Progressive Soft Tissue Swelling in a Pediatric Patient Leading to the Diagnosis of Fibrodysplasia Ossificans Progressiva: A Case Report
Bibliographic record
Abstract
Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disorder characterized by progressive heterotopic ossification (HO) and congenital malformation of the great toes. This case describes a 5-year-old Caucasian girl who initially presented with painless neck and back swelling as well as severe limitation of movement in the neck and shoulder girdle, who was diagnosed as FOP following tissue-based genetic testing revealing the ACVR1 (p.Arg206His) pathogenic variant. The diagnostic process, which included imaging, skin biopsy, and a thorough infectious and autoimmune workup, emphasized the challenges in identifying FOP due to its rarity; however, bilateral congenital hallux valgus, often present in FOP, can be a clue for early diagnosis. While corticosteroids provide temporary relief, long-term management now includes palovarotene, a novel therapy to suppress HO.
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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 | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.004 | 0.003 |
| Insufficient payload (model declined to judge) | 0.002 | 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".