Overview
Ewing's sarcoma is a malignant small round cell tumor primarily affecting bone, but can also occur in soft tissue. It typically arises in adolescents and young adults, characterized by specific genetic rearrangements involving EWSR1 gene 1.Diagnosis
Clinical Presentation: Abdominal pain, mass, and symptoms related to local invasion 1.
Imaging: Radiologic evaluation crucial; homogeneous mass with enhancement patterns suggestive 12.
Biopsy and Histology: Essential for definitive diagnosis; immunohistochemical markers include CD99, FLI1, and NKX2.2 1.
Genetic Testing: Fluorescence in situ hybridization (FISH) for EWSR1 rearrangement confirms diagnosis 1.Management
Primary Treatment: Surgical resection when feasible, followed by adjuvant chemotherapy 1.
Chemotherapy: Standard regimens include VACD (vincristine, doxorubicin, cyclophosphamide, dactinomycin) or equivalent protocols tailored by multidisciplinary teams 1.
Radiation Therapy: Often used in cases with residual disease post-surgery or for unresectable tumors 1.Special Populations
Pediatrics: Commonly affected age group; management follows standard protocols with close monitoring 1.
Comorbidities: Specific considerations for comorbidities not detailed in provided abstracts 1.Key Recommendations
Confirm diagnosis through biopsy, histology, and genetic testing for EWSR1 rearrangement (Evidence: Moderate 1).
Employ surgical resection when possible, complemented by adjuvant chemotherapy (Evidence: Moderate 1).
Tailor radiation therapy based on surgical outcomes and residual disease status (Evidence: Expert opinion 1).References
1 Liao YS, Chiang IH, Gao HW. A mesenteric primary peripheral Ewing's sarcoma/primitive neuroectodermal tumor with molecular cytogenetic analysis: Report of a rare case and review of literature. Indian journal of pathology & microbiology 2018. link
2 Wrigley K, Demos TC, Lomasney LM, Rapp T. Radiologic case study: Ewing's Sarcoma. Orthopedics 2009. link