Small Animal Dermatology Q&A 12

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In January, a 1-year-old dog is presented for treatment of ‘ringworm’. The owner reports the dog has developed a ‘ringworm’ lesion on its dorsal back. There are two other dogs in the house along with three indoor cats, and none of these animals show signs of skin disease. The dog in question sleeps with the owner and she doesn’t have skin lesions. Dermatological examination reveals a focal area of non-inflammatory hair loss in the right lateral lumbosacral area. A Wood’s lamp examination is negative. The medical record indicates the dog received a subcutaneous injection of glucocorticoids 3.5 months ago at the end of September for seasonal atopy. The location of the injection was recorded as ‘subcutaneous over on the dorsum’. The dog is frequently groomed, and the owner has a penchant for having ribbons braided into the dog’s hair coat.


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The skin biopsy findings revealed a focal area of thinning of the dermis and epidermis and atrophy of the hair follicles. What is the most likely diagnosis, and what management recommendations should be made? Link to Article
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