62 BASICS
EXFOLIATIVE DERMATOSES
Dermatophytosis: can manifest as any clinical presentation, commonly exfoliative
(Figure 6.40).
Ectoparasites: cheyletiellosis, demodicosis, sarcoptid mite infestation (Figure 6.41).
Feline thymoma: erythema, face, neck; older cats, nonpruritic, exfoliative.
Keratinization disorders: keratin casts, secondaryMalasseziaovergrowth.
Vitamin A-responsive dermatosis: nutritionally responsive; cocker spaniels, westies,
dalmatians, labradors, shar-pei, fox terriers (Figure 6.42).
Zinc-responsive dermatosis: alopecia, scale, crust, erythema; periocular, pinnal, lips,
Alaskan breeds predisposed (Figure 6.43).
Follicular dysplasias: alopecia associated with hyperkeratosis and abnormal hair mor-
phology (structure/melanization) (Figure 6.44).
Idiopathic canine nasodigital hyperkeratosis: accumulation of scale of the planum
nasale and digital pad margins, generally asymptomatic (Figure 6.45).
Sebaceous adenitis: diffuse keratin casts that mat the hair to the surface of the skin,
dorsum of the body most affected including head (Figures 6.46, 6.47).
Ichthyosis: severe congenital disorder of keratinization, golden retrievers, West High-
land white terriers, cavalier King Charles spaniels, Jack Russell, Norfolk terrier,
Yorkshire terriers; tightly adhered scale secondary pyoderma, poor prognosis (Fig-
ure 6.48).Epitheliotropic lymphoma (cutaneous T cell lymhoma – CTCL): static patches of
scaling are often the first clinical signs of CTCL followed by plaques, nodules, and
tumors; also associated with depigmentation and oral lesions (Figures 6.49–6.52).Actinic keratosis: crusted erythematous patches to plaques on sun-exposed skin (Fig-
ure 6.53).
Lichenoid psoriasiform dermatosis: springer spaniels and German shepherds predis-
posed, medial aspect of pinnae and groin (Figure 6.54).
Schnauzer comedone syndrome: scaling and comedones along the dorsal trunk.
Ear margin dermatosis: dachshunds, idiopathic,±vasculitis/vasculopathy, alopecia,
fissures, keratin casts, notching (Figure 6.55).
Hereditary nasal parakeratosis of labradors: may fissure and cause some discomfort,
often nonsymptomatic, 6–12 months of age (Figure 6.56).
Superficial necrolytic dermatosis: “hepatocutaneous syndrome”; hyperkeratosis,
crusting, ulceration; pinnae, face, MCJ, joints, footpads (Figure 6.57).
Dirty face syndrome of Persian cats: erythematous and exfoliative, pruritic, red/brown
sebaceous accumulation, oftenMalasseziaovergrowth, also recognized in Himalayan
cats. (Figure 6.58).Acne: feline and canine; pyoderma variant in dogs; keratinization defect in cats (Fig-
ure 6.59).
Exfoliative cutaneous lupus erythematosus: exfoliative, crusting, and scaling; facial
distribution of German short-haired pointers; young dogs, wax and wane (Fig-
ure 6.60).