Crusts often become thickened in haired regions as hair and crust can mat and become tightly adherent. Hall says most scaling disorders in cats result from chronic inflammation or poor grooming and therefore are usually a secondary manifestation.Ī crust is an accumulation of dried exudate, serum, pus, blood or other cells, or scale that combines with other cellular debris to adhere to the skin surface. Normal desquamation of the epidermis is invisible, so when larger flakes are apparent, abnormalities in keratinization or desquamation can be the underlying cause. Scales can look like fine powder or large flakes, they can be greasy or dry, loose or adherent, and they can be various colors, such as white, brown or beige. Scale is an accumulation of loose fragments of the skin's cornified cell layer. One of these things is not like the otherįirst things first: Let's talk about the difference between crust and scale. Melissa HallMelissa Hall, DVM, DACVD, shares her advice on how to tell the difference between the two, and how to zero in on accurate diagnosis and treatment of the most common causes of non-allergic crusting in cats.
Most lesions are easily distinguishable from each other, but crusts and scales can be more of a challenge-especially when they occur on the same patient at the same time.ĭr. Two of the most important steps when you're assessing dermatology issues in dogs and cats are (1) identifying primary and secondary skin lesions and (2) obtaining an accurate history.
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