Osteosarcoma of the femur mimicking Ewing sarcoma/primitive neuroectodermal tumour on biopsy and metastatic carcinoma on resection.
case_report · Level V
Where this comes from
- Record sourced from PubMed, PMID 22565380.
- Also identified by DOI 10.1007/s00256-012-1406-5.
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Abstract
Osteosarcoma (OS) is known to have several morphological appearances, small cell osteosarcoma and epithelioid osteosarcoma being two well recognized patterns. The former can be mistaken for a Ewing sarcoma/primitive neuroectodermal tumour (ES/PNET), whereas the latter mimics metastatic carcinoma. Herein we present an osteosarcoma in a 17-year-old girl that was diagnosed as an ES/PNET on biopsy; however, the resected specimen revealed a very unusual morphology mimicking a metastatic carcinoma with a sex cord stromal tumour-like pattern.
Medical subject headings
- Carcinoma, Neuroendocrine
- Femoral Neoplasms
- Osteosarcoma
- Sarcoma, Ewing
Anatomy
- femur