P.129 Carotid artery coil extrusion: a rare but potential complication of endovascular coiling in post radiated neck
Bibliographic record
Abstract
Background: Endovascular coiling is a minimally invasive technique for managing carotid blowout in head and neck malignancies. Internal carotid artery (ICA) coil extrusion is a rare complication of this procedure, with an increased risk in post radiated neck. Methods: We present a case of advanced nasopharyngeal carcinoma with cervical nodal metastasis treated with chemoradiation and complicated with left ICA blowout which was successfully coiled and embolized endovascularly. Results: He was subsequently presented with left-sided nosebleed. Imaging demonstrated patent occluded left ICA, however with extrusion of coil material into the nasopharynx which was most likely attributed by the soft tissue necrosis in the left parapharyngeal space. He was managed conservatively as his symptoms was mild and self-limiting. Subsequent follow-up imaging confirmed stable coil extrusion. Conclusions: This case highlights the importance of identifying and assessing coil extrusion on imaging, which includes assessment of the location of extrusion, vessel occlusion patency, and potential causes of extrusion. Goals of management for symptomatic patients aims to remove extruded foreign bodies and stabilize the wound to prevent massive bleeding or further coil migration.
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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 | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.009 | 0.005 |
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".