Allergic Pododermatitis and Viral Papilloma

Alopecia X

Allergic Pododermatitis and Viral Papilloma

Most commonly seen in Pomeranians, Poodles and Nordic breeds

Atopic Dermatitis

Allergic Pododermatitis and Viral Papilloma

Atopic Dermatitis + Secondary Infection

Belly changes Staffy with atopic dermatitis

Atopic Dermatitis + Secondary Infection

Pustules and papules due to Staph infection secondary to atopic dermatitis

Bacterial and Yeast Overgrowth

Atopic Dermatitis + Secondary Infection

Bacterial and Yeast Overgrowth

Bacterial and yeast overgrowth secondary to allergic dermatitis

Bullous Impetigo in a Dog

Atopic Dermatitis + Secondary Infection

Bacterial and Yeast Overgrowth

Severe infection after long term corticosteroid use

Calcinosis Cutis Secondary to Cushing’s Syndrome

Infection of the nose with Alternaria fungus

Cat Fungal Infection

Calcinosis Cutis Secondary to Cushing’s Syndrome

Firm skin, white deposits and inflammed

Cat Middle Ear Polyp

Calcinosis Cutis Secondary to Cushing’s Syndrome

Colour Dilution Alopecia

Note Horners syndrome (pupil constriction and drooped eyelid).

Colour Dilution Alopecia

Cutaneous Lymphoma / Mycosis Fungoides

Colour Dilution Alopecia

Chiahuahua. Most common in Dobermans

Cortisone Overuse

Cutaneous Lymphoma / Mycosis Fungoides

Effects of prolonged use of corticosteroids

Cutaneous Lymphoma / Mycosis Fungoides

Involvement of mouth

Cutaneous Lymphoma / Mycosis Fungoides

Differential diagnosis is immune mediated disease

Demodex cati Infection

Cutaneous Lymphoma / Mycosis Fungoides

Dermatomyositis in a Collie

Cutaneous Lymphoma / Mycosis Fungoides

Dermatomyositis in a Collie

Dermatomyositis is a familial disease of blood vessels (vasculitis) that is seen in Collies, Shelties, and some other breeds, especially the Jack Russell Terrier.

Typically, it has a long course of repeated skin death and scarring. Tail tips, ears, and extremities may also be involved. Sunlight makes it worse. Responds well to immuno-modulating treatment

Dermatophyte Kerion

Discoid (Cutaneous) Lupus Erythematosus

Dermatomyositis in a Collie

Fungal lesion caused by soil-based dermatophyte

Maybe inflamed and have secondary bacterial infection. Often misdiagnosed as a "Hot Spot". Differential diagnosis is tumor such as mast cell tumor or histiocytoma. Fine needle aspirate shows mixed inflammatory cells. Local and systemic anti-fungal treatment is usually highly successful.

Dermatophytosis (Ringworm) in a Cat

Discoid (Cutaneous) Lupus Erythematosus

This disease mostly responds well to immunomodulatory drugs and sun restriction

Doodle Dysplasia in a Caboodle

Hepatocutaneous Syndrome (MEN) Dog Foot

Doodle Dysplasia in a Caboodle

Doodle Dysplasia is a recently recognised follicular dysplasia in the "oodle" breeds such as cavoodles , spoodles and labradoodles. It is mainly recognised in orange coloured or pale coloured individuals. It is likely to have an inherited basis , probably through the poodle line. Biopsy is useful to exclude other diseases but the exact histological changes in the hair follicle are yet to be defined. There is no known treatment and some cases will undergo spontaneous remission. Secondary infection is possible and needs to be treated or prevented.

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Food Reaction

Hepatocutaneous Syndrome (MEN) Dog Foot

Doodle Dysplasia in a Caboodle

Severe allergic reaction to food items

Hepatocutaneous Syndrome (MEN) Dog Foot

Serious liver or pancreatic disease. Blood tests sometimes don't show how serious the problem is.

Juvenile Cellulitis

Leproid (Mycobacterial) Granuloma

Hepatocutaneous Syndrome (MEN) Dog Foot

Juvenile cellulitis in a 10-week-old puppy

Leproid (Mycobacterial) Granuloma

Leproid Granuloma

Leproid (Mycobacterial) Granuloma

Leporod granuloma in the dog often presents as ulcverated and eroded nodules on one or both ears. It is caused by some species of Mycobacteria and may be spread by insect bites. The Mycobacteria are difficult to grow and PCR is sometimes useful. Histopatology of a biopsy is used for confirmation but sometimes the organisms are hard to fin

A few cases undergo spontaneous resolution but most need systemic combination treatment and topical silver sulphadiazine. Small residula lesions can be surgically resected

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Mosquito Hypersensitivity / Allergy Cat

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Mosquito Hypersensitivity / Allergy Cat

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Mucocutaneous Pyoderma

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Mosquito Hypersensitivity / Allergy Cat

Infection commonly associated with allergy.

