Facial Dermatoses Flashcards
What diseases might impact the nasal planum
DLE
MCP
PF
Why should you not biopsy an ulcer
because there is no epidermis
What diseases have acantholytic keratinocytes
1) PF
2) Pyoderma
3) Dermatophytosis
How might vitiligo not be a cosmetic disease
Sundamage and can lead to SCC
What are good sunscreens for dogs
Sunfree (Verbac)
non inflammatory melanocyte destruction
no other structural change
well demarcated
Vitiligo
What is treatment for Vitiligo
No treatment- just cosmetic
Requires sunscreen
What breeds get idiopathic nasal hypopigmentation
Retrievers nad Huskies
Hypopigmentation of the nose that happens in Retrievers and Huskies
Idiopathic nasal hypopigmentation
How do you treat idiopathic nasal hypopigmentation
No treatment
Sunscreen not required
What does epitheliotropic cutaneous T cell lymphoma look like
Depigmentation
Heavy scale
Crust
Pruritus
Completely flat nasal planum (no architecture)
What kind of dogs are predisposed to epitheliotropic cutaneous T cell lymphoma
older dogs
What is the prognosis of epitheliotropic cutaneous T cell lymphoma
not good, very poor
How do you diagnose epitheliotropic cutaneous T cell lymphoma
Biopsy
What breeds get VKH like syndrome
Akita - other breeds possible
How do dogs with VKH like syndrome typically present
Severe bilateral uveitis- usually first
Blindness
Depigmentation
Crusting/ulceration
For VKH like syndrome, what is paramount
treating eyes is paramount and emergent
What kinds of dogs get idiopathic nasal hyperkeratosis
Older dogs
Cockers
Brachycephalics
How do you treat idiopathic nasal hyperkeratosis
Treat just like footpad hyperkeratosis
-Humectants, keratolytics
Should you use vaseline for derm issues
Never
What could idiopathic nasal hyperkeratosis lead to
pyoderma
What might cause unilateral nasal hyperkeratosis
Xeromycteria
-Parasympathetic innervation to lateral nasal gland (otitis media)
parasympathetic de-innervation to lateral nasal gland leads to
Xeromycteria
What might cause Xeromycteria
Otitis media
What might otitis media cause
1) Xeromycteria
2) Facial nerve paralysis
3) Respiratory signs
How do you treat Xeromycteria induced nasal hyperkeratosis
same as other hyperkeratosis - Humectants, keratolytics
With multifocal to generalized facial dermatoses you should always investigate
Bacteria, yeast, Demodex
may not be the primary cause
What should you do for yeast/bacterial pyoderma
Cytology
What should you do for demodex
deep skin scrape
What should you do for dermatophytosis
Fungal culture / PCR
What should you do if cytology is negative
Consider biopsy
1) DLE
2) PF
3) Zinc responsive dermatosis
4) Vasculopathy
5) Allergic dermatitis
6) Sterile pyogranulomatous dermatitis
(NO infectious etiologies)
What onset does eosinophilic folliculitis and furunculosis have **
Acute onset
Where does eosinophilic folliculitis and furunculosis typically occur
Snout / Nasal planum junction
focal and severe
nodules and ulcers
How do you cure eosinophilic folliculitis and furunculosis
Prednisone - curable
2mg.kg q24h for one week, then taper until resolition
quick response
What might cause eosinophilic folliculitis and furunculosis
suspected arthropod hypersensitivity
What will you see on impression smear cytology with eosinophilic folliculitis and furunculosis
Eosinophils (and sometimes bacteria)
Mast cells can also be there
