282 DISEASES/DISORDERS
Fig. 17.14.Multiple hyperkeratotic plaques on the pinna of a 12-year-old male-castrate Jack Russell terrier
with the “old dog” form of erythema multiforme.
Fig. 17.15.Erythema multiforme lesions in an 11-year-old female-spayed papillon demonstrating a serpigi-
nous and polycyclic macular and papular dermatitis affecting the entire ventrum.
Fig. 17.16.Erythema multiforme (major) in a 7-year-old female-spayed terrier mix. Necrotic epithelium is
peeling from the underlying mucosa (arrow), leaving ulcerations.