Plexiform fibromyxoma located in the distal small bowel: A case report
Bibliographic record
Abstract
Plexiform fibromyxoma (plexiform angiomyxoid myofibroblastic tumour) is a rare mesenchymal tumour primarily located in the gastric antrum. Rare cases of plexiform fibromyxoma located in the oesophagus, duodenum, gallbladder and jejunum have been reported in the literature. Histologically, this tumour is characterized by a spindle to ovoid cell proliferation with a plexiform and multinodular architecture. The stroma is myxoid, fibromyxoid or collagenous with arborizing proliferation of thin-walled capillaries. There are few mitoses, no atypia and no necrosis. Immunohistochemically, the tumour cells are positive for smooth muscle actin (SMA) and vimentin. They may be positive for CD10, desmin, caldesmon and calponin. However, they are negative for DOG1, CD117 (C-Kit), EMA, ALK, S100, CD34, and B-catenin. Here, we report the first case of plexiform fibromyxoma located in the distal ileum. This plexiform fibromyxoma was also found encompassing a probable Meckel diverticulum with foci of high-grade epithelial dysplasia without invasive carcinoma. This case report highlights the importance of considering plexiform fibromyxoma in the differential diagnosis of distal small bowel spindle cell tumours with a myxoid background.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 teacher head, 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".