This condition will respond to three weeks of antibiotics at the correct dose. It may re-occur if the underlying allergies are not controlled. Mucocutaneous pyoderma must be differentiated from yeast (Malassezia) infection and immune-mediated diseases. German Shepherds seem predisposed.

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Mucocutaneous pyoderma can mimic DLE of the nose and biopsy is NOT useful in many cases to distinguish. A three week antimicrobial response trial is the best means to differentiate MCP from DLE and other immune mediated diseases of the nose

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Mucocutaneous pyoderma can mimic DLE of the nose and biopsy is NOT useful in many cases to distinguish. A three-week antimicrobial response trial is the best means to differentiate MCP from DLE and other immune-mediated diseases of the nose. Treatment was in this case topical chlorhexidine lotion and three weeks of cephalexin at 25 mg/kg 2x day

Paronychia Cat; Pemphigus Foliaceus

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Paronychia Cat; Pemphigus Foliaceus

In cases of feline pemphigus, most nails can be affected

Thick cheesy pus is characteristic

Pemphigus Erythematosus

Mucocutaneous Pyoderma of the Nose Pre-Treatment

Paronychia Cat; Pemphigus Foliaceus

Confined to head only. A more benign disease than pemphigus foliaceus.

Often responds to less aggressive therapy than pemphigus foliaceus.

Pemphigus Erythematosus Before Treatment

Pemphigus erythematosus nose

This case could be discoid lupus or pemhigus erythematous. The yellow crusts and large number of neutrophils on cytology suggested PE. This was confirmed by biopsy

Pemphigus Erythematosus Post-Treatment

Pemphigus Erythematosus Before Treatment

Pemphigus erythematosus post treatment

Short corticosteroid course and maintained on doxycycline and niacin amide combine with sun restriction

Pemphigus Foliaceus

Pemphigus Erythematosus Before Treatment

Pemphigus Foliaceus

Pemphigus foliaceus - auto-immune disease

Pemphigus Foliaceus

Pemphigus Foliaceus Footpads

Pemphigus Foliaceus

Acantholytic cells and intact neutrophils

Pemphigus Foliaceus Footpads

What are your differentials?

Footpad crusts, scale, fissure formation and erosion

Idiopathic hyperkeratosis
Split pad syndrome
Pemphigus foliaceus
Hepatocutaneous syndrome

Cytology under crusts revealed many neutrophils and some acantholytic keratinocytes. The diagnosis was confirmed by histopathology

Pododermatitis

Pemphigus Foliaceus Footpads

Chronic atopic dermatitis with yeast overgrowth

Pododermatitis Sterile Immune Mediated

Sterile Pyogranuloma - Granuloma Syndrome

Pododermatitis Sterile Immune Mediated

Bulldog with lymphocytic plasmacytic pododermatitis

Sebaceous Adenitis Hungarian Visla

Sterile Pyogranuloma - Granuloma Syndrome

Pododermatitis Sterile Immune Mediated

Sebaceous Adenitis Hungarian Visla

Immune-mediated disease attacking the oil-producing (sebaceous) glands. In the Visla, it presents as light scale and very dry skin with hair loss. Itchy only if it becomes infected. Responds to moisturizing therapy and cyclosporine

Sterile Pyogranuloma - Granuloma Syndrome

This is an immune-mediated disease of unknown origin. It appears as nodules and ulcerations on the head and body. It is a diagnosis of EXCLUSION. Differentials include tumors, eosinophilic furunculosis, bacterial, fungal, and mycobacterial infection. These are excluded by culture and histopathology. Mycobacterial PCR is usually negative,

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Trichophyton Rinworm (Dermatophytosis)

Sterile Pyogranuloma - Granuloma Syndrome

Trichophyton Rinworm (Dermatophytosis) in a Jack Russell Terrier, a breed predisposed to this. Transmitted from soil or rats and mice. Can spread to humans.

Very itchy and responds poorly to anti-itch drugs and gets worse with corticosteroids,

Typically scaly with hair loss and involves head and front limbs.

Responds well to topical and systemic antifungals (Terbinafine or itraconazole)

Vasculitis Nose

Trichophyton Rinworm (Dermatophytosis)

Vasculitis Nose

Flare up of vasculitis in a dog. Ears, toenails and feet also affected

Vasculitis Nose

Trichophyton Rinworm (Dermatophytosis)

Vasculitis Nose

Noninflammatory depigmentation. Note intact cobblestones of nasal planum.

The lips, eyelids, and foot pads were also affected. Compare with inflammatory changes seen in cutaneous discoid lupus of the nose.

Zinc Responsive Dermatosis

Malamute Husky cross. Ear with scale and secondary infection