Presentation
Trauma.
Patient Data
Age: 15 years
Gender: Female
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CT of knee demonstrates lucent lesion with a sclerotic rim located eccentrically in proximal diaphysis of right fibula. No cortical breach or periosteal reaction.
Knee joints are unremarkable.
Case Discussion
Typical CT appearance of non-ossifying fibroma. It is a benign metaphysical lesion, one of "do not touch" lesions. Initially, it located in the methaphysis but during bone growth, it migrates distally to diaphysis (as in our case).