Sebaceous adenitis
Skin disease
Sebaceous adenitis is an uncommon skin disease found in some breeds of dog, and more rarely in cats, rabbits and horses. characterised by an inflammatory response against the dog's sebaceous glands (glands found in the hair follicles in the skin dermis), which can lead to the destruction of the gland. It was first described in veterinary literature in the 1980s.
Signs
There are two expressions of this condition, one for long- or double-coated breeds and one for short-coated breeds, both with differing presentations.
For long- or double-coated breeds such as Poodles, Akitas and Samoyeds, the condition often presents itself with silvery dandruff which adheres to the coat, hair loss (not to be confused with moulting or "blowing coat"), a dull and brittle coat, and later on skin lesions along the back and ears as well as thickened skin and a musty or rancid odour.
For short-coated breeds such as Vizslas, the condition causes facial swellings, nodular skin lesions, fine dandruff which does not adhere to the coat, and a general "moth-eaten" appearance to the coat.
Cause
The signs of sebaceous adenitis are caused by an inflammatory disease process which affects the sebaceous glands of the skin. The cause of the inflammatory disease is unknown. Different breeds of dogs may have different underlying causes of the disease.
Research is currently underway to find if there is a genetic predisposition for sebaceous adenitis; the exact mode of inheritance remains unknown.
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