צפייה בהמלצה
TRANSCRIPT
Dr. Kessel Aharon , Department of Allergy and Clinical Immunology
Bnai-Zion,2007
CHRONIC AND ACUTE URTICARIA IN CHILDREN
Urticaria, is characterized by transient, itchy, elevated edematous wheals or red papules.
Wheal typical features
# A central swelling, surrounded by erythema.
# Itching or burning sensations
# The wheal disappear usually within 1-24 h.
# Pronounced swelling of the lower dermis and subcutis.
# Most often found in the lips, eyelids or genitalia.
# Itching and sometimes pain.
# Resolution can take up to 72h.
# It is associated with urticaria in about 40% of cases.
Angioedema
The histology of the lesions of chronic idiopathic urticaria
Venule and capillary dilatation
tissue edema –upper and mid dermis.
predominantly perivascular cellular infiltrate – primarily mononuclear cells
T cell are the predominant cell type (80%)
Mild to moderate increase of mast
Cell numbers
Clinical classification of urticaria and angioedema
• Ordinary urticaria- acute , chronic, episodic.
• Physical urticaria
• Angioedema
• Contact urticaria
• Urticarial vasculitis
Clinical classification of urticaria and angioedema
Ordinary urticaria
Acute- up to 6 weeks of continuous activity
Chronic – 6 weeks or more of continuous
Episodic (intermittent)
מה היא הסיבה השכיחה ביותר שניתן למצוא כגורמת לאורטיקריה חריפה ?
אלרגיה לתרופות1.
מחלות זיהומיות 2.
עקיצות חרקים3.
חומרי ניגוד4.
אלרגיה למזון5.
57 children age range 1-36 months
Presumptive cause
Viral infection 18 cases (12 associated with drug intake)
Adenovirus EBV Enterovirus RSV
ROTA virus Varicella-Zoster virus
BACTERIAL INFECTION 1 CASE– E.COLI
FOOD -6 cases
Probable cause (27 cases)– viral infections
Mortureux P, et al Archives of dermatology 1998;143:319-23.
Acute urticaria• Infections-
viral :herpes simplex, hepatitis B, coxsackie A and B, upper respiratory infections.
• Bacterial- associated with certain infectious foci: dental caries/abscesses, pharyngitis /tonsillitis, otitis media, occult abscesses, UTI.
• Parasitic : ascaris, strongyloides, echinococcus, toxocara, fasciola, filaria, schistosoma.
• Fungal?: candida
Acute urticaria
• Exposure to food allergens- milk, eggs, peanuts,
sesame ,soy wheat, shellfish, fish.
• Medications-β-lactam antibiotics, sulfonamides, aspirin.
• Radiocontrast media
האם מתן קורטיקוסטרואידים בנוסף
לאנטיהיסטמיניקה עוזר בטיפול באורטיקריה
חריפה ?
שנים מגיעה לחדר מיון עם אוטיקריה, 4ילדה בת היא מטופלת ע"י רופא מטפל באנטיהיסטמינקה
למרות כך עדיין הפריחה קיימת.
Treatment of acute urticaria
Short Outpatient management of acute urticaria: the role of prednisone.
CONCLUSION: The addition of a prednisone burst improves the symptomatic and clinical response of acute urticaria to antihistamines. Patients' conditions improved more quickly and more completely when prednisone was administered, without any apparent adverse effects.
Ann Emerg Med. 1995 Nov;26(5):547-51.
