Ewing's Sarcoma of the Lesser Sac Masquerading as a Pancreatic Tumor.
10.3904/kjim.2012.27.1.91
- Author:
Lakshmi RAO
1
;
Vidya MONAPPA
;
Gabriel RODRIGUES
;
B P SURESH
Author Information
1. Department of Pathology, Kasturba Medical College, Karnataka, India. vidsdr@yahoo.co.in
- Publication Type:Case Reports
- Keywords:
CD99 protein;
Sarcoma, Ewing;
Extraosseous;
Neuroectodermal tumors, primitive
- MeSH:
Antigens, CD/analysis;
Biopsy;
Cell Adhesion Molecules/analysis;
*Diagnostic Errors;
Female;
Humans;
Immunohistochemistry;
Middle Aged;
Neuroectodermal Tumors, Primitive, Peripheral/*diagnosis/immunology/pathology/therapy;
Pancreatic Neoplasms/*diagnosis;
Peritoneal Neoplasms/*diagnosis/immunology/pathology/therapy;
Predictive Value of Tests;
Sarcoma, Ewing/*diagnosis/immunology/pathology/therapy;
Tomography, X-Ray Computed;
Tumor Markers, Biological/analysis
- From:The Korean Journal of Internal Medicine
2012;27(1):91-94
- CountryRepublic of Korea
- Language:English
-
Abstract:
Extraosseous Ewing's sarcoma/primitive neuroectodermal tumor (ES/PNET) is an uncommon, aggressive, and malignant tumor with a poor patient outcome. Its occurrence in the lesser sac is a rare event and to the best of our knowledge, has not been previously described. The present case was clinically and radiologically misdiagnosed as a pancreatic tumor/gastrointestinal stromal tumor. Histopathology revealed a tumor with "small round cells" that were positive for CD99, confirming the diagnosis of ES/PNET. This report highlights the importance of considering Ewing's sarcoma in the differential diagnosis of intraabdominal, extraintestinal masses.
