ANEURYSMS OF THE DISTAL ANTERIOR CEREBRAL ARTERY
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Bibliographic record
Abstract
OBJECTIVE: The aim of this study was to present the clinical and radiological characteristics, surgical management, and outcome in a large series of patients with aneurysms of the distal anterior cerebral artery (DACA) managed in the microsurgical era. METHODS: The records of 1109 patients with anterior circulation aneurysms managed at the authors' institution between 1970 and 1998 were reviewed. RESULTS: Fifty-nine patients (5.3%) were identified with 67 DACA aneurysms. Seventy-three percent of the patients were women. The mean age of all patients was 47 years. Multiple aneurysms were identified in 51% of all patients, most commonly on the middle cerebral artery. Thirty-six patients had ruptured DACA aneurysms and 23 had unruptured aneurysms. In those with ruptured aneurysms, the admission grade was Grade I in 10 patients (27.8%), Grade II in three patients (8.3%), Grade III in 10 patients (27.8%), Grade IV in seven patients (19.4%), and Grade V in six patients (16.7%). Frontal lobe hematomas occurred in 28% of the patients with ruptured aneurysms and carried a poor prognosis. In those with unruptured aneurysms, 11 were incidental and 12 were identified after a subarachnoid hemorrhage from another aneurysm. The mean diameter was 10 mm in ruptured aneurysms and 5.8 mm in unruptured aneurysms. Fifty-eight patients underwent surgery and one patient was treated with endovascular coiling. Six patients, all with ruptured aneurysms, died. Seventy percent of survivors with ruptured aneurysms had a favorable outcome. CONCLUSION: DACA aneurysms possess a number of characteristics that distinguish them from the more common intracranial aneurysms. With modern neurosurgical and endovascular techniques, an acceptable operative morbidity and mortality can be achieved.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it