Paraspinal Intramuscular Hemangioma at L5-S1 With Concurrent Disc Herniation
Bibliographic record
Abstract
Intramuscular hemangiomas are rare, benign vascular tumors, with very few reported cases arising in lumbar paraspinal muscles. We describe the seventh documented adult case involving a 39-year-old male presenting with acute severe right-sided S1 radiculopathy. Magnetic resonance imaging (MRI) identified an 8.0 × 3.0 × 3.3 cm lesion within the erector spinae muscles at the L5-S1 level, accompanied by concurrent right-sided L5-S1 disc herniation compressing the S1 nerve root. Conservative treatment initially alleviated radicular pain, but persistent back pain and diagnostic uncertainty necessitated further evaluation. Negative metastatic screening and an inconclusive computed tomography (CT)-guided biopsy led to surgical excision, revealing an intramuscular hemangioma with significant adipocytic stromal components. This case highlights diagnostic challenges and underscores the importance of including vascular lesions in the differential diagnosis of persistent back pain, particularly when coexisting spinal pathologies complicate clinical presentation.
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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".