Cutaneous mycoses – Flashcards
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| Tinea barbae |
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| Mycelia grow into pores around hair shafts, beneath the cuticle of hairs, or in the stratum corneum layer of the skin |
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| Tinea faciei |
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| Sxs include: scaling, annular or circular lesions with raised margins. Pruritus, burning, and erythema are present |
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| Tinea faciei. |
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| Dx by hyphae with microconidia on KOH and PAS stained preparations |
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| Tinea faciei |
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| Trichophyton spp. cause cutaneous mycoses of the glabrous skin of the face, including the chin and upper lip of children and females, but excludes mustache and bearded areas of the adult male |
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| Tinea barbae |
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| Tichiphyton spp.cause cutaneous mycoses of hairy areas of the skin of the face and neck |
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| Tinea barbae |
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| mild superficial type is characterized by scaling lesions with vesiculopustular border on the bearded area of the neck and skin |
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| Tinea barbae |
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| deep pustular type has deep, follicular pustules on the bearded areas of the face and neck that result in nodular keloids and kerions with alopecia and scarring |
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| Tinea barbae |
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| hyphae growing in the stratum corneum produce edema and leukocytic infiltrations |
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| Tinea capitis-ectothrix |
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| microsporum spp. cause cutaneous mycoses of the scalp |
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| Tinea capitis-ectothrix |
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| male infections are more common before puberty, females are mainly infected after puberty |
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| Tinea capitis-ectothrix |
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| aka gray-patch ringworm, which is a prepubertal infection of the scalp, eyelashes, and eyebrows |
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| Tinea capitis-ectothrix |
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| infections start as papules in a ring form and can develop into kerions or keloids |
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| Tinea capitis-ectothrix |
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| dermatophytids can occur. Also, keratomycosis, diseased cornea. |
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| Tinea capitis-ectothrix |
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| Diagnosis is chains of macroconidia and hyphae are seen on hair shafts treated with KOH or PAS stains. |
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| Tinea favosa |
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| Found in Africa and Europe |
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| Tinea favosa |
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| ...is a form of tinea capitis that occurs when mycelia interact with scalp proteins producing dead cell masses in mats of hair and then develop into yellowish-brown, cup-shaped skin crusts with loss of hair and scarring. |
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| Tinea favosa |
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| caused by Trichophyton schoenleinii |
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| Tinea capitis-endothrix |
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| Trichophyton species casue cutaneous mycoses of the scalp known as black-dot ringworm. |
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| Tinea capitis-endothrix |
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| Conidia are found inside the hair shaft |
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| Tinea capitis-endothrix |
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| Males are more commonly affected with .... |
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| Tinea capitis-endothrix |
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| Sxs include erythematous, scaling, circular lesions with black dots that are broken off hairs |
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| Tinea capitis-endothrix |
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| Scutula can develop. |
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| Tinea capitis-endothrix |
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| Can be a chronic infection into adult life and can also result in hair loss |
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| Tinea capitis-endothrix |
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| Conidia and hyphae are seen inside hair shafts on KOH or PAS stains |
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| Tinea corporis |
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| Microsporum, Trichophyton spp. and Epidermophyton flocoosum (EMT)cause infection of the horny layer of the skin and spread circularly |
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| Tinea corporis |
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| center of the ring clears as the fungus is eliminated. |
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| Tinea corporis |
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| produces rings of inflammation on the glaborous skin, dry and scaly then pustular and crusty. Can have hyperkeratosis. |
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| Tinea corporis |
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| Two types are seen. 1. annular type- small, spreading circular areas of erythema. can be chronic 2. vesicular - vesicles and pustules behind erythematous border. usually NOT chronic. |
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| Tinea corporis |
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| Mycelia and conidiospores in scrapings of KOH and PAS preps. |
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| Tinea imbricata |
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| ONLY found in Polynesian races! Caused by Trichophyton concentricum |
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| Tinea imbricata |
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| Found in Pacific Islands, SE Asia, and Central America. |
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| Tinea imbricata |
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| Masses of hyphae accumulate in cutaneous tissue |
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| Tinea imbricata` |
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| Sxs include brownish maculopapules which gradually change into concentrically arranged, imbricated, fissured rings on ARMS and TORSO. |
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| Tinea imbricata |
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| Scaling and itching, but NO erythema or pain. Lesions are chronic |
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| Tinea imbricata |
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| Swollen hyphae with forked tips on KOH and PAS stains |
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| Tinea unguium |
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| Epidermophyton floccosum and Trichophyton spp. (ET is unique)cause cutaneous mycoses of nail plates. |
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| Tinea unguium |
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| incidence is greatest in males post-puberty and is usually associated with Tinea pedis or Tinea manuum |
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| Tinea unguium |
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| nail injury predisposes to infection |
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| Tinea unguium |
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| starts under nails, hyphae grow out into stratum corneum and produce inflammation by releasing ENZYMES that interact with skin and nail proteins. |
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| Tinea unguium |
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| Sxs include soft, friable, keratin that loosens the nail. |
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| Tinea unguium |
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| Leukonychia mycotica and Invasive subungal dermatophytosis are associated with ... |
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| Tinea unguium |
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| Hyphae and macroconidia are seen in PAS or KOH stains |
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| Tinea unguium |
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| Usually very resistant to treatment |
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| Tinea manuum |
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| Microsporum, Trichophyton spp. and Epidermophyton flocoosum (EMT) cause cutaneous mycoses of the palms and fingers |
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| Tinea manuum |
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| Most prevalent in males and usually associated with Tinea pedis |
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| Tinea manuum |
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| lesions begin as exoliative, erythematous, scaly sheets of skin that become vesicular, red circumscribed patches on the palms and fingers |
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| Tinea manuum |
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| masses of hyphae and macroconidia are seen in scrapings of KOH and PAS preps. |
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| Tinea cruris |
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| Epidermophyton floccosum and Trichophyton spp. cause cutaneous mycoses of the groin |
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| Tinea cruris |
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| hyphae invade moist areas of the groin, commonly called jock itch |
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| Tinea cruris |
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| begins as circular lesions that develop into SERPINGOUS, WELL MARGINATED, ERYTHEMATOUS LESIONS with raised borders in groin area |
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| Tinea cruris |
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| Epidermophyton and Trichophyton spp have club-shaped macroconidia with smooth walls. (ET cruises the sky.) |
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| Tinea pedis |
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| Ef and T (ET) cause cutaneous mycoses of the feet, aka athletes foot |
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| Tinea pedis |
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| breakdown in skin promotes infection that has poor immune response. NO partial protective immunity |
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| Tinea pedis |
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| seen mostly in adult MALES |
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| Tinea pedis |
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| Sxs include INTERTRIGINOUS DERMATITIS with peeling, maceration (softening), and fissuring b/w 3rd 4th and 5th toes. |
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| Tinea pedis |
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| ONLY mold from this section that does not result in partial or protective immunity |
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| Tinea faciei |
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| pts are usually 10-40 yoa |
