Glioblastoma, IDH-wildtype, with a novel MEF2D-NTRK1 gene fusion: a case report - Report - MDSpire

Glioblastoma, IDH-wildtype, with a novel MEF2D-NTRK1 gene fusion: a case report

  • By

  • Anaya Dewey

  • Joaquina C. Baranda

  • Wei Zhang

  • Mohammad Haeri

  • Brian Milligan

  • Tolga Tuncer

  • May 28, 2026

  • 0 min

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Clinical Report: IDH-Wildtype Glioblastoma Featuring MEF2D-NTRK1 Fusion

Overview

This case report details a 56-year-old woman with IDH-wildtype glioblastoma exhibiting a rare MEF2D-NTRK1 gene fusion. The findings highlight the molecular characterization and treatment strategies employed, including the use of tyrosine kinase inhibitors.

Background

Glioblastoma (GBM) is a highly aggressive brain tumor with poor prognosis. The presence of gene fusions, such as MEF2D-NTRK1, is rare but may influence treatment decisions. Understanding the molecular profile of GBM can guide personalized therapeutic approaches.

Data Highlights

No numerical data or trial data provided in the source material.

Key Findings

  • The patient was diagnosed with glioblastoma, IDH-wildtype, CNS WHO Grade 4.
  • Next-generation sequencing revealed a rare MEF2D-NTRK1 gene fusion.
  • The patient underwent subtotal resection followed by concurrent temozolomide and radiotherapy.
  • Various tyrosine kinase inhibitors were considered for potential treatment, including entrectinib and larotrectinib.
  • The report discusses the potential for resistance to tyrosine kinase inhibition in this context.

Clinical Implications

The identification of rare gene fusions in glioblastoma may necessitate tailored treatment strategies. Clinicians should consider molecular profiling to inform therapeutic decisions, especially in cases with unique genetic alterations.

Conclusion

This case underscores the importance of molecular characterization in glioblastoma and the potential role of targeted therapies in managing rare gene fusions.

Related Resources & Content

  1. Acta Neuropathologica, 2025 -- Uncommon IDH hotspot mutations in dysembryoplastic neuroepithelial tumors broaden the range of IDH-mutated central nervous system tumors
  2. Acta Neuropathologica, 2018 -- Identification of a New FGFR2-INA Fusion in Low-Grade Mixed Neuronal-Glial Tumors Promoting Oncogenesis Through MAPK and PI3K/mTOR Pathway Activation
  3. Acta Neuropathologica, 2024 -- Diagnosis of IDH-wildtype Glioblastoma with Predominant Leptomeningeal Involvement via Nanopore Sequencing of Cell-Free DNA from Cerebrospinal Fluid
  4. Acta Neuropathologica, 2022 -- NTRK Gene Rearrangements as Potential Therapeutic Targets in Malignant Peripheral Nerve Sheath Tumors Associated with Neurofibromatosis Type 1
  5. Central Nervous System Tumors Treatment (PDQ®) - NCI, 2025
  6. Updated EANO guideline on rational molecular testing of gliomas, glioneuronal, and neuronal tumors in adults for targeted therapy selection, 2024
  7. Central Nervous System Tumors Treatment (PDQ®) - NCI
  8. Updated EANO guideline on rational molecular testing of gliomas, glioneuronal, and neuronal tumors in adults for targeted therapy selection—Update 1 | Neuro-Oncology | Oxford Academic
  9. https://academic.oup.com/neuro-oncology/article-abstract/26/Supplement_8/viii95/7890313

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