Basopenia in chronic idiopathic urticaria is associated with serum basophil histamine releasing activity in a subgroup of patients. The lack of granule and surface immunophenotype staining suggests a reduction in numbers rather than an inability to detect circulating degranulated cells by conventional counting methods.
Our results suggest that topical salicylic acid may be beneficial in speeding resolution of MC in children. Dilute phenol application does not appear to affect the disease course.
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