Synovial osteochondromatosis

Case contributed by Luke Danaher
Diagnosis probable

Presentation

Presents with right ankle mass.

Patient Data

Age: 80 years
Gender: Male
x-ray

Ossification projected over Kager's fat pad with associated overlying soft tissue swelling.

Incidental os peroneum noted.

mri

Osteochondral defect of the talar dome.

Degenerative change of the talonavicular joint.

Case Discussion

Ultrasound-guided biopsy showed low grade spindle cell lesion.

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