Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4128679 | Annales de Pathologie | 2011 | 4 Pages |
Abstract
We report the case of a voluminous tumor of the adrenal diagnosed in a young pregnant woman at 26th week of amenorrhea. Morphologically, a soft white tumor with haemorragic areas was observed, made of sheets of monomorphous, medium sized, spindle-shaped to polygonal, with high mitotic activity. Tumorous cells expressed cytokeratins AE1/AE3, EMA, and CD99 (expression of vimentin is not relevant). Contemplated diagnoses included poorly differentiated synovialosarcoma, sarcomatoid carcinoma and Ewing tumor. Thanks to molecular biology, showing the specific transcript of Ewing/peripheral primitive neuroectodermal tumor (pPNET) EWS/FLI1, the diagnosis of this atypical tumor in an unusual location was performed. Indeed, 75% of Ewing tumors involve bones (especially, the diaphysis of long bones) and 20 to 25% soft tissues. Primitive visceral involvement is rare; less than 10 cases of adrenal involvement have been reported. The hypothesis that Ewing cell's origin is a mesenchymal stem cell, which may derive from neural crest cell, could explain the uncommon adrenal involvement. Diagnosis of Ewing tumor is based on pathologic and molecular findings, especially in atypical cases.
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Authors
Julie Gonin, Frédérique Larousserie, Bertrand Dousset, Julien Rousseau, Olivier Delattre, Charlotte Waintrop, Vassili Tsatsaris, Jean-Yves Pierga, Marie-Cécile Vacher-Lavenu, Frédérique Tissier,