Review article: towards consistency in the endoscopic diagnosis of Barrett's oesophagus and columnar metaplasia
Bibliographic record
Abstract
Barrett's oesophagus is associated with severe reflux disease and is a risk factor for oesophageal adenocarcinoma. However, there is a lack of consensus on how to assess the presence and extent of Barrett's oesophagus in clinical practice. A diagnosis of Barrett's oesophagus is currently based on the recognition of an abnormal oesophageal mucosa at endoscopy. However, a diagnosis cannot be made solely on this basis, and a true diagnosis requires the identification of an area suspicious for columnar metaplasia at endoscopy, followed by histological confirmation. Currently, difficulties in the assessment of Barrett's oesophagus include a lack of consistent definitions of endoscopic landmarks (such as the gastro-oesophageal and squamo-columnar junctions), a lack of standardization of descriptions of the extent of Barrett's oesophagus, and limited communication between the endoscopist and the pathologist, which hampers accurate histological confirmation. It is therefore important to develop an endoscopic description of Barrett's oesophagus, with a clear definition of endoscopic landmarks, to determine, amongst other things, whether anti-reflux therapy produces regression or a reduction in the length of Barrett's oesophagus. With this background, a subgroup of the International Working Group on the Classification of Oesophagitis was charged with developing a simple, practicable classification system, suitable for use with standard endoscopes, which would be easy to apply in clinical practice and in large clinical studies. Described in this review are a series of propositions and an overview of the 'CM classification', developed by the International Working Group on the Classification of Oesophagitis, to facilitate the endoscopic description of Barrett's oesophagus. It is hoped that these propositions will be the first step in the development of standard endoscopic diagnostic criteria for Barrett's oesophagus, relevant to clinical practice and clinical research.
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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 | 0.008 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.004 | 0.004 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.012 | 0.005 |
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".