Chronic Hyperpigmented Scaly Plaques—Quiz Case
Bibliographic record
Abstract
A 47-year-old black woman of Haitian descent presented with a 20-year history of a persistent nonpruritic rash involving her trunk and the proximal aspect of her legs. Prior lesions had also involved her buttocks and breasts. She had tried several courses of topical steroids, with no improvement. Her medical history was remarkable for Crohn disease, which was in remission. There was no family history of similar skin lesions. Physical examination revealed well-demarcated, circular, scaly, hyperpigmented plaques with an atrophic cigarette paper texture on the trunk, thighs, and buttocks (Figure 1 and Figure 2). The findings of laboratory investigations, including a complete blood cell count, liver function tests, thyroid-stimulating hormone, albumin, and a basic metabolic panel, were normal. A chest x-ray film showed no abnormalities. The results of a potassium hydroxide preparation and a fungal culture were negative. A skin biopsy specimen was obtained from a plaque on the trunk (Figure 3). What is your diagnosis?
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.004 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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".