21- Mycosis superficialis capitis, corporis. Mycosis pedis.

what is superficial mycosis

• Caused by fungal organisms

• Dermatophytes are most common organisms causing this

• Use keratin to survive

What is tinea capitis

• Children 6-10

• Dermatophytic trichomacosis of the scalp and hair of scalp

• Cause by T. Tonsurans, M. Audonni, M canis

What is the presentation of tinea capitis

• mild scaling and broken off hair to mainly inflammatory pathces with nodules that rain pus -> resulting in alopecia if severe

• Infection can be exothrix (outside hair follicle) or endothrix (inside hair follicle)

• An "id reaction" seen as papulopustular exanthema on the trunk can happen due to host immune response to fungus

Describe tinea corporis

• Dermatophyte infection of the trunk -> T. Rubrum, tonsurans, M canis

• Sharply demarcated lesions with annular papules with or without pustules/ vesicles

What is tinea cruris

• Aka jock itch

• Subacute or cheonic dermatophytosis of the groin, pubic regions and thighs

W

What is the cause of tinea cruris

• Due to warm and humid environment in this area

• Associated with: obesity, tight clothing, GC treatment

What is the presentation of tinea cruris

• Large scaling, well demarcated red/ brown plaques

• Papules and pustules can be present towards the edges

What is tinea pedis

• Athletes foot

• Dermatophytic infection of the feet

What is the appearance of tinea pedis

• Erythematous, scaly lesions with/out bulla formation

• Commonly spreads to inguinal area, trunk, hands

• Secondary infections are very common

What is the treatment

• Topical ketaconazole, econazole, clotrimazole, terbinafine

• Systemic terbinafine, intraconazole, fluconazole, ketaconazole, griseofulvin