A202 PREOPERATIVE DIAGNOSIS OF JEJUNAL ADENOCARCINOMA ASSOCIATED WITH CROHN’S DISEASE DIAGNOSED, LOCALIZED AND SURVEILLED VIA DOUBLE BALLOON ENDOSCOPY: A CASE REPORT
Bibliographic record
Abstract
Abstract Background Small bowel carcinomas (SBC) are rare, accounting for only 1% to 5% of all gastrointestinal cancers. However, patients with Crohn’s disease face a significantly elevated risk of SBC. This case report outlines a rare case of preoperatively-diagnosed jejunal adenocarcinoma in a patient with long-standing Crohn’s disease with diagnosis and surveillance through double balloon endoscopy (DBE). Aims A 41-year-old female with a 30-year history of small bowel Crohn’s disease presents to the hospital with overt obscure GI bleeding. Throughout the course of her disease, she was thought to be in remission with Pentasa and 6-MP, though she had mild inflammation seen in the jejunal and neoterminal ileum visualized on magnetic resonance enterography (MRE). Subsequent oral DBE showed severe nodularity and friability throughout the jejunum with biopsies showing invasive moderately differentiated adenocarcinoma. Combined oral and rectal DBE was used to facilitate tattoo placement prior to open right hemicolectomy with jejunal resections, which was complicated by intraoperative bleed and anastomotic leak. Unusually, cross-sectional imaging with computer tomography (CT) and positron emission tomography (PET-CT) showed no GI tract enhancement or evidence of metastatic spread. Post-operatively, oral DBE found a saddle shaped deformity in the jejunum which had dysplasia on one biopsy. As a result of her complicated post-operative course, the patient is receiving regular surveillance with oral DBE every six months. Methods Balloon-assisted endoscopy (BAE) has the potential to allow for endoscopic and histopathologic examination of the entire gastrointestinal tract, which makes BAE an ideal modality for both diagnosis and surveillance in Crohn’s disease. In this particular case, DBE was able to detect a subtle jejunal lesion that was not identified on CT enterography or even a PET-CT scan, resulting in earlier detection of a small bowel adenocarcinoma that was curable with surgery. Results Currently, there is a gap in literature surrounding small bowel adenocarcinoma surveillance. This is further complicated by the lack of an established macroscopic appearance of SBC and the unknown prognostic significance of dysplasia on pathology in the context of small bowel inflammation. Further, many centres have limited access to BAE. Conclusions This case shows that it has an important, and underutilized role, in IBD management. It is currently the only methodology for visual assessment and biopsy of lesions in the mid gut. Small bowel endoscopy access should be increased in Canada with a focus on IBD patients. Development of high risk identifiers for possible small bowel carcinoma also need to be developed as part of ongoing guidelines. Funding Agencies None
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.004 | 0.002 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.005 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".