Related Experiment Video
Updated: May 26, 2026
Digital Spatial Profiling for Characterization of the Microenvironment in Adult-Type Diffusely Infiltrating Glioma
Published on: September 13, 2022
Addressing diffuse glioma as a systemic brain disease with single-cell analysis
Felix Sahm1, David Capper, Astrid Jeibmann
1Department of Neuropathology, Institute of Pathology, German Cancer Research Center, Heidelberg, Germany.
Objective:
To analyze infiltration patterns of IDH1 mutant diffuse gliomas into the brain by identification of single tumor cells applying an antibody specific to mutant IDH1 R132H protein.
Design:
Immunohistochemical analysis.
Setting:
University hospital.
Patients:
Whole-brain and hemisphere sections of 4 patients diagnosed with diffuse glioma.
Results:
Tumor cells were identified in areas that appeared inconspicuous macroscopically and at histological analysis with respect to cellularity, cellular pleomorphism, or mitotic activity in all cases.
Conclusion:
Detection of single tumor cells throughout the brain demonstrates diffuse glioma to represent systemic brain disease.
Insights
Single tumor cells from IDH1 mutant diffuse gliomas were found throughout the brain. This suggests diffuse gliomas are a systemic brain disease, not localized tumors.
Area of Science:
- Neuro-oncology
- Cancer biology
- Immunohistochemistry
Background:
- Diffuse gliomas are primary brain tumors.
- IDH1 mutations are common in diffuse gliomas.
- Understanding glioma infiltration is crucial for treatment.
Observation:
- Used immunohistochemistry with an IDH1 R132H specific antibody.
- Analyzed whole-brain and hemisphere sections from 4 glioma patients.
- Identified single tumor cells in macroscopically and histologically inconspicuous areas.
Findings:
- Single tumor cells were detected throughout the brain in all patients.
- Tumor cells infiltrated areas without apparent abnormalities.
- This infiltration occurred irrespective of cellularity, pleomorphism, or mitotic activity.
Implications:
- Diffuse gliomas exhibit systemic spread within the brain.
- Current treatment strategies may need to account for widespread infiltration.
- This finding redefines diffuse gliomas as a systemic brain disease.
