Questions tagged [dermatology]

Use this tag for questions about skin, nails or hair. This includes questions about normal structure or function as well as diseases or pathology.

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Impact on the skin of the razor blade touches it during shave? [closed]

I have been seeing in YouTube descriptions of why a traditional safety razor is better than the cartridge razor for the skin. The major point is comparing 1 blade vs 5 or 7 blades of a cartrige e.g. ...
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6 votes
1 answer
138 views

Why do herpes virus infections (apart from chicken pox) resolve without dermatological sequelae?

OK, first, needed research and a bunch of other articles. I've seen hundreds of cases of recurrent HV infections (labialis, zoster, etc.) uncomplicated by secondary infection, some of which looked ...
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3 votes
1 answer
176 views

How do clinicians prevent haloperidol-induced seborrheic dermatitis?

I understand that seborrheic dermatitis is a possible side effect of haloperidol, an old, widely used, typical anti psychotic drug. Assuming that this reported side effect is real and not a mistake, ...
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3 votes
1 answer
79 views

Where, in the human skin, would lidocaine cream stop but lidocaine injections won't?

In some medical procedures lidocaine is injected and in some others it is topically administered as a cream. Histologically speaking, where, in the human skin, would lidocaine cream stop but lidocaine ...
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1 vote
0 answers
33 views

What's optimal from a cosmesis standpoint between applying a single or a double freeze-thaw cycle to treat a thick seborrhoeic keratosis?

I'm reading contradictory statements. {2} states: Two freeze/thaw cycles (with a shorter freeze time) are more effective for thicker lesions such as seborrhoeic keratosis and warts. However, {3} ...
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1 vote
0 answers
19 views

What's the success rate of Imiquimod Cream 5% recommended for the treatment of facial superficial basal cell carcinoma beyond 5 years post-treatment?

I have read several studies on the success rate of Imiquimod Cream 5% for the treatment of facial superficial basal cell carcinoma, however none of them looked at beyond 5 years post-treatment. E.g. {...
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2 votes
0 answers
27 views

What is the difference in cosmesis of the treatment of a seborrheic keratosis between cryotherapy and electrodesiccation?

There exist different treatments to remove a seborrheic keratosis (SK), such as cryotherapy and electrodesiccation {1}. I wonder what the difference in cosmesis of the treatment of a seborrheic ...
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1 vote
0 answers
11 views

Does combining silicone gel therapy and pressure therapy help scar reduction (vs. using just one of these therapies)?

The 2015 review {1} mentions different therapies for scar reduction, including: Treatment Description Advantages Disadvantages Pressure therapy Application of elastic bandages or pressure garments ...
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0 votes
0 answers
20 views

Does ingesting itraconazole pills increase the likelihood of success for a topical cream (Imiquimod/5-Fluorouracil) to treat BCC?

The 2014 phase II trial {1} indicates that oral itraconazole is beneficial for the treatment of basal cell carcinoma (BCC). Imiquimod 5% cream and topical 5-Fluorouracil (5-FU) have also been used to ...
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3 votes
0 answers
23 views

Why are some areas of the face more likely to have basal cell carcinoma (BCC) recurrences than others?

BCC = basal cell carcinoma. I read on {4}: Certain clinical and pathological features of BCC are associated with an elevated risk for recurrence after treatment. Recurrent BCC may reappear months to ...
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1 vote
0 answers
15 views

How accurate is reflectance confocal microscopy (RCM) to predict whether a basal cell carcinoma (BCC) is infiltrative or superficial?

Reflectance confocal microscopy (RCM) is a noninvasive imaging technique that has been used to diagnose basal cell carcinoma (BCC). How accurate is RCM to predict whether a BCC is infiltrative or ...
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2 votes
1 answer
32 views

Is it true that freckles have zero potential for malignant transformation?

