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Related Experiment Videos

Primary endocervical extraosseous Ewing's sarcoma/PNET

G Cenacchi1, G Pasquinelli, L Montanaro

  • 1Dipartimento di Patologia Sperimentale, Istologia e Citologia Patologica M. Malpighi, Università di Bologna, Italy.

International Journal of Gynecological Pathology : Official Journal of the International Society of Gynecological Pathologists
|February 25, 1998
PubMed
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This study reports the first case of extraosseous Ewing's sarcoma (EES)/primitive neuroectodermal tumor (PNET) in the uterine cervix. Diagnosis was confirmed using molecular analysis in a patient presenting with intermenstrual spotting.

Area of Science:

  • Gynecologic Oncology
  • Skeletal and Soft Tissue Tumors
  • Molecular Pathology

Background:

  • Extraosseous Ewing's sarcoma (EES) and primitive neuroectodermal tumors (PNET) are rare malignancies typically affecting bone or deep soft tissues.
  • Primary cervical tumors are predominantly carcinomas or sarcomas, with EES/PNET being exceptionally rare in this location.

Observation:

  • A 36-year-old woman presented with intermenstrual spotting and a cystic cervical mass identified via pelvic ultrasound.
  • Surgical excision revealed a small round cell tumor, necessitating hysterectomy.
  • Histopathological, immunohistochemical (MIC2 antigen), and ultrastructural analyses were performed.

Findings:

  • Immunohistochemistry and electron microscopy indicated an EES/PNET diagnosis.
  • Reverse transcription polymerase chain reaction (RT-PCR) confirmed the EWS/ERG fusion transcript, a hallmark of EES/PNET.

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  • No evidence of extrauterine disease was found on computed tomography.

    • Implications:

    • This case establishes the first known instance of primary EES/PNET originating in the uterine cervix.
    • Highlights the importance of comprehensive diagnostic workup, including molecular testing, for rare cervical tumors.
    • The patient remains disease-free 18 months post-hysterectomy, suggesting potential for successful treatment of this rare presentation.