Alopecy for dilution of color in dog of yorkshire breed: case report

Abstract

The alopecia by color dilution is a rare dermatological disease that occasionally occurs in black coat and is conserved in yellow coat, and mainly accommodates dogs with dark coat, unknown etiology. It is known what type of melanin hair is in the hair. This paper reports a case of color dilution alopecia, which occurred in a dog Yorkshire Terrier of six month old seen at a private veterinary clinic in Miguel Pereira, Rio de Janeiro, who presented with hypotrichosis in the black coat. Tests were performed such as blood count and biochemistry, in addition to trichogram, fungal culture and histopathology. On the trichogram you can see an accumulation of melanin in the hair follicles, and on histopathology we have the definitive diagnosis. It is concluded that, being a rare disease, and of little knowledge, it is necessary to make a diagnosis through a good anamnesis, and a clinical examination such as trichogram and fungal culture, besides histopathology, eliminating possible causes of differential diagnoses.