L 6 a Dermatology

A set of 10 practice flashcards covering dermatologic diagnosis, topical therapies, and specific clinical cases from the lecture.

Which physical exam sign associated with Atopic Dermatitis involves the loss of the lateral edge of the eyebrow?

Herthoge’s sign

How does an ointment vehicle differ from a cream vehicle in terms of water content and skin effects?

An ointment contains less than $20\%$ water and is occlusive, while a cream contains more than $20\%$ water and is less greasy and more easily spread.

What is the preferred clinical method to confirm a diagnosis of Tinea Corporis and what is specifically observed?

A $10\%$ KOH scrape is used to observe branching fungal hyphae.

Why are Allylamines, such as Terbinafine, often considered more effective than Azoles for treating fungal infections?

They are fungicidal, have higher cure rates and lower relapse rates, and stay in the stratum corneum longer due to high bioavailability.

What is the specific organism responsible for Acne Vulgaris mentioned in the transcript?

Cutibacterium acnes (formerly known as Propionibacterium acnes).

Which topical retinoid is described as the most effective but also the most irritating for acne treatment?

Tazarotene ($0.05\%$, $0.1\%$ cream or gel; $0.045\%$ lotion).

Under dermascopy, what vascular finding is characteristic of Basal Cell Carcinoma (BCC)?

Arborizing telangiectasias, which are sharp bright red large-stem vessels branching into fine terminal capillaries.

What is the standard surgical margin for a low-risk Basal Cell Carcinoma (BCC) excision?

$4\,mm$ margins.

Why is Mohs micrographic surgery (MMS) preferred for high-risk Basal Cell Carcinoma (BCC) in the 'mask area' of the face?

It provides the best cure rates and preserves more healthy tissue compared to standard excision.

What is the recommended application timing and total body amount for sunscreen as per the lecture notes?

Apply $15-30\,\text{min}$ prior to exposure and use approximately $6-9\,\text{tsps}$ for an average adult.