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Case Reports
. 2020 Feb 3:4:PO.19.00272.
doi: 10.1200/PO.19.00272. eCollection 2020.

Prolonged Complete Response With Combined Dabrafenib and Trametinib After BRAF Inhibitor Failure in BRAF-Mutant Glioblastoma

Marina Kushnirsky  1 , Lynn G Feun  2   3 , Sakir H Gultekin  4 , Macarena I de la Fuente  1   2
Affiliations
Case Reports

Prolonged Complete Response With Combined Dabrafenib and Trametinib After BRAF Inhibitor Failure in BRAF-Mutant Glioblastoma

Marina Kushnirsky et al. JCO Precis Oncol. .
No abstract available

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Conflict of interest statement

The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated unless otherwise noted. Relationships are self-held unless noted. I = Immediate Family Member, Inst = My Institution. Relationships may not relate to the subject matter of this manuscript. For more information about ASCO's conflict of interest policy, please refer to www.asco.org/rwc or ascopubs.org/po/author-center. Open Payments is a public database containing information reported by companies about payments made to US-licensed physicians (Open Payments). Lynn G. FeunResearch Funding: Merck Sharp & Dohme (Inst)Macarena I. de la FuenteConsulting or Advisory Role: Agios, Puma Biotechnology, Foundation Medicine, FORMA Therapeutics No other potential conflicts of interest were reported.

Figures

FIG 1.
FIG 1.
Magnetic resonance imaging (MRI), axial postgadolinium T1-weighted imaging. (A) Baseline brain MRI images, before starting dabrafenib and trametinib (D+T), demonstrated progression of disease into the surgical cavity, as well as new lesions in the left insular region and midbrain. (B) Brain MRI images at 1 month after initiation of D+T, confirming > 50% decrease of all measurable enhancing lesions. (C) Brain MRI images at 7 months of D+T, demonstrating disappearance of all enhancing disease.
FIG 2.
FIG 2.
Histologic features at diagnosis. (A) Hematoxylin and eosin stain (40× magnification). (B) Hematoxylin and eosin stain (20× magnification).Tumor sample demonstrating an infiltrative cellular astrocytic neoplasm with fibrillary background, nuclear atypia, mitoses, and vascular proliferation; consistent with glioblastoma, WHO grade 4.
FIG 3.
FIG 3.
Histologic features at tumor recurrence (second resection). (A) Glial fibrillary acidic protein immunohistochemical stain (20× magnification). (B) Hematoxylin and eosin image (40× magnification). Second resection shows a similarly high cellular malignant astrocytoma with nuclear atypia, focal gemistocytic morphology, abundant fibrillary processes, vascular proliferation, and mitoses.
See this image and copyright information in PMC

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