wˌaɪl ðə tˈɜːm pˈɛmfɪɡəs tˈɪpɪkli ɹᵻfˈɜːz tuː "ɐ ɹˈɛɹ ɡɹˈuːp ʌv blˈɪstɚɹɪŋ ˌɔːɾoʊɪmjˈuːn dɪzˈiːzᵻz" ɐfˈɛktɪŋ "ðə skˈɪn ænd mjˈuːkəs mˈɛmbɹeɪnz", hˈeɪli hˈeɪli dɪzˈiːz ɪz nˌɑːt ɐn ˌɔːɾoʊɪmjˈuːn dɪsˈoːɹdɚ ænd ðɛɹˌɑːɹ nˈoʊ ˌɔːɾoʊˌæntɪbˈɑːdiz.
While the term pemphigus typically refers to "a rare group of blistering autoimmune diseases" affecting "the skin and mucous membranes", Hailey–Hailey disease is not an autoimmune disorder and there are no autoantibodies.