Infections Flashcards
1
Q
HSV/VZV
Histology
A
- ballooned keratinocytes
- multinucleated keratinocytes
- peripheral margination of chromatin
- steel gray nuclei
- epidermal +/- follicular necrosis
2
Q
Molluscum contagiosum
A
Molluscum bodies (eosinophilic intracytoplasmic inclusions)
Poxvirus
3
Q
Verruca vulgaris
Histology
DDX
A
Histology:
- Verrucous epidermal hyperplasia
- HK
- PK
- Stratum corneal hermorrhage
- Prominent keratohyaline granules
- HPV
DDX: verrucous SK, atypical squamous proliferation, verrucous SCC
4
Q
Dermatophytosis and tinea versicolor
A
- Spong derm
- sandwich sign
- bullet holes
- short hyphae and spores
5
Q
Candidiasis
A
Septate pseudohyphae
6
Q
Chromoblastomycosis
A
Medlar bodes look like copper pennies
7
Q
Cryptococcus
A
Large, intracellular yeast-like
Mucin stains capsule
8
Q
Staph scalded skin syndrome
A
Cell-poor bullae
No organisms
very superficial cleavage within or just below granular layer
toxin mediated
9
Q
Histoplasma capsulatum
Histology
DDX
A
Histology:
- Small intracytoplasmic organisms with surrounding clear halo
- PAS and GMS+
DDX
- Leismaniasis (kinetoplast); Giemsa +
10
Q
Scabies
A
intracorneal burr with mite
prominent dermal eos
