Questions tagged [dermatology]

Questions about diseases or disorders of the skin fall under the general tag "dermatology", which is the branch of medicine dealing with the skin. This includes the skin's structure and function as well as any disorders or diseases. It also deals with structures generated in/by the skin, e.g. sweat, oils/sebum, hair, nails, moles, warts, skin coloration and its disorders, etc.

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5 views

How to use steroid ointments [closed]

For topical steroids in the form of ointments, (specifically betamethasone biproprionate), how long do I leave it on the skin? I know that since it has petroleum jelly in it, my skin won't absorb that ...
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15 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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11 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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1answer
19 views

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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38 views

What is the meaning of a broken skin? How broken it has to be for rabies virus to go inside human body?

So, I have this doubt. I searched the internet and everywhere they mention that rabies can't go through unbroken skin but nowhere they explain what broken skin means? When I scratch myself because of ...
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24 views

Is there a standard between dermatologists not to inject numbing agents before laser treatments?

physicians often apply topical numbing agents (local anesthetics) such as Lidocaine+Prilocaine or Benzocaine+Lidocaine+Tetracaine (BLT) as a cream/ointment about 30 minutes before laser treatments. I ...
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44 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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7 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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17 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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11 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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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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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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21 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 {2,3}. I wonder what the difference in cosmesis of the treatment of a seborrheic keratosis between ...
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13 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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17 views

What is the basal cell carcinoma subtype cooccurrence matrix? (I.e., given BCC subtype A, what's the likelihood of also having BCC subtype B)

In many basal cell carcinomas (BCC), the histology shows that they coexist more than one BCC subtype. For example, a patient may have 1 skin lesion that is diagnosed as BCC of subtypes superficial+...
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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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22 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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1answer
48 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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18 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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1answer
26 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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What percentage of facial basal cell carcinomas (BCC) are superficial or infiltrative?

I read on https://emedicine.medscape.com/article/276624-workup#c8 (mirror): Superficial basal cell carcinoma: Approximately 10-15% of all BCCs are of this type. This is the most common pattern seen ...
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44 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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20 views

Why is superficial basal cell carcinoma (BCC) the most common pattern seen in BCCs of the shoulder?

I read on https://www.medscape.com/answers/276624-100162/which-histologic-findings-are-characteristic-of-superficial-basal-cell-carcinoma (mirror): Approximately 10-15% of all BCCs are of this type [...
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23 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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1answer
73 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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25 views

Why is Imiquimod 5% cream used to treat a superficial basal cell carcinoma less effective on lower limbs than the rest of the body?

I read on https://bpac.org.nz/2017/skin-cancer.aspx (mirror): It is less effective when used on lower limbs and generally impractical for the posterior trunk due to inaccessibility. Why is Imiquimod ...
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21 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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1answer
63 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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1answer
51 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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1answer
44 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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1answer
53 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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1answer
64 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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34 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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0answers
51 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 ...
1
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1answer
76 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 ...
3
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28 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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28 views

Vaseline is used to reduce scarring following keratosis. Is there a substitute ointment that will be less uncomfortable when used near the eye?

After scaling a seborrheic keratosis one typically uses Vaseline to help reduce scarring. It is uncomfortable when it goes into the eye. which may happen when the scaling was near (< 3 mm) the eye....
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1answer
95 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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40 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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85 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 ...
2
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1answer
58 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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2answers
276 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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1answer
105 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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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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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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22 views

Difference between medical and general dermatology [closed]

So I am looking at the different clinical interests of dermatologists on the clinic's website. One provider lists their clinical interests as general dermatology and medical dermatology. I'm ...
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1answer
38 views

Is there any evidence for any positive effects on body functions by alkaline spas?

When a friend asked me what she could expect from alkaline bathings, did I know of any evidence. A quick research also did not reveal meaningful data. From what I know there should be absolutely no ...
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1answer
39 views

What kind of physician, if at all, adjusts a tattoo in human-skin-color and makes such tattoos to disguise scars?

I understand from this article and from further general reading that tattooing is often done by physicians, or referred to by physicians, if a physician thinks it is the best option to disguise some ...
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0answers
161 views

Is there a standard model of scar healing and if so what are its main stages?

I have searched for a standard model of scar healing to learn how dermal scar tissues are formulated and evolved but didn't find one; rather, I found somewhat inconsistency between different ...
3
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1answer
71 views

Can the use of hydrogen peroxide in dentistry worsen the oxidative stress in patches of facial vitiligo vulgaris?

According to this study 1, hydrogen peroxide is not absorbed by the skin, but can cause systemic toxicity when inhaled or ingested. I am not entirely sure how often hydrogen peroxide is inhaled or ...

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