[Ewing sarcoma. Diagnostic imaging]. / Das Ewing-Sarkom. Bildgebende Diagnostik.
Radiologe
; 38(6): 509-22, 1998 Jun.
Article
en De
| MEDLINE
| ID: mdl-9700772
Ewing's sarcoma is a highly malignant neoplasm of the bone whose origin is still uncertain. A strong relationship exists between Ewing's sarcoma and tumors of neural origin (Ewing family of tumors). Ewing's sarcoma must be distinguished from other round-cell tumors like lymphoma and neuroblastoma and also must be differentiated from osteogenic sarcomas. On plain radiographs, Ewing's sarcoma appears as a lytic or mixed lytic-sclerotic, rarely as predominantly sclerotic lesion with margins Lodwick grade III. It is located primarily in the diaphyseal and metadiaphyseal regions of the long bones of the lower extremities. A large soft tissue tumor is usually present. Magnetic resonance imaging is the imaging modality of choice to evaluate the extent of the primary lesion, to monitor the response to neoadjuvant chemotherapy and to follow up non-resected Ewing's sarcomas. Bone scintigraphy is necessary to detect skeletal metastasis, and 201thallium scanning has been shown to be sensitive in the monitoring of treatment response. Today, computed tomography is not longer used to image the tumor site; however, spiral CT of the lungs plays a central role as a staging and follow-up tool.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sarcoma de Ewing
/
Neoplasias Óseas
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
De
Revista:
Radiologe
Año:
1998
Tipo del documento:
Article
Pais de publicación:
Alemania