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Malignant progression in choroid plexus papillomas.

Astrid Jeibmann1, Brigitte Wrede, Ove Peters

  • 1Institute of Neuropathology, University Hospital Münster, Germany.

Journal of Neurosurgery
|October 9, 2007
PubMed
Summary
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Malignant progression of choroid plexus papillomas is rare but can occur. A small percentage of these tumors may advance to choroid plexus carcinoma, necessitating careful monitoring post-surgery.

Area of Science:

  • Neuro-oncology
  • Pediatric neurosurgery
  • Pathology

Background:

  • Choroid plexus papillomas are tumors arising from the choroid plexus epithelium.
  • Malignant transformation of these tumors is infrequently reported.
  • Systematic evaluation of malignant progression is lacking.

Observation:

  • A retrospective study analyzed 124 primary choroid plexus papillomas.
  • Histological criteria were uniformly applied.
  • Follow-up averaged 59 months after gross-total resection.

Findings:

  • Recurrence occurred in 6% of World Health Organization (WHO) Grade I papillomas and 29% of WHO Grade II atypical papillomas.
  • Most recurrences mirrored primary tumor histology and proliferation indices.
  • Two cases showed malignant progression to WHO Grade III choroid plexus carcinoma.

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Implications:

  • While rare, malignant progression of choroid plexus papillomas to carcinoma is a documented phenomenon.
  • This highlights the importance of long-term surveillance for these patients.
  • Further research into predictive markers for malignant transformation is warranted.