Desquamative gingivitis represents oral manifestations of all of the following except:
Desquamative gingivitis represents oral manifestations of various diseases like

Lichen planus (Erosive or atrophic form),
Cicatrial pemphigoid or Benign mucous membrane pemphigoid
pemphigus.
Erosive lichen planus.
Benign mucous membrane pemphigoid.
Erythema multiformae.
Pemphigus.