Sacroiliitis presenting as sciatica
Bibliographic record
Abstract
Department of Rheumatology and 1Department of Radiology, Guy's and St Thomas' Hospital, London, UK Sir, Sciatica is a common presentation but the underlying cause may be sacroiliitis, which differs in prognosis and treatment options. We present two cases of sacroiliitis presenting as sciatica. The first case is a 28-yr-old man who for 18 months had recurrent episodes of left buttock pain radiating down to the lower calf, typical of sciatic pain. Straight leg raising and femoral nerve stretch tests were negative and MRI of the lumbar spine showed no evidence of disc herniation. MRI of the pelvis demonstrated marked inflammation of the left sacroiliac joint. Symptoms settled gradually with ibuprofen and conservative management. He presented 15 months later with similar classical sciatica symptoms, but this time on the right side. MRI revealed right-sided sacroiliitis and the previously involved left sacroiliac joint was now normal (Fig. 1). Diagnosis of a reactive sacroiliitis was made, and symptoms resolved with non-steroidal anti-inflammatory (NSAID) therapy.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.016 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.007 | 0.005 |
| Insufficient payload (model declined to judge) | 0.003 | 0.003 |
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 source (direct Gemma or distilled Codex), 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".