This New York City dermatologist called Dr. Bobby Buca on this web page says: "Freckles and moles have two things in common: there is a genetic tendency to get them, and both are darker than the ...
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3 votes
0 answers
33 views

Probability to develop a new type of melanoma

I saw that there are different types of melanoma: some are more aggressive and others are less dangerous. From what I understood searching on web, the causes of melanoma are not clear but there are ...
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1 vote
1 answer
117 views

Is there a method to distinguish nail from skin, for example examination under a microscope?

Is it possible to distinguish parts of toenail from skin, for example under a microscope? Say I had a hypothesis that some toenail material had wound its way down the toe and spread out under the sole ...
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What percentage of facial basal cell carcinomas (BCC) are superficial or infiltrative?

I read here (mirror): Superficial basal cell carcinoma: Approximately 10-15% of all BCCs are of this type. This is the most common pattern seen in BCCs of the shoulder. The solid (nodular) type ...
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0 votes
1 answer
66 views

Why do shave biopsies and punch biopsies used to diagnose suspected facial basal cell carcinomas measure a few mm instead of being below 1mm?

Given a neoplasm of uncertain behavior of skin on a patient's face that is suspected to be a basal cell carcinoma (BCC), the typical first step is to perform a shave biopsy to determine the type of ...
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0 votes
1 answer
62 views

Why isn't imiquimod cream used prior to performing a biopsy used for suspected facial basal cell carcinomas?

Given a neoplasm of uncertain behavior of skin on a patient's face that is suspected to be a basal cell carcinoma (BCC), the typical first step is to perform a shave biopsy to determine the type of ...
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1 vote
1 answer
44 views

Does any drug/cream help prevent DNA damage post UV exposure?

I read on https://medicine.yale.edu/news-article/sun-damage-occurs-even-after-sunset/: When UV light hits the skin , it causes a type of DNA damage known as a cyclobutanepyrimidinedimer (CPD) , in ...
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0 votes
0 answers
25 views

Dermapen scar removal

Is Dermapen treatment really works on scars? I saw this Image in online . I have a doubt about is this really improve scar disappearing.
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0 votes
0 answers
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What is the tratment with less side effects for generalised hyperhidrosis?

Treatment options for generalised primary hyperhidrosis Seems like all the treatments have some kind of risk, and i`m thinking i should start with the most secure treatment. I have an appointment with ...
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1 vote
0 answers
31 views

To what extent do UV-A, UV-B and UV-C exposure account for visible signs of aging in the skin? I'm looking for a breakdown between UV-A, UV-B and UV-C

Several studies indicate that UV exposure account for between 80% to 90% of visible signs of aging in the skin. E.g., from {1}: UV exposure may account for up to 80% of visible signs of aging in the ...
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0 votes
0 answers
19 views

Is there any known correlation between stomach worms and fungal skin infections?

Is there any literature which points to correlation between worm infestation of the intestines and fungal infection of the skin? The possible mechanism being the stomach worms disrupting natural ...
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0 votes
0 answers
16 views

Studies in which supplements help with skin hydration and elasticity for eczema or dermatitis

I've found in this article that 3g/d of collagen tripeptide for 4 to 12 weeks notably improved skin elasticity and hydration. I wanted to know of studies that show similar benefits for other ...
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0 votes
1 answer
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For how long does the application of topical retinoids increase photosensitivity?

I read on https://www.medscape.com/viewarticle/726464_6: Owing to potential photosensitivity, topical retinoids are best applied at night and patients should not expose themselves to excessive UV ...
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5 votes
1 answer
111 views

Can foods one is not allergic to exacarbate atopic dermatitis?

Several physicians (incl. two profesors in allergology, regarded among highest authorities in allergology in my country) told me and insisted that people with atopic dermatitis must avoid certain ...
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0 votes
0 answers
26 views

How to treat blisters on burnt skin after initial period?

In google, there are plenty of articles about what to do (i.e. First Aid) when you get skin-burn (doing this or that...etc..). However, I was unable to find any solid article that refer to treating of ...
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1 vote
0 answers
19 views

Does alternating silicone sheets with silicone gel yield a better scar reduction than using silicone sheets or silicone gel alone?

