Assertion: cogan syndrome | /r/HasProperty | rare
Facets:
value: extremely
type: DEGREE
Source sentences:
text: Cogan syndrome is extremely rare and its cause is not known.
text: Cogan syndrome is a rare disorder characterized by recurrent inflammation of the front of the eye (the cornea) and often fever, fatigue, and weight loss, episodes of vertigo (dizziness), tinnitus (ringing in the ears) and hearing loss.