OnlineMedEd: Dermatology - "Skin Infections"

Question 1

______________ presents as a honey-crusted lesion.

Answer 1

Impetigo

Question 2

The treatment for impetigo is __________.

Answer 2

mupirocin

Next (for larger infections) is amoxicillin or cephalexin.

Question 3

True or false: impetigo can cause rheumatic fever.

Answer 3

False

It can cause PSGN, though.

Question 4

Describe the physical appearance of erysipelas.

Answer 4

• Dark red
• Indurated
• Well-defined

Question 5

Review the “ladder” of acne treatment.

Answer 5

• 1st (for mild, non-inflamed acne): topical retinoids
• 2nd (for inflamed pustules on the face): topical benzoyl peroxide
• 3rd (for widespread acne): doxycycline/minocycline
• 4th (for refractory acne): isotretinoin

Question 6

Remember the ____________ before isotretinoin treatment.

Answer 6

pregnancy test

Question 7

Go over the names of fungal infections based on location.

Answer 7

• Foot: tinea pedis
• Groin: tinea cruris
• Trunk: tinea corporis

Question 8

All kinds of superficial fungal infections except _______________ get treated with topical antifungals.

Answer 8

tinea capitis (griseofulvin – think of the GReaSEr’s hair) and onychomycosis (terbinafine –toebinafine)

Question 9

How is the diagnosis and management of fungal infections different for tinea capitis and onychomycosis (compared with tinea cruris/pedis/corporis)?

Answer 9

Because onychomycosis and tinea capitis require long-term antifungal treatment, you need to confirm the diagnosis with a KOH prep first. The other fungal infections can be treated empirically.