ALGORITHM FOR ACUTE URTICARIA/ANGIOEDEMA
DETAILED HISTORY: infection
drug
food
physical triggers
PHYSICAL EXAMINATION
SPECIFIC EXAMINATION- CBC , URINE, ESR
SKIN TESTS
IgE-dependent (type -1)
Skin Prick Test (SPT)
Positive reaction
Muckle-Wells syndrome
Familial -dominantly inherited.
urticaria progressive nerve deafness
Limb pain arthritis
Recurrent fever
hypergammaglobulinemia
amyloidosis
SYNDROMYES THAT CAN BE ASSOCIATED WITH URTICARIA
Gleich's syndrome - the episodic angioedema with eosinophilia syndrome
Schnitzler syndrome (SS), first reported in 1972, is characterized by chronic, nonpruritic urticaria in association with recurrent fever, bone pain, arthralgia or arthritis, and a monoclonal immunoglobulin M (IgM) gammopathy in a concentration that is usually less than 10 g/dL.
Chronic Urticaria – 6 weeks or more of continuous urticaria.
מה היא הסיבה השכיחה ביותר לאורטיקריה כרונית ?
אלרגיה לתרופות1.
גורמים זיהומיים 2.
אידיופטי3.
מנגנון אוטואימוני4.
אלרגיה למזון5.
דלקת מפרקים של גיל הילדות6.
שנים 7.8 נקבות , גיל ממצוע 41-זכרים , 52 ילדים (93(
31%אורטיקריה-אידיופטית
29%אורטיקריה אוטואימונית
15%אורטיקריה עקב גורם זיהומי
12%אורטיקריה פיזיקאלית
11%אורטיקריה מולטיפקטוריאלית
2%אורטיקריה אלרגית –
Brunetti et al.
J Allergy Clin Immunol 2004;114:922-7
In 1986 Grattan first described that:
Autologous serum test produces aWheal and Flare reaction In 30-50% of CIU cases
Autoimmune urticaria
Autoimmune (autoantibodies against FcεRI or IgE)
In 1993 M. Greaves first found the presence of autoantibodies in CIU.
N Engl J Med 1993;328:1599-604
In vitro studies demonstrated that
75% of autoAb are IgG against FceR(causing in-vitro human basophil degranulation)
15% were IgG against IgE(cross-linking two IgEs on mast cells)
Autoimmune basis for CIU
Thyroid autoimmunity in pts with CIU
anti-thyroid Ab. in 14-20%
increased / decreased thyroid function in 5-10%
B and T cell lymphocytes derived from active CU patients demonstrated an increase expression of bcl-2.
Immune aberrations- basis for CIU
Activated T cell express increased expression of CD40L
Toubi et al. J Clin Immuno 2000;20:371-378
Physical urticaria
The physical urticarias are characterized by the development of wealing and itching promptly after application of the appropriate physical stimulus.
Weals typically fade within 30-60 minutes. The exception is delayed pressure urticaria when the weals take several hours to appear after sustained pressure and can last up to 48 hours.
Itchy, monomorphic pale or pink wheals on trunk, neck, and limbs – after exercise or a hot shower
Physical urticaria-cholinergic
Prevalence of 11% in the age group of 16-35 years.
Physical urticaria-pressure
Large painful or itchy red swelling at sites of pressure (soles, palms, or waist) lasting 24 hours or more- application of pressure perpendicular to skin produces red swelling after a latent period of 1 to 4 hours.
Physical urticaria- dermographic urticaria
Itchy, linear wheals with surrounding bright-red flare at sites of scratching or rubbing.
Physical urticaria- dermographic urticaria
# The most frequent form of physical urticaria.
# Affecting mainly young adults
# Mean duration 6.5 years
Physical urticaria- heat
A rare form of urticaria.
nduced by direct contact of the skin with warm objects or warm air.
The eliciting temperature ranges from 38º C to more than 50 º C .
Physical urticaria- cold
Itchy pale or red swelling at sites of contact with cold surfaces or fluids- ten minutes application of an ice pack causes a wheal within five minutes of the removal of ice.
More frequent in women than men.
Majority is idiopathic, some can also occur as a result of infections, neoplasia or autoimmune diseases.
Infectious: syphilis, measles hepatitis ,mononucleosis, HIV.
