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Neurofibroma and schwannoma
Rosalie E Ferner1, Michael J O'Doherty
1Department of Neuroimmunology, Division of Clinical Neurosciences, Guy's, King's and St Thomas' School of Medicine, London, UK. rosalie.ferner@kcl.ac.uk
Current Opinion in Neurology
|November 26, 2002
Summary
Recent advances in understanding neurofibromas and schwannomas, particularly in neurofibromatosis 1 and 2, highlight Schwann cell involvement in pathogenesis. Future molecular insights promise targeted therapies for these nerve sheath tumors.
Area of Science:
- Oncology
- Genetics
- Neurology
Background:
- Neurofibromas and schwannomas are benign peripheral nerve sheath tumors associated with neurofibromatosis (NF1 and NF2).
- Neurofibromin (NF1) and merlin (NF2) are tumor suppressor gene products implicated in their pathogenesis.
- Understanding these tumors is crucial for managing NF1 and NF2 patients.
Purpose of the Study:
- To review recent advancements in the clinical characteristics and pathogenesis of neurofibromas and schwannomas in neurofibromatoses.
- To synthesize current knowledge on tumor development and potential therapeutic strategies.
Main Methods:
- Review of recent scientific literature and animal models.
- Analysis of clinical data and molecularpathogenesis studies.
- Evaluation of diagnostic and therapeutic approaches for nerve sheath tumors.
Main Results:
- Animal models confirm Schwann cells initiate neurofibroma formation.
- Malignant peripheral nerve sheath tumors (MPNSTs) in NF1 have a 10% lifetime risk, requiring additional genetic events beyond NF1 loss.
- Positron emission tomography (PET) may aid MPNST diagnosis; early microsurgery or radiosurgery improves outcomes for NF2-associated vestibular schwannomas.
Conclusions:
- Molecular discoveries pave the way for targeted therapies against neurofibromas, MPNSTs, and schwannomas.
- Understanding tumor pathogenesis deepens insights into neurofibromatoses and sporadic tumor formation.
- Further research is needed to elucidate merlin's tumor suppressor function and optimize treatment strategies.