spongiotic dermatitis tinea
DESCRIPTION
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Spongiotic Dermatitis - Tinea
• The most likely diagnosis is?
a) Nummular dermatitis
b) Psoriasis
c) Contact Dermatitis
d) Berloqu dermatitis
e) Tinea Corporis
Question
Spongiotic Dermatitis - Tinea
Tinea (ringworm) is a dermatophyte infection of the skin
Fungal Infection of body/scalp can occur at any age and is more common in warmer climates
Spongiotic Dermatitis - Tinea
There is a broad manifestation of lesion size and location
This variability is explained by differences in host immunity and species of fungus
Spongiotic Dermatitis - Tinea
In classic ringworm, lesions begin as flat, scaly spots that then develop a raised border extending out in all directions.
The central area may become brown or clear, and has less scale than the advancing border
The vesiculobullous reaction pattern - dermatophyte The prototypical lesion of tinea
corporis is an annular scaly patch that may occur singularly or in multiple forms
Frequently polycyclic rings occur. Additional features are
involvement of the hair follicle with a fungal folliculitis or inflammation with pustules, vesicles, and crusting.
Spongiotic Dermatitis - Tinea
• Clinically, dermatophyte infections are classified by body region.
Spongiotic Dermatitis - Tinea
Tinea Faciale
Tinea corporis
Tinea cruris
Tinea Capitis
Tinea Manum
The vesiculobullous reaction patthern - dermatophytosis
The vesiculobullous reaction pattern - dermatophyte
• Dermatophytes are classified in several ways. The ringworm fungi belong to three genera: Microsporum, Trichophyton, and Epidermophyton.
• The anthropophilic dermatophytes grow only on human skin, hair or nails
• Zoophilic varieties originate from animals, but may infect human.
• Geophilic dermatophytes live in soil but may infect humans.
• KOH prep reveals hyphae
The vesiculobullous reaction pattern -dermatophytosis
• The dermatophytes include a group of fungi (ringworm) that under most conditions have the ability to infect and survive only on dead keratin, that is, the top layer of the skin , the hair, and the nails
• They cannot survive on mucosal surfaces such as the mouth or vagina where the keratin layer does not form
• Treatment is antifungal creams for tinea corporis• Oral antifungals for tinea capitis and tinea unguium
• This dermatitis best represents
a) Vitiligo
b) Post inflammatory hypopigmentation
c) Psoriasis
d) Albinism
e) Tinea Versicolor
Question
Tinea Versicolor• Caused by the yeast Malassezia
furfur • It manifests clinically as white or
light brown macules that may be discrete or confluent, on the trunk especially.
• Usually asymptomatic • May cause some itching• Chest and back are usual
location
Tinea Versicolor
• Versicolor means multiple colors• The patches may be
hyperpigmented
Tinea Versicolor
Tinea Versicolor
Tinea Versicolor
• Scales scraped from lesions and placed in KOH may be scrutinized by conventional microscopy
• Short, blunt hyphae and small spores (Spaghetti and meat balls)
Tinea Versicolor
• Woods light exam helps to evaluate the extent of the disease
Tinea Versicolor - Therapy
• For localized disease, administration of topical antimycotics, such as azoles, or selenium sulfide in a shampoo eliminates the causative organisms.
• For widespread lesions, oral ketoconazole, itraconazole, or fluconazole is curative