Crescendo Transient Aura Attacks
Bibliographic record
Abstract
BACKGROUND AND PURPOSE: Diagnosis of transient ischemic attack can be difficult because many mimics exist. We report the clinical and neuroimaging features of a distinct hemorrhagic transient ischemic attack mimic. METHODS: Case series. RESULTS: We describe 4 elderly patients presenting with a cluster of stereotyped somatosensory migraine auras, initially referred for "crescendo transient ischemic attacks". Neuroimaging in each patient revealed an unexpected finding of spontaneous focal subarachnoid hemorrhage conforming to a cortical sulcus in the contralateral hemisphere. We postulate that the episodic aura symptoms corresponded to recurrent cortical spreading depression triggered by the presence of subarachnoid blood, and speculate that such episodes could be a presenting feature of cerebral amyloid angiopathy in the absence of typical cerebral microbleeds or history of cognitive impairment. CONCLUSIONS: Focal subarachnoid hemorrhage can present clinically with transient repetitive migraine auras. Awareness of this entity is important because misdiagnosis as cerebral ischemic events could lead to incorrect treatment. We recommend that elderly patients presenting with a cluster of new unexplained migraine auras should be investigated ideally with MRI to detect focal subarachnoid hemorrhage.
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How this classification was reachedexpand
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 | 0.000 |
| 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) | 0.001 | 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 teacher head, 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".