ScarAway's packaging mentions (ScarAway is one of the main brands for silicone gels and silicone sheets in the United States): For best results: Use as part of a complete scar treatment regimen, ...
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2 votes
1 answer
75 views

What is the difference in cosmesis of the treatment of a seborrheic keratosis between cryotherapy and curettage?

There exist different treatments to remove a seborrheic keratosis, such as cryotherapy and curettage+electrodesiccation {2,3}. I wonder what the difference in cosmesis of the treatment of a seborrheic ...
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1 vote
0 answers
23 views

Why may a small basal cell carcinoma (BCC) treated with radiation be much more aggressive than it appears on the surface?

I read on https://www.skincancer.org/blog/ask-the-expert-why-am-i-having-surgery-to-remove-a-small-basal-cell-carcinoma/ (mirror): In addition, a small BCC in an area previously treated with ...
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0 votes
1 answer
59 views

Do 50% of individuals with a history of BCC will develop another one within 5 years of diagnosis regardless of the age of the individual?

https://skinio.com/education/basal-cell-carcinoma/ (mirror) says: Patients diagnosed with BCC should be examined by their dermatologist at least twice a year. Remember, 50% of individuals with a ...
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-1 votes
1 answer
27 views

How accurate is dermoscopy to predict if a skin lesion is a basal cell carcinoma (BCC), and if it is, whether it is superficial or aggressive form? [closed]

https://dermnetnz.org/cme/dermoscopy-course/dermoscopy-of-basal-cell-carcinoma/ mentions that one can use dermoscopy to diagnose basal cell carcinoma (BCC) and their subtype (nodular, superficial, etc....
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0 votes
0 answers
45 views

Why isn't Imiquimod Cream 5% recommended for the treatment of superficial basal cell carcinoma located on the face?

I read on Approval Package for Imiquimod Cream, 5% on February 25, 2010 (mirror): Reference Drug (NDA number): Aldara® (imiquimod) 5% Cream (NDA 20-723), Graceway Pharmaceuticals. Date of approval: 2/...
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0 votes
0 answers
25 views

How effective is topical fluorouracil to treat facial superficial basal cell carcinoma (BCC) after Imiquimod 5% cream failed to treat it?

Both Imiquimod 5% cream and topical 5-Fluorouracil (5-FU) have been used to treat basal cell carcinoma (BCC) with a fair amount of success (~60 to 90% success rate at 5-year follow-up) {1}. Imiquimod ...
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0 votes
1 answer
94 views

Which criteria are used to choose whether to perform a shave biopsy or a punch biopsy to diagnose suspected facial basal cell carcinomas?

Given a neoplasm of uncertain behavior of skin on a patient's face that is suspected to be a basal cell carcinoma (BCC), the typical first step is to perform a shave biopsy to determine the type of ...
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0 votes
0 answers
27 views

Should Imiquimod 5% cream be applied 1 cm beyond the target tumor when treating a facial basal cell carcinoma, and if so, why?

I read on https://www.accessdata.fda.gov/drugsatfda_docs/label/2004/20723s016lbl.pdf (mirror): 364 patients with primary superficial basal cell carcinoma (sBCC) were treated with Aldara Cream or ...
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-2 votes
1 answer
87 views

What is the success rate of topical imiquimod 5% cream to treat infiltrative basal cell carcinoma (BCC)?

What is the success rate of topical imiquimod 5% cream (US brand: Aldara) to treat infiltrative basal cell carcinoma (BCC)? So far I've only found some case study {1} and some study on using topical ...
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0 votes
1 answer
75 views

Is Imiquimod 5% cream (US brand: Aldara) helpful as an adjunctive treatment of a facial basal cell carcinoma (BCC) prior to a Mohs surgery?

