Parosteal osteogenic sarcoma predominantly affects females in their second to fourth decades. Complete radical removal, such as resection or amputation, is the recommended treatment for this bone tumor.
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Parosteal osteogenic sarcoma is a rare malignant bone tumor.
It typically arises on the surface of bone, often in the distal femur.
Purpose of the Study:
To present a clinicopathologic analysis of parosteal osteogenic sarcoma.
To evaluate treatment outcomes and prognostic factors.
Main Methods:
Retrospective review of 79 patients with parosteal osteogenic sarcoma.
Analysis of clinical, radiographic, and histopathologic features.
Correlation of treatment modalities with patient outcomes.
Main Results:
The study included 79 patients, with a female predominance and peak incidence in the second to fourth decades.
The distal femur was the most common site (68%), characterized by a lobulated mass attached to bone without medullary involvement.
Histologically, well-formed osteoid bands within a hypocellular spindle cell stroma were observed. Seven lesions showed high-grade foci, and six had medullary cavity involvement.
Initial treatments included excision (31 patients, 4 recurrences), resection (10 patients, 3 recurrences), and amputation (27 patients, 4 pulmonary metastases).
Histologic "activity" and medullary involvement were adverse prognostic indicators.
Conclusions:
Complete radical removal is the treatment of choice for parosteal osteogenic sarcoma.
Resection is preferred when feasible, with amputation reserved for necessary cases.
Prognosis is influenced by tumor activity and extent of local invasion.
