A Rare Calcified Complication of Epidural Injections for Lumbar Spinal Stenosis: A Case Presentation and Literature Review
Bibliographic record
Abstract
BACKGROUND: Neurogenic claudication secondary to degenerative lumbar stenosis is typically managed with nonsurgical options, such as epidural corticosteroid injections. As a standard and effective treatment for lumbar stenosis, clinicians must be aware of the corticosteroids choice when injecting in the epidural space. CASE REPORT: A 62-year-old man presenting with sciatic pain is treated with multiple neuroforaminal, facet, and caudal corticoid injections over the course of several months without any symptomatic resolution. A magnetic resonance imaging of his lumbar spine revealed focal bilateral central stenosis at the L4-L5 level. A computed tomography revealed hyperdense lesions at that level. The patient was referred for a surgical option. He underwent complete minimally invasive resection of the bilateral lesion with instrumented and interbody fusion. The final pathology report identified the mass as a calcified granuloma. CONCLUSIONS: Following repetitive methylprednisolone acetate injections, one must be aware of all the potential complications arising from particulate corticosteroids. KEY WORDS: Spinal stenosis, epidural injections, granulomas, corticosteroids
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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 | 0.001 | 0.001 |
| 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) | 0.000 | 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".