I wonder whether Imiquimod 5% cream (US brand: Aldara) is not helpful as an adjunctive treatment of a facial basal cell carcinoma (BCC) prior to a Mohs surgery. Helpful in this context means 1) ...
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1 vote
1 answer
82 views

How frequently does the use of topical fluorouracil cream result in permanent scarring and/or skin discoloration?

I wonder how frequently the use of topical fluorouracil cream results in permanent scarring and/or skin discoloration (e.g., hyper- or hypopigmentation). What I have found so far doesn't give any ...
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0 votes
1 answer
82 views

How effective is topical fluorouracil to treat facial superficial basal cell carcinoma (BCC)?

I wonder how effective topical fluorouracil is to treat facial superficial basal cell carcinoma (BCC). What I have found so far doesn't give any source supporting their claims or I cannot access them: ...
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-1 votes
1 answer
148 views

How frequently does the use of topical imiquimod result in permanent scarring and/or skin discoloration?

I wonder how frequently the use of topical imiquimod cream results in permanent scarring and/or skin discoloration (e.g., hyper- or hypopigmentation). What I have found so far doesn't give any source ...
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1 vote
1 answer
87 views

Why isn't fine needle aspiration (FNA) biopsy used to diagnose suspected facial basal cell carcinomas?

Given a neoplasm of uncertain behavior of skin on a patient's face that is suspected to be a basal cell carcinoma, the typical first step is to do a shave biopsy to determine the type of basal cell ...
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3 votes
0 answers
47 views

What is the reason for pink discoloration in pink disease or acrodynia

Pink disease or acrodynia is a reaction to large doses of amalgam. It is an uncommon mercurial toxicity reaction in which skin is involved. According toWikipedia: Acrodynia is a condition of pain and ...
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  • 1,020
4 votes
1 answer
120 views

Does the damage from sun exposure outweigh the benefit of getting vitamin D?

I have read some articles where they recommend a direct exposure to the sun of about 20 to 30 minutes, others say that 10 to 15 minutes, another that 5 minutes is enough, etc. I suppose it depends on ...
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  • 191
2 votes
0 answers
49 views

Endoderm And Ectoderm

According to Wikipwdia: Ectoderm is one of the three primary germ layers in the very early embryo. The other two layers are the mesoderm (middle layer) and endoderm (most proximal layer), with the ...
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3 votes
0 answers
122 views

Seboorrheic Dermatitis, Fungi, Environmental Factors

How can seborrheic dermatitis not be caused by poor hygiene as the assotiation for dermatology said? Wouldn't poor hygiene at least aggravate the condition? The treatment is mainly antifungal. And ...
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2 votes
1 answer
64 views

What kind of health effects do beards have, if any?

Do having beards have any health effects? I suppose it depends on the type and the hygiene of the beard, e.g., having a very long, dirty beard might create a suitable environment for bacterias to ...
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1 vote
2 answers
321 views

Are soap-free cleansers effective against COVID-19

It is recommended to regularly wash hands with soap to slow the spread of COVID-19. However regularly washing with soap can be harmful to the skin. Soap-free cleansers such as QV Wash are frequently ...
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  • 111
3 votes
1 answer
149 views

How deep into the skin do topical acne medications penetrate?

Given a topical gel that is a mixture of dapsone (6%), an antibiotic spironolactone (5%), an androgen blocker niacinamide (2%), a form of Vitamin B3 and skin brightener How deep into the skin do ...
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0 votes
0 answers
50 views

Are there a plastic surgery conditions of a "double chin" or "triple chin"?

Executing Is there a plastic surgery condition of a "double" or "triple" chin? as a search query in three search engines (Google, Bing, DuckDuckGo) and looking at images brought me almost no results ...
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1 vote
0 answers
43 views

How dangerous for the human skin are naturally occurring wavelengths above 380nm?

I read on https://www.cancer.org/cancer/cancer-causes/radiation-exposure/uv-radiation.html: UVA rays have the least energy among UV rays. These rays can cause skin cells to age and can cause some ...
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