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Visible Lesion LO - Coggle Diagram
Visible Lesion LO
Papular/Pustular Dermatitis
Pemphigus Foliaceus
CS
Hx
: middle aged, BREEDS e.g. Akita
Pustule= Erosion= Crust
Bordered by
epidermal collarettes
Systemic:
anorexia, depression, fever
Distribution
Face: bridge of
nose,
planum nasale, pinnae, muzzle
Footpads
Claw
abnormalities
Generalised
alopecia, scaling, crusting, collarette
Dx
Cytology (neut., eosin., acantholytic keratonicytes)
Skin biopsy:
Mx
topical glucocorticoids/ tacrolimus
Systemic immunomodulators
vs Macules
= circular, flat areas of abnormally discoloured skin up to 1 cm in diameter
Cause: e
rythema, haemorrhage, skin pigmentation
Dx
Does it
blanche
? is it pruritic?
Yes= Erythematous causes e.g
. Bacterial pyoderma
No=
Coagulopathies and vasculitis
= small red spots (pus= pustules)
Papules Dx
Rule OUT=
Scabies, bacterial infection, flea bite hypersens, contact dermatitis
Investigate atopic dermatitis
Pustules Dx
Rule OUT=
demodicosis, bacterial infection, pemphigus foliaceu
s
Erosive and Ulcerative Dermatitis
Nasal Lupoid Dermatoses (D)
Sx
Breed
e.g. Collies, GSD, SHetland sheepd, Huskies
CS
Depigmentation, erythema, scaling on PLANUM NASALE
Early: slate blue/ grey with loss of cobblestone on DORSAL junction/ on alar folds
Advanced= scarring
Dx
Cytology:
while giving 2% mupirocin cream with
Abx
IF ABx dont work=
skin biopsy (histo
)
Mx
limit actinic exposure
Topical agents
Glucocorticoids
Tacrolimus
Systemic agents e.g. pred
Lifelong Tx
no systemic involvement, unknown path., Sun exposure aggrevates it
Erosion= no dermis
Ulcer= deeper (dermal), epidermis involved secondarily
Dx
Hx: systemic dz (SLE, hepatocutaneous syndrome, vasculitis), Drugs.
Derm PE
Vesicles/ pustules
Distribution
Autoimmune= benign/ face and ears and feet
Vasculitis= distal extremities, nose, ear tips
Cytology from eruptions and exudate under crusts
BEST-
skin biopsy (histo)
Nodular (non-neoplastic) dz/ Draining Tracts
Mycobacterial Panniculitis (C)
Dx
Cytology/ histo (pyogranulomatous inflammation, low n# of bacilli)
Microbiology:
of aspirate OR deep tissue samples.
PCR
: fresh/ paraffin embedded samples
CS
Early:
inguinal region/ axillae
the spreads to perineum and body wall etc.
Draining tracts with purple
"pepper pot,
" indentations
Patchy
aloepcia
Ropey areas
(skin adherent to underlying)
Watery exudate
LESIONS NOT PAINFU
L
Systemically WEL
L (usually)
Sx
OBESE cats
Mx
C and S
Combination Abx
(e.g. doxy, ciprofloxacin)
in soil, dirt, water introduced through penetrating skin wounds.
= can be life threatening and challenging.
Causes:
Bacterial (nocardia etc), Fungal/Algal (Crypto etc), Parasitic (Demodicosis), Misc (Panniculitis etc.)
Dx
EVEYTHING (culture, cytology, histo, serology, imaging)
IMPORTANT= culture
ACTIVITY: write each lesion/ pattern and what Dx steps you need to do for each