• Journal of Veterinary Clinics
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• v.32 no.6
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• pp.527-529
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• 2015

A 7 year-old intact female black spotted and white hair Shih-tzu dog visited for screening of vital condition and was suspected multifocal alopecia on physical examination. On dermatologic examination, alopecia with patches on black spot area, generalized seborrhea sicca, and bacterial infection were detected. Additionally, melanin clumping in the hair shafts on the alopecic area was detected by microscopic examination. Based on the signalment and dermatologic examination, black hair follicular dysplasia was diagnosed. To our best knowledge, this the first case report of black hair follicular dysplasia in Shih-tzu.

• Journal of Veterinary Clinics
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• v.22 no.2
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• pp.157-159
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• 2005

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.