D2I2.
benign

Osteofibrous dysplasia

Osteofibrous is a rare, non-neoplastic condition with no known cause. It is considered a fibrovascular defect. Campanacci described this condition in two leg bones, the tibia and fibula, and coined the term. This condition should be differentiated from nonossifying fibroma and fibrous dysplasia of bone.

Underlined words are explained — tap any of them.

Plain-language summary adapted from Wikipedia. Not medical advice.