Retrospective Study of the Progression of Oral Premalignant Lesions to Squamous Cell Carcinoma: A South Wales Experience
Bibliographic record
Abstract
The premalignant potential of leukoplakia is controversial. This study is intended to determine whether chronic oral "white lesions" demonstrated premalignant potential by investigating the population presented to the University Hospital of Wales in Cardiff between January 1996 and June 2000. Patient demographics are presented. During this period, 510 biopsies were performed on suspicious white lesions and 311 cases of oral cancer were diagnosed. During the same period, 11 of the 311 patients developed malignancy despite initial benign diagnosis. Thirty-four of the 510 biopsies were initially diagnosed as oral lichen planus (OLP), whereas 3 of the previously mentioned 11 were diagnosed as OLP and later developed squamous cell carcinoma. This represents an incidence of detected premalignancy in 3.5% of oral cancer cases. On re-examination of the initial biopsy specimens, these 3 cases met criteria for OLP in some areas, whereas the others appeared hyperkeratotic. These specimens may represent a subtype of premalignant chronic white lesions rather than exemplify the premalignant potential of OLP. Further direction of research will be discussed.
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| 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".