Cutaneous Mycoses

Question 1

Tinea (dermatophytes)

Answer 1

= clinical name for dermophyte, cutaneous fungal infxn

branching septate hyphae visible on KOH w/ blue fungal stain

a/w pruritus

Question 2

Tinea capitis

where?
p/w

Answer 2

on head/scalp

p/w LAD, alopecia, scaling

Question 3

Tinea corporis

where?
looks like what
acquired where?

Answer 3

on torso

erythematous scaling rings & central clearing “ringworm”

acquired from infected dog/cats

Question 4

Tinea cruris

where?
looks like what

Answer 4

inguinal area

doesn’t show central clearing

Question 5

Tinea pedis

three varieties

Answer 5

interdigital

moccasin distribution

vesicular type

Question 6

Tinea unguium

where?

Answer 6

onychomycosis

occurs on nails

Question 7

Tinea versicolor pityriasis
malassezia spp.

morphology?
pathogenesis
common when?
microscopy

Answer 7

yeast like fungus (not dermatophyte)

degradation of lipids produfces acids that damage melanocytes & cause hypo/hyperpigmented and/or pink patches

more common in summer

microscopy: “spaghetti & meatballs”