![Figure][1] A 35-year-old woman who presented with recurrent episodes of flushing, headache, palpitations, and elevated serum tryptase (81.7 ng/mL) was treated with fexofenadine and imatinib and diagnosed with the aleukemic… Click to show full abstract
![Figure][1] A 35-year-old woman who presented with recurrent episodes of flushing, headache, palpitations, and elevated serum tryptase (81.7 ng/mL) was treated with fexofenadine and imatinib and diagnosed with the aleukemic variant of mast cell leukemia (MCL), defined as a high percentage of
               
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