When it involves the mouth alone, some authors refer to this as "oral Crohn disease", distinguishing it from OFG, and others suggest that OFG is the same condition as Crohn disease when it presents in the oral cavity.
Some researchers categorize oral inflammation as "oral Crohn disease" when focusing on the mouth alone, differentiating it from OFG. Conversely, other experts suggest that OFG and Crohn's disease are essentially the same condition when it presents in the oral cavity.