Fig. 29.23.Tightly adherent crusts surrounding hair shafts termed “keratin collaring” as seen in sebaceous
adenitis.
(a)(b)Fig. 29.24.Eight-year-old female-spayed vizsla with sebaceous adenitis. Lesions appear as irregularly shaped
patches of alopecia, erythema, and fine scaling on the pinna (a) and head (b).