A Black Hole in a Bone — Intraosseous Lipoma
Bibliographic record
Abstract
Intraosseous lipoma is an extremely rarely diagnosed benign bone tumor. In most cases diagnostic imaging techniques, namely computed tomography (CT) and magnetic resonance imaging (MRI) are sufficient to reach a diagnosis, which in some cases is confirmed by postsurgical or postmortem histological examination. We describe 2 cases of intraosseous lipoma that were identified by practising rheumatologists at our rheumatology clinic. A 38-year-old man presented with pain in his right foot, ankle, knee, and first metatarsophalangeal joint. His history featured trauma-induced fractures of the left ankle and the right 6th rib. He did not recall any recent infection, travel, exertion, or other illness. Examination including musculoskeletal examination yielded no significant findings. Laboratory tests including metabolic panel and parathyroid hormone values were normal. Conventional radiographs of the right ankle and foot revealed a round, translucent, cystic lesion in the right calcaneal diaphysis in the trabecular bone, with areas of calcification (Figure 1a). CT scan of the lesion showed complete resorption of bone within the lesion, with the remaining tissue showing a fat …
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.006 | 0.002 |
| Insufficient payload (model declined to judge) | 0.006 | 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".