Juxtacortical Chondromyxoid Fibroma of Tibia by Mehrdad Bahrabadi in BJSTR
Abstract
Introduction: Chondromyxoid fibroma, CMF, is the least common
benign cartilaginous tumor composed of chondroid and myxoid matrix.
It is usually located eccentrically in distal femur or proximal tibia
metaphysis. Juxtacortical Chondromyxoid fibroma which may be seen in
unusual places such as intracortical, or sub periosteallocations is very
unusual.
Case report: A 16-year-old boy presented to us with a mildly
painful distal tibial mass for one year. Imaging studies showed a
protruded
mixed radio-opaque, radio lucent lesion at posterior surface of distal
tibial metaphysis, without soft tissue involvement. A biopsy was
performed
which showed Chondromyxoid fibroma. Curettage and bone grafting was done
as the therapeutic modality.
Conclusion: Chondromyxoid fibroma is usually not considered in
the differential diagnosis of a painful, superficial lesion on a long
bone. Other tumors such as periosteal chondroma, parosteal or periosteal
osteosarcoma, parostealmyxoma, sub periosteal ganglion cyst, or
periosteal osteoid osteoma are usually considered. Our case along with
similar cases has proved that Juxtacortical CMF should be included in
the differential diagnosis of a surface bony lesion.
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