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An IgE level greater than 2,000 IU/mL is often considered diagnostic. [17] However, patients younger than 6 months of age may have very low to non-detectable IgE levels. Eosinophilia is also a common finding with greater than 90% of patients having eosinophil elevations greater than two standard deviations above the normal mean. [ 18 ]
IgE is typically the least abundant isotype: blood serum IgE levels in a non-atopic individual are less than 0.0001% of the total Ig concentration, [10] compared to 75% for the IgGs at 10 mg/ml. Despite this, it is capable of triggering anaphylaxis, one of the most rapid and severe immunological reactions. [11]
A reference range is usually defined as the set of values 95 percent of the normal population falls within (that is, 95% prediction interval). [2] It is determined by collecting data from vast numbers of laboratory tests.
Hyper IgM syndrome is a rare primary immune deficiency disorders characterized by low or absent levels of serum IgG, IgA, IgE and normal or increased levels of serum IgM. [ 8 ] They are resulting from mutations in the pathway from B-cell activation to isotype class switching.
Idiopathic generalized epilepsy (IGE) is a group of epileptic disorders that are believed to have a strong underlying genetic basis. IGE is considered a subgroup of Genetic Generalized Epilepsy (GGE). [1] Patients with an IGE subtype are typically otherwise normal and have no structural brain abnormalities.
The RAST is a radioimmunoassay test to detect specific IgE antibodies to suspected or known allergens for the purpose of guiding a diagnosis about allergy. [10] [11] IgE is the antibody associated with Type I allergic response: for example, if a person exhibits a high level of IgE directed against pollen, the test may indicate the person is allergic to pollen (or pollen-like) proteins.
i put the 'Expert-verify' tag in the article because the key information of what the normal levels of IgE are in ng/mL or kIU/L is missing. "> 10 times normal" is rather vague when neither this article nor Immunoglobulin E have a referenced value of the normal value or a normal range. Boud 22:38, 14 August 2008 (UTC)
Other suggestive laboratory findings include decreased numbers of B cells, T cells, and NK cells; and hypergammaglobulinemia. [1] It can be distinguished from autosomal dominant hyper-IgE (STAT3 deficiency) because people with DOCK8 deficiency have low levels of IgM and an impaired secondary immune response. [3]