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Primary Ewing's sarcoma of the suodenum: a case report
Jeong-Hae Kie1, Mi-Kyung Lee, Chong-Jai Kim
1Department of Pathology, National Health Insurance Cooperation Ilsan Hospital, Koyang, Korea.
International Journal of Surgical Pathology
|November 15, 2003
Summary
This case study details a rare duodenal Ewing's sarcoma in a young woman. The findings confirm primary duodenal involvement as a potential site for this small round-cell tumor.
Area of Science:
- Oncology
- Gastroenterology
- Pathology
Background:
- Ewing's sarcoma is a rare bone and soft tissue cancer.
- Gastrointestinal involvement is an uncommon presentation of Ewing's sarcoma.
- Early diagnosis and characterization are crucial for effective treatment.
Observation:
- A 20-year-old woman presented with a rapidly progressing ulcerative lesion in the duodenum.
- Histopathological examination revealed a small round-cell tumor (SRCT) in the duodenal specimen.
- Immunohistochemistry showed CD 99 and vimentin positivity, with focal cytokeratin reactivity.
Findings:
- Electron microscopy identified primitive tumor cells lacking specific organelles or junctions.
- Western blot analysis confirmed the presence of the 68-kDa EWS/FLI1 fusion protein, characteristic of Ewing's sarcoma.
- The tumor was definitively diagnosed as primary duodenal Ewing's sarcoma.
Implications:
- This case expands the known anatomical distribution of Ewing's sarcoma.
- Highlights the duodenum as a potential, albeit rare, primary site for Ewing's sarcoma.
- Emphasizes the importance of considering rare diagnoses in gastrointestinal oncology.