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Follicular Casts

Follicular castFollicular cast
An accumulation of keratinous debris around the hair shaft seen protruding from the follicular ostium or present when hairs are plucked and examined.

 

Indicates a defect of follicular keratinisation. Commonly seen in idiopathic seborrhoea and sebaceous adenitis in dogs, and in some cases of demodicosis and dermatophytosis.  Often co-exists with comedones.

 

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Scaling and follicular casting in a dog with sedaceous adenitis
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