Bibliographic record
Abstract
A 67-year-old male presented with shortness of breath, irregular heart rhythm, and swollen legs, which had started 4 months previously. He had a previous history of simultaneous quadruple aortocoronary bypass and Ravitch-type repair of the pectus excavatum (Figure 1A) 6 years previously, with successful postoperative course. An electrocardiogram showed atrial fibrillation. Chest pain was absent, and all vein grafts were intact on coronary angiography. Chest computed tomography showed a partially calcified mediastinal mass measuring 6 cm in size (Figure 1B), compressing the right ventricle (Video 1) and right pleural effusion. A transthoracic echocardiogram showed that cavity size and systolic function of the right ventricle were reduced by the mass and also that the inferior vena cava was dilated consistent with increased right atrial pressure. Left ventricular systolic function was preserved. We excised the mass, which had a hard shell (Figure 1C), and performed intraoperative electrical cardioversion. Rhythm was successfully reverted, and the postoperative course was uneventful. The patient was asymptomatic with regular pulse 3 months after surgery. Histological examination indicated chronic hematoma. This late presentation may represent a chronic expanding hematoma (1). Most cases of chronic chest hematoma have been reported in the context of trauma (2) or surgery for tuberculosis (3, 4).
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| 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".