Heteropagus Twins with Hepatobiliary and Gastrointestinal Connectedness and Complex Cardiac Malformation in Autosite
Bibliographic record
Abstract
Introduction: Heteropagus twins are a set of conjoined twins with one being grossly abnormal, the ‘parasite’, and the other being relatively normal, the ‘autosite’. Case Report: A pair of heteropagus twins were initially identified on prenatal ultrasound and subsequently confirmed using prenatal MRI at 25 weeks gestational age. Prenatal imaging identified supernumerary limbs, accessory small bowel loops in the parasitic twin, a hypoplastic left heart in the right hemithorax of the autosite, and a shared liver and bowel between the two. Delivery occurred at 38 + 5 weeks gestation via C-section with an APGAR score of 9/9 for the autosite at both 1 and 5 minutes. MRI confirmed an interconnected autosite-parasite liver that was herniating into the left hemithorax as well as continuous autosite-parasite bowel loops. The patient underwent surgical management including resection of the parasitic twin and repair of the congenital heart defect and is now thriving. Discussion: Heteropagus twins include a spectrum of clinical entities from nonconjoined twins to intact conjoined twins. The predominant theory regarding etiology is an incomplete cleavage of a monozygotic embryo at approximately 2 weeks gestation. Following differentiation, ischemia-induced atrophy leads to the embryonic death of the parasite and hemodynamic changes in the autosite to support parasite tissues. The use of antenatal and postnatal imaging is crucial in establishing the diagnosis, management plan, and longterm prognosis secondary to the congenital cardiac malformations and degree of interconnectedness. Conclusion: This is the first reported case of heteropagus twins with co-existing hepatobiliary and gastrointestinal continuity.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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".