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Black Hair Follicular Dysplasia in a Shih Tzu  

Kim Sung-ryong (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Kim Young-in (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Seo Jeong-a (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Park Ji-won (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Jeong A-young (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Lee Keun-woo (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Oh Tae-ho (Department of Veterinary Internal Medicine & Dermatology, College of Veterinary Medicine, Kyungpook National University)
Publication Information
Journal of Veterinary Clinics / v.22, no.2, 2005 , pp. 157-159 More about this Journal
Abstract
Two-month old male Shih Tzu weighing 2.1 kg was presented with alopecia in black-haired areas of the skin. The hair loss had been present since five weeks of age. There was no history of pruritus on any part of the body. No other symptoms had been recognized. Physical examination found no abnormalities other than hair loss. Skin examination showed marked alopecia of black-haired area of the body. The white areas appeared to have hair growth of normal density and texture. Affected pigmented areas showed no evidence of skin lesions. Skin scraping and fungal culture were negative. Microscopic examination of plucked black hairs showed marked pigment clumping in the remnants of the follicles and were mainly in telogen phase. But white hairs were normal in various stages of hair growth. The diagnosis of black hair follicular dysplasia was made based on the history, alopecia of the pigmented areas, the confinement of abnormalities to dark areas, and the normal unpigmented areas.
Keywords
black hair follicular dysplasia; Shih Tzu; dog;
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