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Ewing's sarcoma, though rare, primarily affects children and young adults, commonly manifesting in long bones. Cranial involvement, particularly in the frontal bone, is exceptionally uncommon, posing diagnostic and therapeutic challenges. Meticulous pathological assessment is crucial for recognizing and managing such atypical presentations. A 16-year-old male presented with left frontal swelling and neurological symptoms. Imaging revealed a space-occupying lesion involving the left frontal bone with intracranial extension. Histopathology confirmed Ewing's sarcoma based on characteristic findings and positive immunohistochemical markers. Differential diagnoses include metastatic neuroblastoma, primitive neuroectodermal tumors, and chordomas, highlighting the importance of comprehensive evaluation. Ewing's sarcoma involving the skull necessitates a multidisciplinary approach for accurate diagnosis and management. This case underscores the significance of clinical, radiological, and pathological assessments in recognizing rare manifestations. Collaboration among teams is crucial for tailored management strategies and optimal patient outcomes.
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http://dx.doi.org/10.1055/a-2649-0851 | DOI Listing |
JMIR Res Protoc
September 2025
Department of Medical Oncology, Early Phase Unit, Georges-François Leclerc Centre, Dijon, France.
Background: Sarcomas are rare cancer with a heterogeneous group of tumors. They affect both genders across all age groups and present significant heterogeneity, with more than 70 histological subtypes. Despite tailored treatments, the high metastatic potential of sarcomas remains a major factor in poor patient survival, as metastasis is often the leading cause of death.
View Article and Find Full Text PDFAm J Surg Pathol
September 2025
Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.
Embryonic-type neuroectodermal tumor (ENT; previously referred to as primitive neuroectodermal tumor, PNET) of the testis and gynecologic tract share morphologic features with small round blue cell tumors, including Ewing sarcoma (ES), yet are biologically, therapeutically, and prognostically distinct. The diagnosis of ENT can be challenging, and it is unclear if there are reliable biomarkers that can be used to confirm this diagnosis. This study characterized 50 ENTs arising from the testis (n=38) and gynecologic tract (n=12; 7 ovary/5 uterus) with 27 biomarkers (AE1/AE3, ATRX, CD99, chromogranin-A, Cyclin D1, Fli-1, GFAP, GLUT-1, IDH1/2, INSM1, MTAP, NANOG, Nestin, neurofilament, NKX2.
View Article and Find Full Text PDFAn integrated approach is proposed to rapidly evaluate the effects of anticancer treatments in 3D models, combining a droplet-based microfluidic platform for spheroid formation and single-spheroid chemotherapy application, label-free morphological analysis, and machine learning to assess treatment response. Morphological features of spheroids, such as size and color intensity, are extracted and selected using the multivariate information-based inductive causation algorithm, and used to train a neural network for spheroid classification into viability classes, derived from metabolic assays performed within the same platform as a benchmark. The model is tested on Ewing sarcoma cell lines and patient-derived xenograft (PDX) cells, demonstrating robust performance across datasets.
View Article and Find Full Text PDFEur J Surg Oncol
August 2025
Royal Orthopaedic Hospital, Birmingham, United Kingdom.
Introduction: Pelvic bone sarcomas are rare, heterogeneous malignancies that present significant diagnostic and therapeutic challenges. Despite advances in imaging, surgical navigation, and multidisciplinary care, it remains unclear whether these innovations have improved outcomes across all histiotypes.
Material And Methods: We conducted a retrospective cohort study of 475 patients surgically treated for primary pelvic bone sarcomas between 2003 and 2022.