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Created page with " *Epidermal growth or differentiation disorder ===Seborrheic disease complex=== *Abnormal cornification or function of sebaceous glands *Large amounts of free fatty acids and ..."
*Epidermal growth or differentiation disorder
===Seborrheic disease complex===
*Abnormal cornification or function of sebaceous glands
*Large amounts of free fatty acids and cholesterol
*Decreased amounts of diester waxes in surface lipids
*Bacterial population changes to pathogenic [[:Category:Staphylococcus species|coagulase positive staphylococci]]
*Chronic disease affecting mainly dogs, sometimes cats and horses
*Dry form - white to grey scales
*Greasy form - scaly, excess brown to yellow lipids sticking to skin and hair
===Primary idiopathic seborrhea===
*Abnormal cornification
*Epidermal turnover reduced to about 2/3 of normal
*Microscopically:
**Hyperkeratosis distending follicular ostia causing papillary appearance
**Parakeratosis at edges of follicular ostia
**Congested, oedematous dermal papillae
**Spongiotic epidermis with leukocytes
===Secondary seborrhea===
*Develops secondarily to many types of disease (''e.g.'' [[:Category:Integumentary System - Parasitic Infections|ectoparasites]], [[:Category:Integumentary System - Mycotic Infections|fungal infections]], [[Endocrine effects on the skin - Pathology|endocrine disease]], internal disease or allergy)
*Microscopically:
**Hyperkeratosis and/or parakeratosis of follicles and epidermis
**Lesions relevant to the other disease
[[Category:Integumentary System - Pathology]]