Q (sonnet): How many glioblastoma studies are in cBioPortal?

▶ list_studies
{
 "search": "glioblastoma",
 "limit": 100
}

◀ result
{"result":[{"cancer_study_identifier":"gbm_tcga","name":"Glioblastoma Multiforme (TCGA, Firehose Legacy)","type_of_cancer_id":"difg","sample_count":619,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_tcga"},{"cancer_study_identifier":"gbm_tcga_gdc","name":"Glioblastoma Multiforme (TCGA GDC, 2025)","type_of_cancer_id":"difg","sample_count":611,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_tcga_gdc"},{"cancer_study_identifier":"gbm_tcga_pan_can_atlas_2018","name":"Glioblastoma Multiforme (TCGA, PanCancer Atlas)","type_of_cancer_id":"difg","sample_count":592,"has_guide":true,"url":"https://www.cbioportal.org/study/summary?id=gbm_tcga_pan_can_atlas_2018"},{"cancer_study_identifier":"gbm_tcga_pub2013","name":"Glioblastoma (TCGA, Cell 2013)","type_of_cancer_id":"difg","sample_count":577,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_tcga_pub2013"},{"cancer_study_identifier":"gbm_tcga_pub","name":"Glioblastoma (TCGA, Nature 2008)","type_of_cancer_id":"difg","sample_count":206,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_tcga_pub"},{"cancer_study_identifier":"gbm_cptac_2021","name":"Glioblastoma (CPTAC, Cell 2021)","type_of_cancer_id":"difg","sample_count":99,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_cptac_2021"},{"cancer_study_identifier":"gbm_columbia_2019","name":"Glioblastoma (Columbia, Nat Med. 2019)","type_of_cancer_id":"difg","sample_count":42,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_columbia_2019"},{"cancer_study_identifier":"gbm_iatlas_prins_2019","name":"Glioblastoma (Randomized Clinical Trial, Nat Med. 2019) - iAtlas Harmonized","type_of_cancer_id":"adifg","sample_count":30,"has_guide":false,"url":"https://www.cbioportal.org/study/summary?id=gbm_iatlas_prins_2019"}]}

▶ search_oncotree
{
 "search_term": "glioblastoma"
}

◀ result
{"result":[{"code":"GB","name":"Glioblastoma, IDH-Wildtype","score":60,"mainType":"Glioma","tissue":"CNS/Brain","hierarchy":"BRAIN > DIFG > ADIFG > GB","replacedCodes":["GBM"]},{"code":"SCGBM","name":"Small Cell Glioblastoma","score":50,"mainType":"Glioma","tissue":"CNS/Brain","hierarchy":"BRAIN > DIFG > ADIFG > GB > SCGBM"}]}

═ answer (success)
I found **8 glioblastoma studies** in cBioPortal:

| Study ID | Name | Samples |
|---|---|---|
| gbm_tcga | Glioblastoma Multiforme (TCGA, Firehose Legacy) | 619 |
| gbm_tcga_gdc | Glioblastoma Multiforme (TCGA GDC, 2025) | 611 |
| gbm_tcga_pan_can_atlas_2018 | Glioblastoma Multiforme (TCGA, PanCancer Atlas) | 592 |
| gbm_tcga_pub2013 | Glioblastoma (TCGA, Cell 2013) | 577 |
| gbm_tcga_pub | Glioblastoma (TCGA, Nature 2008) | 206 |
| gbm_cptac_2021 | Glioblastoma (CPTAC, Cell 2021) | 99 |
| gbm_columbia_2019 | Glioblastoma (Columbia, Nat Med. 2019) | 42 |
| gbm_iatlas_prins_2019 | Glioblastoma (RCT, Nat Med. 2019) - iAtlas Harmonized | 30 |

Note: several of these (e.g., `gbm_tcga`, `gbm_tcga_pub2013`, `gbm_tcga_pub`, `gbm_tcga_pan_can_atlas_2018`, `gbm_tcga_gdc`) represent different processing/publication versions of the same underlying TCGA GBM cohort, not independent patient populations.

If you'd like to explore one, I recommend the PanCancer Atlas version as the current best-curated TCGA GBM dataset:

[View Glioblastoma Multiforme (TCGA, PanCancer Atlas) in StudyView](https://www.cbioportal.org/study/summary?id=gbm_tcga_pan_can_atlas_2018)