a) Option E is correct: Hereditary angioedema (HAE) is a genetic disorder manifesting with recurrent angioedema episodes without urticaria, often with positive family history, and does not respond to traditional allergy treatments (epinephrine, antihistamines, corticosteroids) because it is bradykinin-mediated, not histamine | b) Option A is incorrect: Sudden edema onset occurs in both conditions | Option B is incorrect: Good epinephrine response indicates anaphylaxis, not HAE | Option C is incorrect: Elevated tryptase indicates anaphylaxis | Option D is incorrect: Wheezing is more common in anaphylaxis | c) Immediate consultation when: Recurrent angioedema unresponsive to epinephrine with family history; consultant expected to measure C4 and C1-INH and prescribe icatibant or C1-INH concentrate for acute attacks | d) What changes the answer: Good epinephrine response and presence of urticaria excludes HAE and confirms anaphylaxis | e) Consultant Pearl: HAE type I and II due to C1-INH deficiency or dysfunction; type III has normal C1-INH but factor XII mutation; all unresponsive to epinephrine | f) Sources: Scott Browns Otorhinolaryngology 8th edition volume 1.pdf pp.50-51; CUMMINGS OTOLARYNGOLOGY–HEAD AND NECK 7th Ed p1.pdf pp.39-40