Weekly vinblastine in chemotherapy-naive children with unresectable or progressive low grade glioma: A Canadian cooperative study.
Bibliographic record
Abstract
10029 Background: Vinblastine has shown promising activity in a phase II study in children with recurrent/refractory LGG. The aim of this study was to assess the activity of vinblastine in chemotherapy naïve children. Methods: Patients < 18 years old with unresectable or progressive LGG were eligible if they had not received any previous treatment with chemotherapy or radiation. Vinblastine was administered weekly at a dose of 6 mg/m2over a period of 70 weeks. Patients who showed progression on 2 consecutive imaging studies or evidence of clinical progression were removed from treatment. Results: 54 patients (23 female) were enrolled between 2007 and 2010. Median age at inclusion was 7 years, 13 patients were < 3 years. 32 had chiasmatic/hypothalamic tumours, 6 had evidence of dissemination. 13 had neurofibromatosis type 1. Histology was pilocytic astrocytoma (25), pilomyxoid astrocytoma (4), low grade astrocytoma variant (8); 17 patients had no histological diagnosis. Treatment was well tolerated; however, only 14 patients received full dose for the duration of the study. Most common toxicity was haematological: 40 patients who experienced grade 3+ neutropenia. There were only 6 episodes of febrile neutropenia, 3 RBC transfusions and no toxic death. Best response to chemotherapy was assessed centrally by an independent radiologist: 1 CR, 10 PR, 3 MR, 28 SD, 12 PD, for a response rate of 24.5%. With a median follow-up of 2 years (9-48 months), progression-free survival at 2 years was 72.1% (95%CI: 58.1-82.2). One patient died of progression. Conclusions: Weekly vinblastine is well tolerated in paediatric LGG patients. Although the response rate appears inferior to other common LGG regimens, progression free survival at 2 years favourably compares to most currently used regimens. Supported by a grant from the Ontario Institute Cancer Research. Clinical trial information: 1000011227.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".