Bibliographic record
Abstract
Only two cases of squamous cell carcinoma of the duodenum have been reported in the literature. The author herein reports a case of squamous cell carcinoma of the duodenum. A 75-year-old man was admitted to our hospital because of nausea, vomiting, and weakness. An endoscopic examination revealed a duodenal tumor. The tumor was circumferential elevated one with duodenal obstruction, and located in the descending part near and distal to the ampulla of Vater. Imaging modalities also detected the duodenal tumor, but did not show tumors of other locations including the pancreas. The duodenal tumor was different from ampullary tumor and pancreatic tumor. Six biopsies were obtained from the duodenal tumor. All the six biopsies showed malignant cells arranged in a medullary pattern. The malignant cells showed hyperchromatic nuclei, and mitotic figures were scattered. Keratinization and intercellular bridges were recognized. The pathologic features were interpreted as a squamous cell carcinoma of the duodenum. The carcinoma was pure squamous cell carcinoma without differentiation into adenocarcinoma or endocrine carcinoma. Operation was not possible because of the patient's age and weakness. The patient was treated by chemotherapy and radiation, but he showed a downhill course. Metastases emerged, and he died of systemic metastasis 17 months after the first presentation. Autopsy was not performed.
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 | 0.000 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.004 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.002 |
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".