Bibliographic record
Abstract
Aneurysmal bone cysts (ABC) are uncommon non-neoplastic expansile lesions of the bone. They usually affect long bones and vertebrae in childhood and early adulthood. Skull involvement is quite rare. Only a few cases of orbital involvement were described in the literatures. We are presenting a case of ABC that affects the orbit causing proptosis and external ophthalmoplegia. An 11-year-old girl known to have a chronic seizure disorder and school performance difficulties presented with a four month history of rapidly progressing left orbital swelling and redness. This was associated with double vision, occasional throbbing headache and feelings of nausea. The patient and her family denied any history of trauma. Her past medical and family histories were otherwise non-contributory. Physical examination revealed a left eye proptosis with mild conjunctivitis (Figure 1). She had complete left external ophthalmoplegia with pupil sparing. The left orbit was non-tender with no detectable bruit. Visual acuity in both eyes was 20/20 (right) and 20/50 (left). Fundoscopic examination revealed mild papilledema in the left eye. The rest of the physical examination was essentially normal. Computerized tomography scan of the brain revealed a left fronto-orbital expansile bony lesion with multiple cystic compartments, distorting the left orbital roof (Figure 2). The lesion pushed the eye globe laterally and externally. Magnetic resonance imaging of the left orbit confirmed that the lesion was extradural, displacing rather than infiltrating the left frontal dura, causing mass effect on the left frontal lobe.Within the lesion, the cystic components exhibited fluid-fluid levels (Figure 3 a,b,c).
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.004 | 0.003 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".