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Related Experiment Video

Updated: May 30, 2026

Translational Orthotopic Models of Glioblastoma Multiforme
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Metastatic brain sarcoma with gliomatous component.

Fumi Higuchi1, Hadzuki Matsuda, Yoshifumi Okada

  • 1Department of Neurosurgery, Dokkyo University School of Medicine, Mibu, Tochigi 321-0293, Japan.

Brain Tumor Pathology
|August 12, 2011
PubMed
Summary

A rare metastatic uterine carcinosarcoma presented as a brain tumor with extensive gliomatous features, challenging initial diagnosis. This case highlights the diagnostic difficulties of uterine tumors exhibiting neural differentiation.

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Area of Science:

  • Neuropathology
  • Gynecologic Oncology
  • Oncologic Imaging

Background:

  • Metastatic brain tumors pose diagnostic challenges, particularly when mimicking primary brain neoplasms.
  • Uterine carcinosarcomas are rare malignancies with a potential for divergent differentiation.

Observation:

  • A 56-year-old woman developed motor aphasia following hysterectomy for a uterine tumor.
  • MRI revealed a left frontal cystic lesion, initially treated with stereotactic radiosurgery.
  • Recurrent lesions required multiple resections, with initial diagnoses suggesting high-grade glioma due to glial fibrillary acidic protein (GFAP) positivity.

Findings:

  • Histological re-examination revealed a biphasic tumor composed of GFAP-positive gliomatous cells and GFAP-negative/CD10-positive sarcomatous cells.

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  • The metastatic lesion demonstrated extensive neural differentiation, blurring the lines between glial and sarcomatous components.
  • The tumor was ultimately diagnosed as a metastatic uterine carcinosarcoma with significant gliomatous differentiation.

    • Implications:

    • This case underscores the importance of thorough histological evaluation for metastatic tumors, especially those with unusual differentiation patterns.
    • Recognizing neural differentiation in uterine tumors is crucial for accurate diagnosis and appropriate patient management.
    • Advanced immunohistochemistry (GFAP, CD10) aids in differentiating metastatic carcinosarcoma from primary brain gliomas.