder.
- Urinalysis may show white blood cells and protein in the urine (pyuria and proteinuria) without evidence of bacterial growth.
- Lumbar puncture may show evidence of aseptic meningitis.
- Angiography was historically used to detect coronary artery aneurysms, and remains the gold standard for their detection, but is rarely used today unless coronary artery aneurysms have already been detected by echocardiography.
Biopsy is rarely performed, as it is not necessary for diagnosis.[8]
Subtypes
Based on clinical findings, a diagnostic distinction may be made between the 'classic' / 'typical' presentation of Kawasaki disease and 'incomplete' / 'atypical' presentation of a "suspected" form of the disease.[6] Regarding 'incomplete' / 'atypical' presentation, American Heart Association guidelines state that Kawasaki disease "should be considered in the differential diagnosis of prolonged unexplained fever in childhood associated with any of the principal clinical features of the disease, and the diagnosis can be considered confirmed when coronary artery aneurysms are identified in such patients by echocardiography."[6]
A further distinction between 'incomplete' and 'atypical' subtypes may also be made in the presence of non-typical symptoms.[47]
Case definition
For study purposes, including
Differential diagnosis
The broadness of the differential diagnosis is a challenge to timely diagnosis of Kawasaki disease.
Kawasaki-like disease temporally associated with COVID-19
In 2020, reports of
Several reported cases suggest that this Kawasaki-like multisystem inflammatory syndrome is not limited to children; there is the possibility of an analogous disease in adults, which has been termed MIS-A. Some suspected patients have presented with positive test results for SARS-CoV-2 and reports suggest intravenous immunoglobulin, anticoagulation, tocilizumab, plasmapheresis and steroids are potential treatments.[128][129][130]
Classification
Debate has occurred about whether Kawasaki disease should be viewed as a characteristic immune response to some infectious
Inflammation, or
Other diseases involving necrotizing vasculitis include polyarteritis nodosa, granulomatosis with polyangiitis, Henoch–Schönlein purpura, and eosinophilic granulomatosis with polyangiitis.[132]
Kawasaki disease may be further classified as a medium-sized vessel vasculitis, affecting medium- and small-sized blood vessels,
It can also be classed as an autoimmune form of vasculitis.[4] It is not associated with anti-neutrophil cytoplasmic antibodies, unlike other vasculitic disorders associated with them (such as granulomatosis with polyangiitis, microscopic polyangiitis, and eosinophilic granulomatosis with polyangiitis).[132][138] This form of categorization is relevant for appropriate treatment.[139]
Treatment
Children with Kawasaki disease should be hospitalized and cared for by a physician who has experience with this disease. In an academic medical center, care is often shared between pediatric
High-dose aspirin is associated with anemia and does not confer benefit to disease outcomes.[146]
About 15-20% of children following the initial IVIG infusion show persistent or recurrent fever and are classified as IVIG-resistant. While the use of
Prognosis
With early treatment, rapid recovery from the acute symptoms can be expected, and the risk of coronary artery aneurysms is greatly reduced. Untreated, the acute symptoms of Kawasaki disease are self-limited (i.e. the patient will recover eventually), but the risk of coronary artery involvement is much greater, even many years later. Many cases of myocardial infarction in young adults have now been attributed to Kawasaki disease that went undiagnosed during childhood.[6] Overall, about 2% of patients die from complications of coronary vasculitis.[citation needed]
Laboratory evidence of increased inflammation combined with demographic features (male sex, age less than six months or greater than eight years) and incomplete response to IVIG therapy create a profile of a high-risk patient with Kawasaki disease.
A
Rarely, recurrence can occur in Kawasaki disease with or without treatment.[160][161]
Epidemiology
Kawasaki disease affects boys more than girls, with people of Asian ethnicity, particularly Japanese people. The higher incidence in Asian populations is thought to be linked to
Currently, Kawasaki disease is the most commonly diagnosed pediatric vasculitis in the world. By far, the highest incidence of Kawasaki disease occurs in Japan, with the most recent study placing the attack rate at 218.6 per 100,000 children less than five years of age (about one in 450 children). At this present attack rate, more than one in 150 children in Japan will develop Kawasaki disease during their lifetimes.[citation needed]
However, its incidence in the United States is increasing. Kawasaki disease is predominantly a disease of young children, with 80% of patients younger than five years of age. About 2,000–4,000 cases are identified in the U.S. each year (9 to 19 per 100,000 children younger than five years of age).[140][163][164] In the continental United States, Kawasaki disease is more common during the winter and early spring, boys with the disease outnumber girls by ≈1.5–1.7:1, and 76% of affected children are less than 5 years of age.[165]
In the United Kingdom, prior to 2000, it was diagnosed in fewer than one in every 25,000 people per year.[166] Incidence of the disease doubled from 1991 to 2000, however, with four cases per 100,000 children in 1991 compared with a rise of eight cases per 100,000 in 2000.[167] By 2017, this figure had risen to 12 in 100,000 people with 419 diagnosed cases of Kawasaki disease in the United Kingdom.[168]
In Japan, the rate is 240 in every 100,000 people.[169]
Coronary artery aneurysms due to Kawasaki disease are believed to account for 5% of acute coronary syndrome cases in adults under 40 years of age.[6]
History
The disease was first reported by Tomisaku Kawasaki in a four-year-old child with a rash and fever at the Red Cross Hospital in Tokyo in January 1961, and he later published a report on 50 similar cases.[14] Later, Kawasaki and colleagues were persuaded of definite cardiac involvement when they studied and reported 23 cases, of which 11 (48%) patients had abnormalities detected by an electrocardiogram.[170] In 1974, the first description of this disorder was published in the English-language literature.[171] In 1976, Melish et al. described the same illness in 16 children in Hawaii.[172] Melish and Kawasaki had independently developed the same diagnostic criteria for the disorder, which are still used today to make the diagnosis of classic Kawasaki disease. Dr. Kawasaki died on June 5, 2020, at the age of 95.[173]
A question was raised whether the disease only started during the period between 1960 and 1970, but later a preserved heart of a seven-year-old boy who died in 1870 was examined and showed three aneurysms of the coronary arteries with clots, as well as pathologic changes consistent with Kawasaki disease.[174] Kawasaki disease is now recognized worldwide. Why cases began to emerge across all continents around the 1960s and 1970s is unclear.[175] Possible explanations could include confusion with other diseases such as scarlet fever, and easier recognition stemming from modern healthcare factors such as the widespread use of antibiotics.[175] In particular, old pathological descriptions from Western countries of infantile polyarteritis nodosa coincide with reports of fatal cases of Kawasaki disease.[6]
In the United States and other developed nations, Kawasaki disease appears to have replaced acute rheumatic fever as the most common cause of acquired heart disease in children.[176]
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External links
- Kawasaki disease at Curlie