A unilateral, linear, papular-pustular dermatosis is described in a young B
rittany Spaniel dog. The dermatosis appeared to follow Blaschko's lines and
extended from the left inguinal region to the medial aspect of the left me
tatarsal area. The predominant histological finding was an eosinophilic and
neutrophilic pustular mural folliculitis with prominent acantholysis of in
fundibular epithelium. There was a rapid and long-lasting (> 15 months) res
olution after oral administration of methylprednisolone (1.6 mg kg(-1)).