Fibrous Dysplasia

Age:Young girl-23 years old.

Complaint: Pain in the right shoulder.

Type of examination:X-ray right shoulder.

Findings:

1-Location:Metaphyseal,diaphyseal and seems to be central.

2-Type of bone destruction:Geographic(type 1 b).

2-Type of lesion:Lytic lesion with Multiple septae are visible and outer cortical rim of the bone is maintained, suggesting a benign pathology.

3-Periosteal reaction:No periosteal reaction.

D.D. according to location as follow

-Enchondroma:In long bone usually shows chondral calcification.

-Pyogenic osteomyelitis:Usually shows permeative pattern rather than geographic.

-Simple bone cyst.

-Fibrous dysplasia.

Diagnosis:Fibrous dysplasia.