Viral skin conditions Flashcards
Which virus group causes warts?
Human Papillomavirus
4 features of common warts
Most common in kids + YA
Commonly resolve spontaneously
Elevated, hyperkeratotic skin papules with a rough greyish-white or light brown surface.
“Cauliflower-like” surface
Tx for common warts
Cryotherapy
Debridement + Topical salicylic acid
Common sites of common warts
Hands
Knuckles
Knees
4 features of plantar warts
Small area of thickened skin covering small black dots produced by thrombosed capillaries
Often painful
Soles + palms
Grouped = Mosaic pattern
Tx for plantar warts
Topical salicylic acid
Cryotherapy
4 features of skin lesions in molluscum contagiosum
Pearl-like, smooth, firm papules
Umbilicated
Whit, translucent or slightly yellow
In clusters of <20 on trunk/ extremities
Transmission of molluscum contagiosum
Direct skin contact
Contagious for as long as lesions are visible
What family of viruses does molluscum contagiousum belong to?
Poxviruses
Ix for molluscum contagiousum
Dermoscopy
Tx for molluscum contagiosum
Self-limiting, spontaneously resolving in 1-2 years
Topical Potassium Hydroxide (if desire tx)
Cryotherapy (if small no.)
4 features of primary type 1 HSV infection
Whitish vesicles evolve to yellowish ulcers on the tongue, throat, palate + inside the cheeks
Fever
Swollen gums, painful eating
Lymphadenopathy
Ix for HSV
Swab blister fluid
PCR
3 features of primary type 2 HSV infection
Painful vesicles, ulcers, redness + swelling around the genitals
Fever
Tender inguinal lymphadenopathy.
3 features of secondary HSV infection
Irregular cluster of small, closely grouped, often umbilicated vesicles on a red base.
Itching or burning
+/- fever, pain + lymphadenopathy
Tx for HSV
Acyclovir PO
Complication of HSV in those with atopic eczema
Eczema herpeticum
3 features of eczema herpeticum
EMERGENCY- spreads quickly
Widespread eruption, often involves face
Extensive crusted papules, blisters + erosions
Systemically unwell with fever, lymphadenopathy + malaise
Tx of eczema herpeticum
Acyclovir PO/ IV
+/- Abx
3 features of chickenpox
Primary = Varicella
Prodrome: fever, malaise, pharyngitis
Vesicular pruritic rash (Macule-Papule-Vesicle)
3 features of shingles
Reactivation of VZV = Herpes zoster
3 features of the rash in shingles
Erythematous maculopapular rash- clear vesicles- pustulate + crusts
Dermatomal distribution, NOT crossing midline
Pain + pruritus
Tx for VZV
Famciclovir / Valacyclovir PO
Analgesics
What complication may arise if the trigeminal nerve is infected by VZV?
Blepharitis
Conjunctivitis
Corneal ulceration
Blindness.
Reason for taking antivirals with shingles
Reduce risk of post-herpetic neuralgia
