Table 1 Cherubism grading system according to Motamedi (1998) and Raposo-Amaral (2007)

Class 2

multiple lesions of the mandibular body

Class 3

solitary lesion of the ramus

Class 4

multiple lesions of the rami

Class 5

lesions involving the mandibular body and rami

Grade II

Lesions involving the mandible and maxilla without signs of root resorption

Class 1

lesions involving the mandible and maxillary tuberosities

Class 2

lesions Involving the mandible and anterior maxilla

Class 3

lesions involving the mandible and entire maxilla

Grade III

Aggressive lesions of the mandible with signs of root resorption

Class 1

solitary lesion of the mandibular body

Class 2

multiple lesions of the mandibular body

Class 3

solitary lesion of the ramus

Class 4

multiple lesions of the mandibular rami

Class 5

lesions involving the mandibular body and rami

Grade IV

Lesions involving the mandible and maxilla and showing signs of root resorption

Class 1

lesions involving the mandible and maxillary tuberosity

Class 2

Lesions involving the mandible and anterior maxilla

Class 3

lesions involving the mandible and entire maxilla

Grade V

The rare, massively growing, aggressive, and extensively deforming juvenile cases involving the maxilla and mandible, and may include the coronoid and condyles

Grade VI

The rare, massively growing, aggressive, and extensively deforming juvenile lesions involving the maxilla, mandible and orbits