-IBIS-1.5.0-
tx
cutaneous system
tinea/ringworm
diagnoses
definition and etiology
definition:
superficial infection of the hair, skin, or nails caused by dermatophytes (fungi which invade non-living tissues of the body, e.g. superficial skin, hair, nails)
etiology:
usually classified by the area of the body affected rather than the associated microorganism
signs and symptoms
signs and symptoms: Fungal infections are often very low-grade and cause occasional scaling of the superficial dermis. Other infections cause acute reactions such as:
bulbous, vesicular lesions (common in the feet)
tinea unguium (toenails) causes nails to become thickened, with debris forming under the free edge
tinea capitis
lab findings:
skin scraping with KOH examination to confirm presence of fungus
skin scrapings may also be cultured for fungus
fluorescence under Wood's lamp is suggestive but not diagnostic
course and prognosis
Cutaneous fungal infections are common and easily treated using conventional or alternative antifungal preparations. However, these infections tend to recur in susceptible hosts, and require nonpharmacological constitutional treatment to diminish susceptibility. Secondary infections are occasionally troublesome, especially in the groin area.
differential diagnosis
tinea pedis (athlete's foot)
tinea capitis (scalp)
tinea cruris (jock itch)
other skin conditions including candidiasis, eczema, psoriasis, impetigo, pityriasis rosea, syphilis, drug reactions
footnotes