Physical urticaria- cold
Other forms of physical urticaria
Solar
Vibratory
Adrenergic
aquagenic
Role of nonallergic hypersensitivity reactions in children with chronic urticaria ~ 5 %
Food –symptoms clears within 48 hours if relevant food allergens are eliminated.
Food additives
Elimination pseudoallergen diet - for at least 2-3 weeks before beneficial effect seen.
Allergy 1998:53:1074-7
The prevalence in different studies ~ 5-10%
Viruses- hepatitis B,C , EBV , CMV
Bacteria- helicobacter pylori ?
streptococci/staphylococci
parasites -Anecdotal series of cases documented a link between parasites and chronic urticaria such as: toxocara canis, giaardia lamblia, strongyloides stercoralis and even blastocytis hominis.
Urticarial vasculitis
Urticarial vasculitis
•Do not have a predominantly physical trigger.
•Are not caused by underlying vasculitis.
•Are not caused by direct contact with the causative agent.
•This heterogeneous group includes: cases for which no cause can be identified.
IDIOPATHIC URTICARIA
CU Duration ??
* Patients ask, how long CU will last ??
* More than 60% still visit the clinic
after 6 months.
* 40% of patients still suffer from CU
after one year.
0
10
20
30
40
50
60
70
80
90
100
CU%
612243660
Urticaria duration (months)
Clinical and Laboratory Parameters in Predicting Chronic Urticaria Duration: A Prospective Study of 139 Patients
Toubi et al Allergy:2003
94%
75%
52%43%
14%
Rates of urticaria duration in relation to disease severity
severity Rates of urticaria cure 12m* 24m 36m 60m
p value
mild(n = 23)moderate – severe(n = 116)
68% 0% - - 86% 59% 50% 32%
< 0.0001
TREATMENT OF CHRONIC URTICARIA
• Daily non-sedating antihistamine
• Combination of H1 and H2 receptors antagonists
• Corticosteroids
TREATMENT OF SEVERE UNREMITTING URTICARIA
• Plasmapheresis
• Intravenous immunoglobulin
• Cyclosporin A
Cyclosporine A
• cyclosporine on helper T-cells to inhibit T-cell receptor- activated induction of IL-2 gene.
• cyclosporine may also inhibit IgE-stimulated mast cell degranulation and stimulate TGF- expression.
Low dose cyclosporin A in the treatment of severe chronic idiopathic urticaria.
• 2-3mg\kg of CsA, was shown to be beneficial
• AST Positivity could not predicted response to treatment.
• In some cases Prolonged treatment is needed
Toubi et al Allergy 1997;52:312-316.
ANGIOEDEMA
With weals Without weals
All kinds of urticaria except dermographism
Idiopathic
DRUGS- NSAIDs ,ACEIs
C1 eterase deficiency
Complement-dependent (C1 esterase inh.Def.)
Complement-dependent (C1 esterase inh.Def.)
1אנגיואדמה תורשתית סוג
C4 –decreased , C1 esterase-decreased
2אנגיואדמה תורשתית סוג
C4 –decreased , C1 esterase-normal
אנגיואדמה אידיופטית
C4 –normal , C1 esterase-normal
CONTACT URTICARIA
Contact urticaria is an important manifestation of natural rubber latex allergy.
מקרהתאור
שנים16ל.ע בת
הופנתה עקב אורטיקריה מזה כחצי שנה.
ק"ג 5סקירה מערכתית : עליה במשקל של כבחצי שנה ,עייפות.
בדיקה גופנית אורטיקריה קלה בעיקר בבטן וגב – בולטת יותר באזורי לחץ .
בדיקות מעבדה : ס"ד , תפקודי כבד ,כליה, שתן כללית ,צואה לפרזיטים-ללא ממצא.
טסט עורי למוצרי מזון- שלילי
TSH- 50.נוגדנים לרקמת בלוטת התריס ,↑
-AUTOLOGUS SERUM TEST .חיובי
טיפול – מתן אלטרוקסין
מ"ג10לורסטין