Signalment: 13yr old neutered male Shetland sheepdog

Clinical history: The patient was presented for an evaluation of multiple “vesicles” associated with diffuse erythema and alopecia over forehead and dorsal neck. The dog has a long history of atopic dermatitis poorly controlled on Apoquel with multiple episodes of recurrent pyoderma.  Initial diagnostics included skin (too numerous to count neutrophils with 2+ cocci) and ear (3+ rods, 1+ cocci and occasional yeasts) cytology.

On dermatological examination there were multiple cyst-like formations associated with mild to moderate erythema and alopecia. Such lesions were mainly localized on the dorsal neck and forehead. Both ear pinnae were also markedly erythematous with crusts and mild lichenification. The trunk had patchy alopecia and erythema. Few epidermal collarettes were also present in the axillary and inguinal regions. Both ear canals were erythematous with moderate thick ceruminous debris with both tympanic membranes only partially visible. 

Three skin 6mm punch biopsies of the cyst-like formation were taken for histopathological assessment.

 

Figure 1. Clinical image.

FIGURES

Figure 2. HE.

Figure 3. HE.

 

 

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