592 DISEASES/DISORDERS
Crusted/hyperkeratotic/fissured footpads:
Pemphigus foliaceus (Figures 40.24–40.26)
Zinc-responsive dermatosis
Superficial necrolytic dermatitis (hepatocutaneous syndrome) (Figure 40.27)
Erythema multiforme (Figure 40.28)
Feline paraneoplastic pancreatic adenocarcinoma
Feline thymoma-associated exfoliative dermatitis (Figure 40.29)
Idiopathic/hereditary hyperkeratosis (Figure 40.30)
Dermatophytosis
Drug eruption
Feline plasma cell pododermatitis (Figure 40.31)
Eosinophilic granuloma complex (Figure 40.32)
Viral (distemper).
Sloughing/ulcerative footpads:
Trauma (Figures 40.33, 40.34)
Epitheliotropic lymphoma (Figure 40.35)
Ischemic vasculopathy
Erythema multiforme
Drug eruption
Feline plasma cell pododermatitis.
Nodular disorders of the foot:
Sterile granuloma syndrome
Pyoderma
Demodicosis
Dermatophytosis (kerion)
Nodular dermatofibroma in German shepherd dogs
Calcinosis cutis/circumscripta (Figure 40.36)
Xanthomatosis (Figure 40.37)
Neoplasia (Figures 40.38–40.40).
Asymmetrical claw disorders:
Bacterial paronychia/pyonychia
Onychomycosis
Trauma: physical, chemical, pedicure
Ungual polyp (see Figure 40.19)
Arteriovenous fistula (postsurgical declaw or trauma)
Neoplasia: squamous cell carcinoma, melanoma, mast cell tumor, metastatic
bronchogenic adenocarcinoma, keratoacanthoma.
Symmetrical claw disorders:
Bacterial infection
Metabolic disease
Symmetric lupoid onchodystrophy
Autoimmune disorders (especially pemphigus foliaceus in the cat)
Keratinization disorders
Viral diseases
Leishmaniasis