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Table 1 Patient's workup throughout her hospitalization

From: An adolescent girl with signs and symptoms of anaphylaxis and negative immunologic workup: a case report

TestResult
Direct laryngoscopyNo paradoxical vocal cord movement or dysfunction
ComplementNormal C4, C1esterase inhibitor level and function
Skin prick testSensitization to hazelnut, pecan, and walnut, otherwise negative
Serum specific IgE< 0.35 kU/L (normal) for foods of concern except for several tree nuts per outside allergist’s report
Serum tryptase2.4, 1.2, 1.6, 1.7, and 3.8 ng/ml (normal < 11.5 mg/ml)
Bone marrow biopsyEquivocal
Urine N-methylhistamine203 and 394 mcg/g (normal range 70–333 mcg/g)
Urine prostaglandins (PG D2)70 ng/24 hours (normal range 100–280 ng/24 hours)
Urine 2,3-dinor 11B-prostaglandin F2a1333 pg/mg (normal level < 5205 pg/mg in adults, no pediatric reference range available)
Complete blood countWithin normal limits
Comprehensive metabolic panelWithin normal limits