Classification of rhabdomyosarcoma.

Curr Top Pathol

Intergroup Rhabdomyosarcoma Study Pathology Center, Children's Hospital, Columbus, OH 43205.

Published: April 1995

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http://dx.doi.org/10.1007/978-3-642-77289-4_12DOI Listing

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Background: The histologic classification of rhabdomyosarcoma (RMS) as alveolar (aRMS) or embryonal (eRMS) is of prognostic importance, with the aRMS being associated with a worse outcome. Specific gene fusions (PAX3/7::FOXO1) found in the majority of aRMS have been recognized as markers associated with poor prognosis and are included in current risk stratification instead of histologic subtypes in localized disease. In metastatic disease, the independent prognostic significance of fusion status has not been definitively established.

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Background: Orbital rhabdomyosarcoma (RMS) is often limited to the orbital cavity and has a favorable prognosis. In some cases, the tumor can erode the orbital bone and behave as a parameningeal RMS (PM-RMS); thus, it is treated more intensively. However, the current protocols do not provide any guidance on how to consider different grades of bone erosion (BE) that can vary widely, hampering a uniform classification and the subsequent treatment assignment.

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Rhabdomyosarcoma in children and young adults.

Virchows Arch

December 2024

Department of Pathology and Laboratory Medicine, Indiana University, 350 W 11st St, Indianapolis, IN, 46202, USA.

Rhabdomyosarcoma (RMS) is the most common soft tissue malignancy in childhood, accounting for 3% of all pediatric malignancies and 50% of all pediatric soft tissue sarcomas. In adolescents and young adults (AYA) however, RMS comprises only 6.5% of all soft tissue sarcomas.

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Article Synopsis
  • Liposarcomas are the most common type of soft tissue sarcoma, primarily found in deep tissues and the retroperitoneum.
  • They include various classifications such as atypical lipomatous tumors, well-differentiated liposarcoma (WDL), dedifferentiated liposarcoma (DDL), myxoid liposarcoma, and pleomorphic liposarcoma.
  • DDL is especially common in the retroperitoneum and can have both well-differentiated lipomatous and dedifferentiated components, sometimes resembling other aggressive tumors, and can even differentiate into several other cancer types or form bone tissue.
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The Other Site of Rhabdomyosarcoma.

Cancer Med

October 2024

Department of Pediatric Hematology and Oncology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.

Background: Rhabdomyosarcoma (RMS) is a rare malignant soft tissue sarcoma (STS), accounting for almost 50% of pediatric STSs. Due to its heterogeneity, RMS presents challenges in diagnosis and treatment, with prognosis varying depending on multiple factors. Tumors localized in the other site (OTH)-including the paraspinal, perianal, thoracic, abdominal, pelvic, and perineal regions-are generally classified as unfavorable.

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