Cervical spinal schwannoma with rapid onset quadriplegia mimicking acute subarachnoid hemorrhage
Bibliographic record
Abstract
A previously healthy 56-year-old man presented with a 1-week history of progressive weakness, neck pain, and paresthesia, rapidly progressing over 24 hours to complete quadriplegia and saddle anesthesia, in keeping with an ASIA A spinal cord injury. Imaging revealed multifocal subarachnoid hemorrhage and a retro-clival lesion in the spinal canal, causing cord compression. Emergent decompressive surgery was performed. Intra-operative pathology revealed a high cervical subarachnoid hemorrhage and a spindle cell tumor, later confirmed to be a schwannoma with ruptured sclerotic vessels. Histopathologically, the tumor displayed classic features of Antoni A and Antoni B tissue types, along with S-100 positivity and low Ki-67 index. Schwannomas, when they bleed, can pose clinical and diagnostic imaging challenges due to hemorrhage obscuring the tumor, and overlapping radiological features with other spinal neoplasms. Timely recognition and multidisciplinary management are crucial for a favorable outcome. This case highlights that benign schwannomas can cause hemorrhage, rapid evacuation of which allows the usually benign clinical course and prognosis of schwannomas to supervene.
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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) | 0.001 | 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 | 0.001 |
| 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 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".