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Five-year evolution of a telangiectatic osteosarcoma initially managed as an aneurysmal bone cyst
Tsuyoshi Saito1, Yoshinao Oda, Ken-Ichi Kawaguchi
1Department of Anatomic Pathology (Second Department of Pathology), Pathological Sciences, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, 812-8582 Fukuoka, Japan.
Skeletal Radiology
|December 1, 2004
Summary
Telangiectatic osteosarcoma (TOS) can mimic aneurysmal bone cysts (ABC), leading to delayed diagnosis. This case highlights the importance of vigilant follow-up for recurrent bone lesions, with TOS ultimately diagnosed after two recurrences.
Area of Science:
- Orthopedic Oncology
- Skeletal Radiology
- Pathology
Background:
- Telangiectatic osteosarcoma (TOS) is a rare and aggressive bone tumor.
- Aneurysmal bone cysts (ABC) are benign, fluid-filled lesions that can present with similar radiographic features.
Observation:
- A 20-year-old male presented with a right femoral neck lesion initially diagnosed as an ABC.
- The lesion recurred twice, with the second recurrence revealing high-grade TOS on histopathology.
- Initial management involved curettage and bone grafting, while the second recurrence required wide resection and prosthetic replacement.
Findings:
- Histologic review of the primary lesion showed features overlapping with ABC but with atypical cells.
- The recurrent lesions demonstrated classic high-grade TOS characteristics, including sarcomatous cells and tumor osteoid.
- The patient achieved disease-free status 13 months post-surgery without adjuvant therapy.
Implications:
- This case underscores the diagnostic challenges in differentiating TOS from ABC, particularly in recurrent cases.
- Early recognition and accurate diagnosis of TOS are crucial for appropriate treatment and improved patient outcomes.
- Vigilant radiographic and pathologic evaluation is essential for managing potentially aggressive bone tumors that mimic benign conditions.