Abstract
A 6-year-old female Airedale Terrier presented with pigmented alopecia on the nose bridge, the pinnae, and the bilateral flank. Alopecia had been recognized at 1 year of age, and has been seen from February to August every year. Complete blood counts, blood chemistry analyses, TT4, fT4, and C-TSH level did not show any abnormalities. Histopathologic examination of the skin lesion revealed dilation of the follicular infundibula with hyperkeratosis and epidermal hyperpigmentation. Based on these findings, this dog was diagnosed as having recurrent flank alopecia with hair loss on the nose bridge and the pinnae. Her mother and a littermate had been kept by a different owner and had similar clinical findings of recurrent seasonal alopecia on the same areas. To the best of our knowledge, this is the first case of familial onset of the alopecia.
