An Atlas of Lumps and Bumps: Part 6
Bibliographic record
Abstract
Molluscum ContagiosumMolluscum contagiosum is a common cutaneous infectious disease caused by a poxvirus of the molluscipox genus in the Poxviridae family.[1][2][3][4] The prevalence is approximately 7% of immunocompetent children.5 This condition is most common in children 2 to 5 years of age but is also common in sexually active teenagers and young adults.[1][2][3][4]6 Molluscum contagiosum is rare in infants.7 The male to female ratio is approximately equal.8 The virus is transmitted mainly by close physical contact with infected skin, followed by autoinoculation and, occasionally, by contaminated fomites.4 Predisposing factors include poor hygiene, poverty, overcrowding, atopic dermatitis, and immunodeficiency.1,4 Typically, molluscum contagiosum presents as discrete, smooth, firm, waxy, dome-shaped papules with characteristic central dell or umbilication (Figures 1 and 2) from which a plug of cheesy material, which contains virus particles and dead epithelial cells, can be expressed.[2][3][4]9 Central umbilication can be hard to observe in young children and small lesions.4,9 Dermoscopy aids visualization of the central umbilication, which may not be obvious to the naked eye.Dermoscopy shows a central umbilication with well-defined polylobular, roundish or 4-leaved clover-like, white to yellowish amorphous structures surrounded by a peripheral crown of reddish, linear, or branched vessels (Figure 3).The color of the lesions can be translucent, flesh-colored, pearly white, yellow, pink or red (especially when irritated or inflamed).4,10 The lesions are most common in areas of skin rubbing or moist regions.11 In children, the most commonly affected areas are the extremities (Figure 4), trunk, intertriginous areas, and genitals (Figure 5).12 Lesions on the genital areas can be mistaken for penile warts (Figure 5).In adults, particularly those who are sexually active, lesions are more common on the lower abdomen, upper thighs, pubic area, and anogenital area.1,4,12 Atypical locations include lips, 13 oral mucosa, 14 areolae, 15 nipples, 15 eyelids, 16 conjunctiva, 17 scalp, 18 and soles.12,19
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.009 | 0.009 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.112 | 0.039 |
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".