Contact Sensitization to Allergens in Synthetic Hair and Related Hair Practices: A Review
Bibliographic record
Abstract
Scalp contact dermatitis (SCD) represents a less common manifestation of contact dermatitis and is susceptible to misdiagnosis due to its atypical clinical presentations, including hair thinning, eczematous lesions, and scalp pruritus. Notably, personal care products are recognized as common etiologies in the development of SCD. Synthetic hair extensions, with prevalent use in individuals of color, are also known to cause contact dermatitis, due to allergenic components such as acrylates and disperse dyes. This review summarizes documented cases of contact dermatitis secondary to synthetic hair and provides an overview of prevalent ethnic hairstyling practices associated with synthetic hair installation. Hair styling practices detailed include braids and installation of wigs, and the related hair products that may be used to maintain these hairstyling practices. Upon surveying common hair styling products utilized, the most common hapten observed was fragrance. Ultimately, contact dermatitis stemming from synthetic hair warrants consideration as a pivotal differential diagnosis in individuals who regularly utilize synthetic hair products.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".