Image Quiz: Dermatology-The case of the crusty cat
What's causing this cat's pruritic generalized crusting dermatitis?
This 8-year-old neutered male domestic shorthaired cat has a two-month history of pruritic generalized crusting dermatitis that has been poorly responsive to antibiotics and bathing (Figure 1). Six weeks ago, a mediastinal thymoma was surgically removed; the crusting dermatitis preceded the surgery and persisted unchanged postoperatively.
Figure 1
Cytologic examination is performed on samples of exudate under pinnal crusts (Figure 2) and on moist crusts from the ventral trunk (Figure 3).
Figure 2
Figure 3
What is your tentative diagnosis?
e) Thymoma-associated exfoliative dermatosis
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