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Malignant peripheral primitive neuroectodermal tumor of the kidney
Ales Vicha1, Eva Stejskalova, David Sumerauer
1Department of Pediatric Oncology, Second Faculty of Medicine, Charles University, Prague, Czech Republic.
Cancer Genetics and Cytogenetics
|January 28, 2003
Summary
This study details a rare case of a 9-year-old girl with a kidney primitive neuroectodermal tumor. Molecular analysis confirmed the diagnosis and detected minimal residual disease, crucial for Ewing family of tumors research.
Area of Science:
- Oncology
- Pediatric Oncology
- Molecular Pathology
Background:
- Ewing family of tumors (EFT) are aggressive, typically affecting children and young adults, primarily in bone but also soft tissues.
- While localized EFT has a >60% 5-year survival, metastatic disease presents a poor prognosis.
- Primitive neuroectodermal tumors (PNET) are a subset of EFT, often presenting as small round-cell tumors.
Observation:
- A rare case of a visceral PNET involving the kidney in a 9-year-old girl is presented.
- Diagnostic methods included immunohistochemistry (MIC2 protein expression), cytogenetics, and molecular biology.
- The tumor exhibited strong MIC2 expression and the characteristic t(11;22)(q24;q12) translocation.
Findings:
- Histopathological diagnosis of peripheral primitive neuroectodermal tumor was confirmed.
- The specific translocation t(11;22)(q24;q12) was identified via cytogenetics and RT-PCR.
- Minimal residual disease was detected in the bone marrow using RT-PCR.
Implications:
- This case highlights the importance of comprehensive diagnostic techniques for rare EFT presentations.
- Early detection of minimal residual disease is critical for refining treatment strategies in pediatric PNET.
- Understanding rare visceral PNETs contributes to improved management of aggressive pediatric cancers.