From OMIMCherubism is characterized by a loss of bone, restricted to the jaws, and by the replacement of this bone with fibrous tissues, leading to facial swelling. Involvement of the infraorbital rim and the orbital floor leads to the upward tilting of the eyeballs and consequent exposure of the inferior part of the sclerae, giving a 'cherubic' appearance. Submandibular lymph node enlargement is often reported. Functional impairment includes mastication and speech problems, tooth alterations, and loss of normal vision. Onset of the disease is usually between 14 months and 4 years of age. The disease progresses through puberty, then stabilizes, and in some cases regresses without treatment (summary by Tiziani et al., 1999).
http://www.omim.org/entry/118400 From MedlinePlus GeneticsCherubism is a disorder characterized by abnormal bone tissue in the jaw. Beginning in early childhood, both the lower jaw (the mandible) and the upper jaw (the maxilla) become enlarged as bone is replaced with painless, cyst-like growths. These growths give the cheeks a swollen, rounded appearance and often interfere with normal tooth development. In some people the condition is so mild that it may not be noticeable, while other cases are severe enough to cause problems with vision, breathing, speech, and swallowing. Enlargement of the jaw usually continues throughout childhood and stabilizes during puberty. The abnormal growths are gradually replaced with normal bone in early adulthood. As a result, many affected adults have a normal facial appearance.
Most people with cherubism have few, if any, signs and symptoms affecting other parts of the body. Rarely, however, this condition occurs as part of another genetic disorder. For example, abnormal jaw growth, like that in cherubism, can occur in Ramon syndrome, which also involves short stature, intellectual disability, and overgrowth of the gums (gingival fibrosis). Additionally, cherubism-like growths have been reported in rare cases of Noonan syndrome (a developmental disorder characterized by unusual facial characteristics, short stature, and heart defects), fragile X syndrome (a condition primarily affecting males that causes learning disabilities and cognitive impairment), and neurofibromatosis type 1 (a condition primarily characterized by multiple skin tumors).
https://medlineplus.gov/genetics/condition/cherubism