Fibro-Osseous & Bony Lesions

Question 1

Monostotic vs Polystotic Fibrous Dysplasia

Answer 1

Mono:
- affects single bone
- usually in 20-30y/o, discovered later bc only affects 1 bone
- more common
- MAXILLA > MANDIBLE

Poly:
- affects multiple bones (long bones)
- females
- usually < 10y/o (bc the younger u are, bones havent develop then affect more)
- may be associated McCune Albright Syndrome

Question 2

What is unique about monostotic FD?

Answer 2

More commonly in Maxilla > Mandible

Question 3

Radiographic features of Fibrous Dysplasia

Answer 3

• Expansile lesion
• Ill-defined borders
• Ground glass appearance