Glioblastoma vs Meningioma and schwannoma
How to tell Glioblastoma and Meningioma and schwannoma apart when a board question makes them look alike.
Glioblastoma is infiltrative necrotic astrocytoma; meningioma is dural whorls/psammoma; schwannoma is nerve sheath Antoni/Verocay.
Side by side
Aggressive infiltrating astrocytic tumor in adults with necrosis, pseudopalisading cells, microvascular proliferation, seizures or focal deficits, and ring-enhancing lesion that can cross the corpus callosum.
Meningioma is extra-axial dural-based mass with whorls and psammoma bodies; schwannoma is nerve-sheath tumor with Antoni A/B areas and Verocay bodies, classically vestibular schwannoma at CPA.
High-grade glial malignancy infiltrates brain parenchyma and creates necrotic, angiogenic tumor regions.
Meningioma arises from arachnoid cap cells; schwannoma arises from Schwann cells, often with NF2 association.
Pseudopalisading necrosis, microvascular proliferation, infiltrative intra-axial mass, and butterfly corpus-callosum spread support glioblastoma.
Dural tail/psammoma bodies support meningioma; CPA mass with hearing loss and Antoni A/Verocay bodies supports schwannoma.
The trap
All are adult intracranial tumors, so intra-axial versus extra-axial location and histology decide.
The repair move
For adult brain tumors, first localize intra-axial glial versus extra-axial dural or nerve-sheath origin.
Try a free question
CoreAn older adult has seizures and a necrotic ring-enhancing intra-axial mass crossing the corpus callosum. Biopsy shows pseudopalisading necrosis and microvascular proliferation. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Glioblastoma. Pseudopalisading necrosis with an infiltrative butterfly lesion supports glioblastoma.
Why the other choices are tempting
- B. Meningioma is extra-axial and dural-based with whorls/psammoma bodies.
- C. Schwannoma is a nerve-sheath tumor with Antoni/Verocay histology.
- D. Medulloblastoma is a malignant pediatric cerebellar tumor.
- E. Craniopharyngioma is a suprasellar tumor with calcification and endocrine/visual symptoms.
Flashcards
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What histology points to glioblastoma?
Pseudopalisading necrosis and microvascular proliferation point to glioblastoma.
What imaging phrase points to glioblastoma?
Butterfly lesion crossing the corpus callosum points to glioblastoma.
Quick answers
What is the fastest way to tell Glioblastoma from Meningioma and schwannoma?
Glioblastoma is infiltrative necrotic astrocytoma; meningioma is dural whorls/psammoma; schwannoma is nerve sheath Antoni/Verocay.
What is the key clue for Glioblastoma?
Aggressive infiltrating astrocytic tumor in adults with necrosis, pseudopalisading cells, microvascular proliferation, seizures or focal deficits, and ring-enhancing lesion that can cross the corpus callosum.
What is the key clue for Meningioma and schwannoma?
Meningioma is extra-axial dural-based mass with whorls and psammoma bodies; schwannoma is nerve-sheath tumor with Antoni A/B areas and Verocay bodies, classically vestibular schwannoma at CPA.
What is the common trap with Glioblastoma vs Meningioma and schwannoma?
All are adult intracranial tumors, so intra-axial versus extra-axial location and histology decide.