From immunotherapy to autoimmunity: reactive arthritis following intravesical BCG
Bibliographic record
Abstract
Reactive arthritis (ReA) is recognised as a sterile inflammatory arthritis triggered by infections or other antigens, including intravesical BCG used to treat non-muscle-invasive bladder cancer. Although BCG immunotherapy is highly effective, its side effects can extend beyond the genitourinary tract. We present a woman in her 60s with high-grade Ta urothelial cell carcinoma (UCC) and carcinoma in situ (CIS) who developed ReA 1 week following BCG instillation. She experienced fevers, blurred vision, mild conjunctivitis and oligoarthritis predominantly affecting her knees. Infection was ruled out by negative cultures, while elevated inflammatory markers pointed to an autoimmune aetiology. Prompt discontinuation of BCG and corticosteroid therapy led to significant clinical improvement. This case underscores the importance of recognising ReA as a potential post-BCG complication requiring multidisciplinary management. It highlights the need for intervention and follow-up.
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How this classification was reachedexpand
Direct model labels (unvalidated)
Per-model category and study-design labels from the labeling rounds. They are machine output, unvalidated, and the disagreement between models ships as data. No study design here is MEDLINE-validated yet.
| Model arm | Categories | Study design | Confidence |
|---|---|---|---|
| gemma | no category Domain: not available · Genre: Empirical About the Canadian research system: no · About a Canadian topic: no | Case report | low |
| gpt | no category Domain: not available · Genre: Empirical About the Canadian research system: no · About a Canadian topic: no | Case report | high |
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) | 0.000 | 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, unvalidatedLabeled directly by 2 models reading the full record.
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".