Bevacizumab-Associated Bowel Perforation Causing Evisceration
Bibliographic record
Abstract
Bevacizumab is a monoclonal antibody that targets vascular endothelial growth factor (VEGF) and inhibits angiogenesis in solid organ tumors. Its use in conjunction with fluorouracil-based chemotherapy for the management of metastatic colorectal cancer (CRC) has proven effective. There is a known, rare chance of gastrointestinal perforation associated with its use. We present a case of a man in his 70s on bevacizumab for metastatic rectal cancer, who presented to the hospital with small bowel evisceration through perforation at his colostomy site, ostensibly caused by a chronic parastomal hernia and bevacizumab chemotherapy. He required emergent surgery. After undergoing resection of an ischemic segment of small bowel, the perforated segment of his colon, and primary repair of his parastomal hernia, and fashioning of a new end colostomy, he recovered well and left the hospital two weeks later. After discharge from the hospital, he was able to continue with palliative chemotherapy.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| 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 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".