A Novel Combined Surgical and Interventional Radiology Vascular Reconstruction, With Stenting of Meso‐Rex Bypass, to Successfully Manage Recurrent Portal Venous Flow Obstruction Post Segmental Liver Transplant in a Pediatric Patient
Bibliographic record
Abstract
BACKGROUND: Portal vein complications can be difficult to manage in the context of challenging anatomy and porto-systemic collaterals. METHODS: This case illustrates a child with biliary atresia and associated laterality (situs inversus, polysplenia) features, who underwent segmental liver transplantation with portal venous conduit at 4 years of age for end-stage liver disease due to failed Kasai portoenterostomy. He subsequently developed portal venous conduit thrombosis requiring early surgical and interventional procedures. This was thought to be due to angulation of the conduit versus venous steal through multiple large portosystemic collaterals. Despite repeat angioplasty and embolization of portosystemic collaterals, he developed recurrent portal hypertension with upper gastrointestinal bleeding and persistent portal stenosis. Graft function remained well preserved. A meso-Rex bypass was therefore created 2-years 9-months post-transplant. Initial flow was excellent, but follow-up imaging revealed diminished flow and stricture at the left portal vein anastomosis. This was again thought to be secondary to steal through portosystemic collaterals and was refractory to angioplasty. Thus, a combined surgical-interventional radiology revision of the Meso-Rex bypass with laparotomy and liver mobilization, placement of an uncovered stent, portosystemic collaterals surgical ligation, and splenectomy of the main right-sided spleen was performed. RESULTS: There were no complications and, 2 years 8 months post procedure, there is excellent shunt patency and graft function with no signs of portal hypertension. CONCLUSION: This case report highlights the critical utility of a multidisciplinary approach and innovative solutions by an experienced program in the management of complex surgical complications following pediatric liver transplantation.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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 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".