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Setha: Derm! > Lecture Material > Flashcards

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1
Q

What are the layers of the skin?

A

Epidermis, dermis, and subcutaneous layer

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2
Q

What type of epithelial cells is the epidermis?

A

Stratified squamous epithelium

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3
Q

How thick is the epithelium?

A

0.05mm to 1.5mm

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4
Q

What are the functions of the skin and nails?

A

-Physical barrier: prevents fluid loss and entry to toxic chemicals, organisms and trauma -temperature regulation -protection against UV radiation -Synthesis of Vit. D -Sensation

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5
Q

“Peach fuzz” body hair on children and adults, not effected by hormones

A

Vellus

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6
Q

Characteristics of both vellus and terminal hair

A

Intermediate hair

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7
Q

Growth phase; duration average of 3 years

A

Anagen

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8
Q

Degenerative stage; duration few weeks

A

Catagen

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9
Q

Resting phase; length varies by body site

A

Telogen

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10
Q

Fine hair that covers fetus that is discarded after birth

A

Lanugo

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11
Q

Hair shaft shedding 25-100 per day

A

Effluvium

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12
Q

How thick is the dermis?

A

0.3mm to 3.0mm

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13
Q

What are the functions of hair?

A

-Protection -Regulation of temperature -Evaporation of perspiration -Sensation

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14
Q

What is it important to do what evaluating the patient’s skin?

A

MAKE SURE TO UNDRESS THE PATIENT

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15
Q

Scalp, beard, axilla, pubic-area: growth influenced by hormones

A

Terminal hair

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16
Q

inflammation of the skin

A

dermatitis/eczema

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17
Q

Sx of acute phase of dermatitis

A
  • Pruritis
  • redness
  • vesicle formatio
  • oozing crusting
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18
Q

Sx of subacute phase of dermatitis

A
  • pruritis
  • reddness
  • scaling
  • parches or scalded appearance
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19
Q

Sx of chronic phase of dermatitis

A
  • lichenification due to scratching/itching
  • hyperpigmentation
  • excoriation
  • fissuring
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20
Q

Results from contact by irritating substance. direct toxic effect on skin

A

contact dermatits

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21
Q

What are common agents for contact dermatitis?

A
  • Abrasives
  • cleaning agents
  • caustic agents
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22
Q

What are the acute and chronic rashes seen in contact dermatitis?

A
  • Acute
    • erythema
    • vesicles
    • erosion
    • crusting
  • Chronic
    • papules
    • plaques
    • crusts
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23
Q

T-cell mediated response that occurs in individuals that have become sensitized

A

Allergic contact dermatitis

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24
Q

Causes of allergic contact dermatitis?

A
  • Topical medications
  • jewlery
  • rubber
  • disinfectants
  • cosmetics
  • plants (most commonly poison ivy)
25
What acute and chronic rash is seen with allergic contact dermatitis?
* Acute * Erythema * Vesicles * Erosions * Crusting * Chronic * Papules * Plaques * Crusts
26
What type of testing is done for allergic contact dermatitis?
Patch testing after the dermatitis resolves
27
What is the most common fo all mucocutaneous infections?
Superficial fungal infections
28
What causes most superficial fungal infections?
overgrowth of mucocutaneous microbiome, invading skin & mucosal sites * Candida species * Malassezia species * Dermatophytes
29
Superficial infection that may involve any cutaenous or mucous surface of the body
Candidiasis
30
What is the most common cause of Candidiasis?
Candida albicans
31
Risk factors for mucocutaneous candidias?
* Diabetes * Pregnancy * Obesity * HIV/AIDS * Systemic antibiotics * Oral corticosteroids * OCP & IUD * Warm/humid climate * Moist/occluded sites
32
What lab exams should be carried out for dx of mucocutaneous candidiasis?
* Direct microscopy with KOH prep * Pseudohypae & budding yeast * Culture to identify Candida albicans/rule out secondary infection
33
Patches & pustules on erythematous base **"beefy red"** become eroded & confluent, sharply demarcated, **"satellite lesions"** **pruritis, tenderness, pain**
Candidal intertrigo
34
What is the distribution of Candidal intertrigo?
Axillae, groin (perineal, intergluteal cleft)
35
What will be on the diff dx with candidal intertrigo?
* Psoriasis * Erythramsa * Pityriasis versicolor * Tinea cruris
36
Management of candidal intertrigo?
* Topical antifungal (eg Nystatin cream), oral antifungals
37
Prevention of candidal intertrigo?
keep area dry, use imidazole powder
38
Irritability, discomfort with urination/defecation, changing diapers; erythema (**"beefy red"**), edema with papular & pustular lesions
Diaper dermatitis
39
Distribution of diaper dermatitis?
Genital & perianal skin, inner aspects of thighs/buttocks
40
Diff dx with diaper dermatitis?
* eczema * psoriasis * irritant dermatitis
41
Prevention of diaper rash?
Keep dry
42
Management of diaper rash?
Topical antifungals (eg Nystatin cream)
43
White-curd like plaques on mucosal surface that when removed with dry gauze leaves erythematous mucosal surface
Oropharyngeal candidiasis (“thrush”)
44
Distribution of Oropharyngeal candidiasis (“thrush”)?
Dorsum of tongue, buccal mucosa, hard/soft palate
45
Diff dx with Oropharyngeal candidiasis (“thrush”)?
* Leukoplakia * condyloma acuminatum * geographic tongue * lichen planus * hairy tongue * SCC
46
Management of Oropharyngeal candidiasis (“thrush”)?
* Correct precipitating cause (eg d/c inhaled corticosteroids) * topical antifungals (eg Nystatin suspension)
47
What % of women experience at least 1 episode of Vulvovaginitis candidiasis?
75%
48
\>20% of women have vaginal colonization by...
C. albicans
49
Abrupt onset, vaginal discharge/soreness, pruritis, burning, dyspareunia, that may occur before menses Vulvar/vaginal erythema and edema, curd-like white plaques
Vilvovaginitis candidiasis
50
Diff dx with Vilvovaginitis candidiasis?
* Trichomoniasis * bacterial vaginosis * lichen planus * lichen sclerosis
51
Management of Vilvovaginitis candidiasis?
Oral antifungal (eg fluconazole) or intravaginal prep (many OTC)
52
Etiology of Balanitis?
Uncircumsized men
53
**Pruritis, itching/burning** Papules, pustules, erosions; white plaques under foreskin
Balanitis
54
Diff dx with Balanitis?
* Psoriasis * Eczema * Lichen planus
55
Which infection should you consider treating sexual partner if reinfection ooccurs?
Balanitis
56
Management of Balanitis?
Topical nystatin ointment and warm soaks BID to relieve pruritis/burning
57
Superficial overgrowth of Malassezia furfur (lipophiic yeast that normall resides in the keratin of skin & hair follicles) under favorable
Pityriasis versicolor
58
Risk factors of Pityriasis versicolor?
* sweating * tropical climate * poly skin * aerobic exercise * application of cocoa butter
59

Setha: Derm! (4 decks)

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