Skin Other - Pathology

Seborrhea

Eosinophilic infiltration

Eosinophilic folliculitis and furunculosis

• Rare in cats, dogs, cattle and horses
• Possibly due to arthropod bites
• May be multifocal in horses

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

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