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Updated: Jul 4, 2026
08:18
Three-Dimensional Reconstruction of Orbital Fractures
Published on: May 16, 2025
Parosteal osteosarcoma of the orbit
Nikolaos T Chalvatzis1, George Kalantzis, Maria-Eleni Manthou
1Bristol Eye Hospital, Bristol, United Kingdom. nikocha@hotmail.com
Ophthalmic Plastic and Reconstructive Surgery
|June 4, 2008
Summary
A rare parosteal osteosarcoma of the orbit was successfully treated with marginal excision. This low-grade bone tumor, typically found in long bones, highlights the importance of regular follow-ups for orbital tumors.
Area of Science:
- Ophthalmology
- Oncology
- Pathology
Background:
- Parosteal osteosarcoma is a rare, low-grade malignant bone tumor.
- It typically affects long bones, rarely occurring in the orbit.
- Orbital tumors can present with proptosis, necessitating thorough investigation.
Observation:
- A 60-year-old woman presented with progressive, painless right proptosis.
- CT imaging revealed a well-defined, hyperdense lesion near the lateral orbital wall.
- Surgical excision yielded a stony-hard, lobulated, encapsulated mass.
Findings:
- Histopathology confirmed a low-grade parosteal osteosarcoma.
- This diagnosis is unusual given the orbital location.
- The tumor, despite being malignant, showed well-differentiated features.
Implications:
- Marginal excision can be effective for localized, low-grade orbital parosteal osteosarcoma.
- Regular follow-up is crucial to monitor for local recurrence or dedifferentiation.
- This case expands the known anatomical sites for parosteal osteosarcoma presentation.
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