Interestingly, although GH plasma level in GBM patients fell within the normal range of healthy adults (200–2000 pg/ml),31 GBMGHR high patients exhibited ∼2‐fold higher GH plasma levels than GBMGHR low patients (mean of 419 pg/ml in GBMGHR low patients vs. 1026 pg/ml in GBMGHR high patients; Figure 2E). Here, GH1 is linked to glioblastoma.