title: Urticarial vasculitis with shock, leukopenia and thrombocytopenia, possibly due to anaphylatoxin release.
mesh_terms: D000707:Anaphylaxis / Q000209:etiology*; D003165:Complement System Proteins / Q000032:analysis; D006801:Humans; D007970:Leukopenia / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D013921:Thrombocytopenia / Q000209:etiology*; D014581:Urticaria / Q000209:etiology*; D018366:Vasculitis, Leukocytoclastic, Cutaneous / Q000150:complications*
chemical_list: D003165:Complement System Proteins