Papulosquamous diseases Flashcards
What causes tinea corporis (ringworm)
Fungal skin infection caused by dermaphyte pathogens
Spread from people, animals or soil
Tinea corporis presentation
distinct red borders and dry flaky central clearing
patch may grow over time
common in humid climates or humid areas of body
Tinea corporis treatment
Antifungal cream - clotrimazole, ketoconazole, miconazole - BD until clear +48 hrs after
Pityriasis versicolor / tinea versicolor presentation
Superficial fungal infection caused by pityrosporum orbiculare (yeast on skin)
Common in early 20s
Lasts months to years
Copper/brown patches on trunk / neck / arms - resolves and turns into white patches
May itch
Associated with dandruff
PREDIPOSING FACTORS
- hot / humind weather
- high levels of cortisol - cushing’s syndrome, prolonged use of corticosteroids
Pityriasis versicolor / tinea versicolor treatment
Selenium sulfide lotion / shampoo for 15-30 mins for 7-10 days
Topical miconazole for 2 wks
Tinea cruris presentation including RF
Pruritic funal infection of groin - spares genitals
Large scaling
Well dermacated - red , tan or brown plaques
RF
- wearing tight clothing
- travelling to tropical climate
- DM
- obesity
- athletes
- male
Tinea cruris treatment
Topical antifungal - ketaconazole, clotrimazole, miconazole
What is Tinea capitus
Fungal infection of scalp
Tinea capitus presentation
4-14 yrs old
Circumscribed lesion with areas of alopecia
Boggy, erythematous lesions
May have occipital lymphadenopathy
Tinea capitus treatment
Topical
- griseofulvin for 6 - 8 wks in children
- terbinafine 2-4 wks in adults ONLY
Tinea pedis presentation
Athlete’s foot - fungal infection between toes
After walking barefoot in moist areas
Erythematous, scaling lesions
May have itching secondary to bacterial infection
Tinea pedis treatment
Topical antifungals - ketoclonazole, clotrimazole, miconzole BD for 4 wks
What is morbilliform, presentation and treatment
Drug reactions - not allergies
- occurs 7-10 days after starting medication
- maculopapular
- itchy - spares face
Tx - Antihistamines and cooling lotions
Urticarial reaction treatment
Antihistamine, cooling lotion, epinephrine if needed
Psoriasis presentation
Childhood / teenage onset
Famaily history
More common in european descent
sharply marginated erythematous papule with SILVERY WHITE SCALE
scales on sclap, palms, soles, nails, extensors (elbows/knees), lower back, perineum, anterior tibial surface
- doesnt get better with moisturiser
