Multifocal Ewing sarcoma. Presentation of a pediatric case.
DOI:
https://doi.org/10.35954/SM2023.42.1.3.e501Keywords:
Bone neoplasms, Ewing sarcoma, Neuroectodermal Tumors, Primitive, Peripheral.Abstract
Introduction: Ewing's sarcoma is a malignant neoplasm of mesenchymal origin. At the time of diagnosis 75% of the cases are localized.
Objective: to report a case that, due to its multifocal presentation, generated diagnostic difficulties.
Clinical case: 6-year-old girl. She consulted for right hand trauma after a fall from her height 24 hours earlier, with edema, warmth and erythema in the right hand and fist, with preserved mobility. No fever. X-ray: increase in the diameter of the 3rd metacarpal, frosted image, no traces of fractures. Admitted with cellulitis. Mild microcytic anemia, hypochromic. C-reactive protein 82mg/l. Receives intravenous clindamycin 72 hours, completes 14 days orally. Persistence of alterations in fist and right hand, adds tumor of nasal root with deviation of the axis, painless. Alkaline phosphatase, lactate dehydrogenase, phosphatemia, normal calcemia. MRI: morphostructural alteration of radius, olecranon and 3rd metacarpal, fracture of olecranon and radius, periosteal reaction. Pet-Scan: extensive bone lesion in facial mass, tibiae, ulnae, right humerus and clavicle. Biopsy 3rd metacarpal: small cell tumor, blue round, CD 99 and vimentin positive. Polychemotherapy and radiotherapy were started without complications.
Conclusions: it is frequent that the initial clinical manifestations are confused with more frequent entities, such as post-traumatic and/or inflammatory, as occurred in this case. Subsequently, the appearance of new lesions and compromise of the general condition guided the diagnostic approach of the tumor pathology. Confirmation requires anatomopathological study with immunohistochemical study. The presence of bone metastases constitutes a poor prognostic factor and hinders the therapeutic approach.
Received for review: January 2023.
Accepted for publication: March 2023.
Correspondence: Bulevar Artigas 1590. Montevideo, Uruguay. Tel: (+598) 27091443.
Contact e-mail: anitacasuriaga7@gmail.com
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