This is an extract of our Skin Diseases Miliary Dermatitis Eosinophilic Plaque Eosinophilic Complex document, which we sell as part of our Small Animal Internal Disease - Skin Notes collection written by the top tier of University Of Veterinary Medicine And Pharmacy Of Kosice, Slovakia students.
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5. Skin Diseases: Miliary dermatitis, eosinophilic complex Feline military dermatitis (FMD) and Eosiniphilic Granuloma Complex (EGC) are extremely common cutaneous reaction patterns in the car MD - Papules and crust of this disease resemble millet seeds EGC - lesions affect the skin and oral cavity.
* Includes eosinophilic ulcer, eosinophilic plaque and eosinophilic granuloma Etiology Neither MD or EGC are a final diagnosis, nor are they pathognomic for any one disease Allergies - Biting insects, food, environmental allergens and rarely contact substances
* Fleas and other biting insects emphasized in EGC etiology Parasites - Fleas, demodex, cheyletiella, Notoedres, Otodectes - assoc with MD
* Fleas implicated in EGC Infectious Diseases - Staph, Strep, Pasteurella, Bacteriodes
* Dermatophytes - Microsporum Canis
* MD - Consider Malassezia
* EGC - Viral conditions are an added consideration Miscellaneous
* MD - Genetic, Immune-mediated diseases, Drug reactions, Nutritional, Idiopathic
* EGC - Genetic, Immune-mediated, Idiopathic
* Immune mediated e.g. Pemphigus foliaceus
* Nutritional e.g. biotin or F.A. deficiencies Pathogenesis of EGC:
* Pathogenic events in these lesions are most likely caused by eosinophil recruitment and degranulation. Circulating eosinophils move into tissues in reaction to inflammation prompted by antigen-antibody complexes, parasites, or microorganisms.
* Since eosinophils are attracted to and phagocytize antigen-antibody complexes, the presence of eosinophils in the EGC indicates that it is an immune-mediated disease Clinical Signs Miliary Dermatitis
* Lesions - small erythematous papules that develop into crusts
* 20 lesions arise from self trauma and produce alopecic erosions and excoriations
* Distribution - localized or generalized. Dorsal lumbosacral, cervical and inguinal regions mostly. o If head and neck are affected, consider notoedric/otodectic mange, food allergy, atopic dermatitis, pyoderma
* Additional signs - Peripheral lymphadenopathy of the inguinal L.N., Depression, Pain and twitching over affected areas Eosinophilic Granuloma Complex Eosinophilic Ulcer
* (indolent, rodent and lip ulcer) Well circumscribed, red-brown to yellow, ulcerated
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