Letter regarding “Histopathology of Psoriasis Treated With Zinc Pyrithione”
Bibliographic record
Abstract
To the Editor: Dr. Aliaga raises two important questions that may prove impossible to answer. Various authorities believe they have found evidence of steroids in some product samples, but the manufacturer asserts that the absence of clobetasol propionate can be shown using special analytic techniques. Zinc pyrithione compounds currently manufactured as Skin Cap imitators in the United States do not seem to be as potent as the original, even when formulated with clobetasol, so any study should properly compare the original, a copy with clobetasol, and a copy without clobetasol. Castelijns et al. (1), studying clobetasol alone, noted no significant apoptotic cells during a two week trial, which suggests that increased apoptosis is not a prominent mechanism of plaque resolution by corticosteroid application, which does not exclude its having a therapeutic role if this product did indeed contain corticosteroids. Despite the uncertainty of the active ingredient in Skin Cap, we believe this study nonetheless has elicited some significant observations, which will be investigated in greater depth in the future. No other studies have apparently addressed this issue, and clearly more study is needed. Regrettably, the manufacturer has so far, to our knowledge, not stepped forward to assist in developing the science behind the sometimes spectacular clinical effects of this compound. Our review may be both the first and last to deal with this specific compound. We hope others will look further into the role of apoptosis in inducing psoriatic plaque resolution by this and other therapeutic modalities. Caroline G. Rowlands, M.B.B.S., F.R.C.P.C. F. William Danby, M.D., F.R.C.P.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 | 0.002 | 0.017 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.017 | 0.014 |
| 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".