Which statement correctly describes pemphigoid and/or pemphigus?

The correct statement highlights that pemphigoid generally has less involvement of the oral cavity compared to pemphigus. Pemphigoid, particularly mucous membrane pemphigoid, tends to affect mucosal surfaces, but it is not as commonly associated with oral lesions as pemphigus. Pemphigus, on the other hand, is characterized by the formation of blisters primarily affecting the skin and mucosal membranes, including the oral cavity.

In this context, while pemphigoid can affect the oral area, its less frequent involvement makes it distinct from pemphigus, which typically presents with oral lesions. Understanding the pathophysiology of these conditions is essential; pemphigoid is an autoimmune condition that primarily targets the basement membrane zone leading to subepithelial blistering, which contrasts with pemphigus where intraepithelial blistering occurs due to changes in desmosomes. Thus, the relative rarity of oral involvement in pemphigoid is a critical distinction.