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Second primary osteosarcoma with rosette-like structure in a patient with retinoblastoma
Kyoji Okada1, Tadashi Hasegawa, Ukihide Tateishi
1Department of Orthopedic Surgery, Akita University School of Medicine, Hondo 1-1-1, Akita 010-8543 Akita, Japan. cshokada@med.akita-u.ac.jp
Virchows Archiv : an International Journal of Pathology
|October 14, 2004
Summary
This study reports a rare case of a second primary osteosarcoma in a patient with a history of retinoblastoma. The tumor exhibited unique rosette-like structures, a feature not previously documented in secondary osteosarcomas.
Area of Science:
- Oncology
- Pathology
- Ophthalmology
Background:
- Retinoblastoma is a rare eye cancer in children.
- Secondary osteosarcomas can develop years after retinoblastoma treatment.
- This case highlights a unique presentation of secondary osteosarcoma.
Observation:
- A 25-year-old male with a history of bilateral retinoblastoma presented with a temporal bone mass.
- Biopsy revealed a multi-nodular tumor with characteristic rosette-like structures and eosinophilic material.
- Immunohistochemistry showed positivity for epithelial membrane antigen, CD56, and CD99.
Findings:
- The patient was diagnosed with a second primary osteosarcoma.
- The tumor displayed prominent rosette-like features, a novel finding in secondary osteosarcoma.
- Chemotherapy resulted in partial tumor reduction.
Implications:
- This case expands the understanding of secondary osteosarcoma morphology.
- The distinct histological features may influence diagnostic and therapeutic strategies.
- Further research is needed to elucidate the pathogenesis of such unique secondary osteosarcomas.