Cat Dermatology


Ontario Association of Veterinary Technicians. (2022). [Dermatology]. Brought to you by OAVT Seminar.

 EGC- Eosinophilic Granuloma Complex

  • Allergy related 
  • A itchy cat will lick its self with their barbed tongue which leads to self trauma 
  • Inflammatory cells come to the rescue along with  eosinophilic cells reacting creating eosinophilic plaques 
  • Often on the belly but can appear anywhere


  • Papules --> little red bumps can turn into big boulders 
  • Miliary Dermatitis --> Chances are there is an underlying allergy 
  •  Texture: millet seeds 

CLINICAL PATTERNS 

- Secondary infections caused by food allergies, compromised skin barrier and or a compromised immune system 
- Then leads to infections
- Infections are always secondary no such thing as primary infections
○ Folliculitis
○ Pododermatitis- paw infections
○ Otitis externa/interna- ear infections
○ Yeast Dermatitis 
Why?
- Pruritus- Itchy? Makes them predisposed to secondary infections 
- Non- Pruritic Alopecia- Fur loss but not Itchy ?
- Autoimmune/immune mediated skin disease? Makes them more susceptible to skin disease
- Keratinization defects 
- Lumps, Bumps and draining tracts
- Other weird stuff

ONLY SO MANY REASONS TO BE ITCHY
- Infestation 
- Secondary infections (Bacterial/fungal)
- Adverse reaction to something (Food or environmental Allergies)
- Skin Cancer Epithelial Trophic lymphoma(Cutaneous T cell lymphoma/ mycosis)
- Older Patients are more vulnerable

VENTRUM AND FLEXURE SURFACE FOR ATOPY (Food or Environmental Allergies)
- Very Similar to humans 
- Run into trouble at the flexure spots
- Classic areas in Atopic symptoms














MAPPING OUT ITCHINESS IN CATS

  • Non food & Non Flea--> Environmental Allergy 
    • Itchiness focuses on head and abdomen
    • Flea Allergies
  • Abdomen, Rump, Tail --> Food Allergies
    • Head, neck and sometimes abdomen 

  • Non Pruritic Alopecia 
    • Lost hair but not itchy 
  • Check for Symmetry Symmetric--> Endocrine (thyroid/cushings)
    • Mess up hair growth cycles, hair is trapped in resting face
    • Over production of cortisol= Allergies are an internal problem

§ Asymmetric--> Dermatophytosis (ringworm infection without itchiness)
§ Pattern Baldness--> Genetic 

PEMPHIGUS--> Gold crust around ears, in claw folds, crusting around nipples 







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