Difference between revisions of "Skin Other - Pathology"

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[[Seborrhea]]
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#REDIRECT[[:Category:Integumentary System - Pathology]]
 
 
 
 
 
 
 
 
===[[Sebaceous Adenitis]]===
 
 
 
 
 
==Pigmentation disorders==
 
===Hypopigmentation===
 
*Leukoderma or vitiligo - loss of pigment in the skin
 
*Leukotrichia - loss of pigment of the hair
 
*Hypopigmentation or incomplete albinism - generalised reduction of pigment in skin or hair
 
*Albinism - inherited lack of pigment
 
*Dilution - reduced pigmentation
 
*Can be localised or generalised, idiopathic or asociated with other diseases
 
*Examples of hereditary conditions: Maltese dilution of cats, Chediak-Higashi syndrome, leukoderma and leukotrichia of Dobermans, Arabian fading syndrome
 
*Asociated with some immune-mediated disorders, ''e.g.'' [[Discoid Lupus Erythematosus|discoid lupus erythematosus]]
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
 
 
===Hyperpigmentation===
 
[http://w3.vet.cornell.edu/nst/nst.asp?Fun=Image&imgID=1782 Image of endocrine hyperpigmentation from Cornell Veterinary Medicine]
 
*Results from irritation or inflammation, pigmented neoplasms or [[Endocrine effects on the skin - Pathology|metabolic diseases]]
 
*Lentigo - circumscribed macular or slightly raised plaque with epidermal hyperplasia and hyperpigmentation
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
 
 
==Eosinophilic infiltration==
 
===Eosinophilic plaques===
 
*Common in cats
 
*Medial thighs and abdomen mostly involved
 
*Often associated with hypersensitivity
 
*Grossly:raised plaques, erythematous, pruritic, erosed or ulcerated
 
*Microscopically: acanthosis, spongiosis, erosions or ulceration, predominantly eosinophilic dermatitis, possibly areas of collagen degeneration
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
 
 
===Eosinophilic granulomas===
 
*Involves cats, dogs, horses
 
*Collagen degeneration in lesions os eosinophil degranulation
 
*Often involved in reaction to parasites, foreigh bodies or mas cell tumours
 
*Grossly:
 
**Papules, nodules, plaques, ulcers in skin
 
**Nodules or ulcers in oral mucosa of cats and dogs or on foot pads of cats
 
*Microscopically:
 
**Nodular dermatitis or stomatitis
 
**Fragments of degenerated collagen surrounded by eosinophils and macrophages
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
 
 
 
 
===Eosinophilic folliculitis and furunculosis===
 
*Rare in cats, dogs, cattle and horses
 
*Possibly due to arthropod bites
 
*May be multifocal in horses
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
==Sterile granulomatous disorders==
 
 
 
===Juvenile pyoderma===
 
*Also known as '''Juvenile sterile granulomatous dermatitis and lymphadenitis, juveline cellulitis, puppy strangles'''
 
*Involves dogs of less then 4 months of age
 
*Grossly: pustular and nodular dermatitis with oedema involving the face, ears, mucocutaneous junctions
 
*Microscopically: granulomatous or pyogranulomatous perifolliculitis, paniculitis and dermatitis
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 
 
 
===Equine generalised granulomatous disease===
 
*Also known as '''Sarcoidosis'''
 
*In horses
 
*Rare
 
*Involves cutaneous lesions and systemic disease causing anorexia and weight loss
 
*Grossly: alopecia, scales, crusts, sometimes nodules and masses
 
*Microscopically: multifocal granulomas, multinucleated giant cells
 
 
 
 
 
[[Category:Integumentary System - Pathology]]
 

Latest revision as of 18:33, 22 February 2011