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Derm Lec 11 - Superficial epidermal infections

Terms in this set (47)

Cutaneous Larva Migrans

- type of breakout?
- common site?
- describe pattern of lesions
- progress cm?/ days?
- how long does it last?
- common ways of getting it?
- common location?
- creeping eruption
- common sites feet and hands
- cat and dog hookworm larvae burrowing
- thin red twisting, winding, linear lesions
- progresses at 2cm/day; may stop and rest for several days
- usually lasts 2 to 8 weeks when larva diesc but may last up to a year
- barefoot on the beach, children in
- sandboxes southeast coast of United States
Cutaneous Larva Migrans
Cutaneous Larva Migrans
Cutaneous Larva Migrans
Pitted Keratolysis

- Infected by? / layer of skin
- Organism name?
- where effected?
- describe lesion?
- multiple lesions can form?
- enviroment prime for infection?
- odor?
- bacterial infection of plantar stratum corneum
- causative organism? Kytococcus, serine proteases
- weight-bearing portions of the soles
- shallow asymptomatic discrete round pits 1 to 3 mm in diameter
- some pits become confluent, forming furrows
- sweaty feet, humid weather
- often malodorous
Pitted Keratolysis
Pitted Keratolysis
Pitted Keratolysis
KOH prep

- used for?
- scrap what for best results?
- False positives?
- Demonstration of the fungus by microscopic examination of the scrapings taken from the involved site establishes the diagnosis
- scrap the advancing edge, roof of the blister. if its scaly scrape it.
- false positives: mosaics, synthetic fibers from socks
Tinea pedis
Tinea pedis
TineaTinea pedis

- lamens name?
- caused by?
- predisposition?
- pattern?
- mistaken for?
- #hand/ #feet
- Athlete's foot
- most common fungal disease
- autosomal-dominant predisposition?
- moccasin or sandal appearance
- often mistaken for "dry skin"
- one hand two feet
Tinea pedis

- describe look of skin
- advancment of scales?
- can also presented look?
- shapes it present?
- effect in inter-digit space?
- common associated findings?
- dull erythema, silvery scaling
- scale of advancing edge pointing inward
- sometimes patchy scaly, dry scaly
- sometimes bullae or vesicles
- interdigital maceration and fissures
- hyperhidrosis common
Tinea pedis
Tinea pedis
Tinea pedis
Tinea pedis
Tinea hands
Tinea hands
Tinea hands
Majocchi Granuloma

- caused by/ name of -itis?
- describe lesion?
- occationly presents as what type of lesion?
- Common sites?
- fungal folliculitis
- circumscribed annular raised crusty boggy - occasionally pustules
- common sites: wrists and shins
Majocchi Granuloma
Majocchi Granuloma
Majocchi Granuloma
Majocchi Granuloma
Tinea corporis

- lamens name?
- describe lesion?
- progression of lesion/ time
- describe feature
- ringworm
- one or more circular, sharply circumscribed slightly erythematous, dry, scaly
- advancing scaly edge
- progressive central clearing
Tinea corporis
Tinea corporis
Tinea corporis
Tinea corporis
Tinea versicolor

- Caused by?
- Phases/ phase of growth?
- describe lesion/ pigment?
- favors what type of skin?
- common in what months?
- caused by Malassezia furfur
- Yeast phase: Pityrosporum orbiculare
- produces skin lesions when it grows in hyphal phase
- hypo- or hyper-pigmented coalescing scaly macules on the trunk and upper arms
- favors oily areas os skin
- more common during the summer months
Tinea versicolor

- common areas?
- rarely can affect?
- pain or itching?
- look on KOH stain?
- common areas: sternal area, sides of chest, back, abdomen, pubis, neck
- rarely can affect face, scalp, palms, soles
- mild itching and inflammation may be present
- KOH "spaghetti and meatballs"
Tinea versicolor
Tinea versicolor
Tinea versicolor
Tinea versicolor
Tinea versicolor
Candida albicans

- freq affect areas?
- more common areas effected?
- environment ?
- color/ look of lesions?
- occasionally lesion can present as?
- intertriginous areas frequently affected
- common areas: inframammary creases, interdigital areas, axillae, inguinal folds
- warmth, moisture, and maceration permit organism to thrive
- bright red with "satellite" lesions
- occ pustules
Candida albicans, common causes of infection?
- moist opposing skin folds
- obesity or diabetes mellitus
- immunosuppression
- pregnancy
- poor hygiene
- broad-spectrum antibiotics
Candida albicans
Candida albicans
Candida albicans
Oral Candidiasis
Oral Candidiasis
Perleche Angular cheilitis
Perleche Angular cheilitis
Perleche Angular cheilitis
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