Periosteal osteosarcoma
Updates to Case Attributes
DiagnosisA diagnosis of periosteal osteosarcoma was made based on the radiological features.
Periosteal osteosarcoma is the 2nd most common juxtacortical osteosarcoma. Common location is the shaft of tibia or femur. Radiological features are of a broad based soft tissue mass attached to the cortex, periosteal reaction perpendicular to the shaft, matrix calcificationscalcification, cortical thickening/erosions and normal endosteal margin.
The differential diagnosis are:
Parosteal osteosarcoma - densely ossified juxta cortical mass with no perpendicular periosteal reaction.
Juxtacortical chondrosarcoma - dense chondroid mineralization, no perpendicular periosteal reaction.
-<p>Diagnosis of periosteal osteosarcoma was made based on the radiological features.</p><p>Periosteal osteosarcoma is the 2nd most common juxtacortical osteosarcoma. Common location is shaft of tibia or femur. Radiological features are broad based soft tissue mass attached to cortex, periosteal reaction perpendicular to shaft, matrix calcifications, cortical thickening/erosions and normal endosteal margin.</p><p>differential diagnosis are:</p><p>Parosteal osteosarcoma - densely ossified juxta cortical mass with no perpendicular periosteal reaction.</p><p>Juxtacortical chondrosarcoma - dense chondroid mineralization, no perpendicular periosteal reaction.</p>- +<p>A diagnosis of periosteal osteosarcoma was made based on the radiological features.</p><p>Periosteal osteosarcoma is the 2nd most common juxtacortical osteosarcoma. Common location is the shaft of tibia or femur. Radiological features are of a broad based soft tissue mass attached to the cortex, periosteal reaction perpendicular to the shaft, matrix calcification, cortical thickening/erosions and normal endosteal margin.</p><p>The differential diagnosis are:</p><p>Parosteal osteosarcoma - densely ossified juxta cortical mass with no perpendicular periosteal reaction.</p><p>Juxtacortical chondrosarcoma - dense chondroid mineralization, no perpendicular periosteal reaction.</p>
Updates to Study Attributes
A well defined lobulated T1 isoisointense, T2/T2 fat sat heterogeneously hyperintense soft tissue mass lesion noted adjacent posterior cortex of mid shaft of femur. Involvement of adductor longus, adductor magnus, gracilis and vastus medalis muscles is noted. Broad base of theThe lesion is notedhas a broad base attached to posterior cortex of femur with cortical thickening. T2 fat sat hyper intensehyperintense edema noted surrounding the lesion.
Updates to Study Attributes
Spiculated periosteal reaction noted radiating perpendicular to the femoral cortex. Osteoid matrix mineralization noted within the mass.