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Dermatopathology

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Abstract

This chapter discusses gross lesions and histological changes. It provides an overview of the patterns used in dermatopathological interpretation.

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Figures

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5.4 Perivascular dermatitis (the ‘dermatitis reaction’). Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.5 Perivascular dermatitis in a canine skin sample.
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5.6 Interface dermatitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.7 Cell-rich interface dermatitis with single cell necrosis and satellitosis (arrowed) (cytotoxic dermatitis) in a canine skin sample.
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5.8 Cell-poor interface dermatitis (ischaemic dermatitis) in a canine skin sample.
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5.9 Vasculitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.10 Cutaneous vasculitis in a canine skin sample. Note the degeneration of the blood vessel wall (arrowed) and nuclear debris with microhaemorrhage in the surrounding dermis.
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5.11 Nodular and/or diffuse dermatitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.12 Nodular dermatitis due to a dermal fungal infection ( spp.) in a canine skin sample.
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5.13 Intraepidermal vesicular/pustular dermatitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.14 Subcorneal pustular dermatitis with acantholytic keratinocytes (pemphigus foliaceus) in a canine skin sample.
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5.15 Subcorneal pustular dermatitis with no evidence of acantholytic keratinocytes, degenerate neutrophils and bacteria (bacterial pyoderma) in a feline pad skin sample.
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5.16 Subepidermal vesicular/pustular dermatitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.17 Subepidermal vesicular dermatosis (bullous drug reaction) (arrowed) in a canine pinna skin sample.
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5.18 Folliculitis/perifolliculitis/furunculosis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.19 Folliculitis and furunculosis (deep bacterial pyoderma) in a canine skin sample.
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5.20 Panniculitis. Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.21 Panniculitis caused by vasculitis in a canine skin sample.
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5.22 Atrophic dermatopathy (hair cycle slowing or arrest). Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.23 Atrophic dermatopathy in a canine skin sample. Follicular keratosis (black arrow); atrophied hair follicles (yellow arrow) and epidermal atrophy (arrowhead).
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5.24 Metabolic dermatosis (parakeratotic hyperkeratosis, epidermal pallor and acanthosis; so-called red, white and blue). Drawn by S.J. Elmhurst BA Hons (www.livingart.org.uk) and reproduced with her permission.
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5.25 Metabolic dermatosis with characteristic red (parakeratotic hyperkeratosis), white (epidermal pallor) and blue (acanthosis) areas in a canine pad skin sample.
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