Pilot Study of PCNU and Cranial Radiation Therapy in the Treatment of Patients with Malignant Gliomas
Bibliographic record
Abstract
A pilot study was performed administering PCNU with radiation therapy to treat patients with high-grade astrocytomas and to explore the toxic effects of this drug regimen. PCNU at an initial dose of 110 mg/m2 i.v. was administered to 14 patients within 4 weeks after completion of cranial irradiation. Courses were repeated every 6-8 weeks upon recovery from myelosuppression. Radiation therapy consisted of 5,000 rad to the whole brain followed by an additional 1,500 rad to the tumor site. Patients were followed by CT scan and neurologic examination. The median survival for the group was 80 weeks. Larger, randomized trials comparing PCNU to other nitrosoureas will be needed to assess its value as adjuvant therapy in patients with malignant gliomas. Myelosuppression, particularly, thrombocytopenia, was the main toxic effect in this study. Pulmonary infiltrates developed in 2 patients and was progressive and fatal in 1 patient after a total cumulative PCNU dose of 850 mg/m2. Hepatic dysfunction with hyperbilirubinemia also developed in 1 patient. PCNU can produce pulmonary and hepatic toxicity similar to that reported for other nitrosoureas. Regular monitoring of pulmonary and hepatic function tests should be performed during treatment with PCNU in future trials.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".