EVOLUTION

ANIMAL BREEDS

DISEASES

MEDICATIONS

FOOD/FEED

BEHAVIOUR

EXOTIC ANIMALS

SPECIAL SECTION

Viral Disease - Sarcoid

Etiology

Locally aggressive benign fibroblastic tumors of the skin associated with bovine papillomavirus BVP1 and BVP2

Epidemiology

Common tumor of horses, donkeys and mules. Breed differences in prevalence. Transmission by close contact and infection of wounds

Clinical findings

Single or multiple lesions in the skin of limbs, lips, eyelids, eye, penile sheath, and base of the ears. May present as warty growth or have the appearance of granulation tissue or as nodules beneath the skin. Spontaneous regression is rare

Differential diagnosis

Cutaneous habronemiasis

Phycomycosis

Fibromas

Granulation tissue

Squamous cell carcinoma, especially of the penis and eyelid

Other skin tumors, including melanoma by exami nation of a biopsy of the lesion

Papillomatosis is a disease of young horses, and unlike sarcoid, commonly spontaneously regresses.

Diagnostic confirmation

Histopathology

Treatment

No single treatment modality has an advantage.

Surgical excision,

cryosurgery,

immunotherapy,

radiation and

local chemicals are used

Control

None recognized


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