CHAPTER 6 SYMPTOM CHECKER (LESIONAL AND REGIONAL DERMATOSES) 63
CRUSTING AND EROSIVE/ULCERATIVE DERMATOSES
Pemphigus foliaceus: often more crusted than ulcerative; bridge of nose, footpads,
pinnal initial presentation, IMSD, drug induced (Promeris), dermatophyte induced
(Figures 6.61–6.64).Pemphigus vulgaris: ulcerative with adherent crust; may have oral lesions (Fig-
ure 6.65).
Bullous pemphigoid: autoantibody directed against the basement membrane zone,
ulcerative, mucocutaneous junctions often affected.
Discoid lupus erythematosus: immune complex deposition; nasal planum, pinnae,
footpads; depigmentation (Figure 6.66).
Systemic lupus erythematosus: multisystemic disease, immune complex deposition
targeting basement membrane zones (Figure 6.67).
Exfoliative cutaneous lupus erythematosus: exfoliative, crusting, and scaling; facial
distribution of German short-haired pointers; young dogs, wax and wane (see Fig-
ure 6.60).Cold agglutinin disease: tips of extremities most often affected; ulceration/necrosis.
Vasculitis: idiopathic, immune mediated, FeLV associated (necrosis of ear tips
and tail), neoplasm associated, drug induced, vaccination related (rabies), hered-
itary – juvenile polyarteritis syndrome of beagles, neutrophilic leukocytoclastic
vasculitis of Jack Russell terriers, familial cutaneous vasculopathy of German shep-
herds, cutaneous and renal glomerular vasculopathy of greyhounds, thrombovascular
pinnal necrosis of dachshunds, diabetes-associated vasculitis, rickettsial-associated
vasculitis, uremia-associated vasculitis, eosinophilic (insect), rheumatoid arthritis
(Figure 6.68).Toxic epidermal necrolysis: confluent epidermal necrosis; idiopathic, drug induced
(Figure 6.69).
Mucous membrane pemphigoid: subepidermal blistering disease; oral cavity, nasal,
pinnal, anus, eyes, genitalia.
Erythema multiforme: serpiginous or target “bull’s eye” lesions; idiopathic, vaccine
or drug induced; herpesvirus induced in the cat (Figure 6.70).
Eosinophilic nasal furunculosis: acute onset; insect/spider bite possible cause; alope-
cia, erythema, erosive, nodular,±pruritus/pain (Figure 6.71).
Canine juvenile cellulitis: “puppy strangles,” sterile granulomatous, pustular, erosive,
ulcerative; face, pinnal, peripheral lymph nodes (Figure 6.72).
Cutaneous histiocytosis: bridge nose, nasal mucosa, trunk, limbs; Bernese mountain
dogs and golden retrievers predisposed (Figure 6.73).
Staphylococcal bacterial folliculitis: superficial (crusted) and deep (ulcerative) (Fig-
ure 6.74).
Deep and intermediate mycoses: sporotrichosis, blastomycosis, cryptococcosis, coc-
cidioidomycosis (Figure 6.75).
Atypical mycobacteriosis: trauma predisposes, feline more common, ulcerative nod-
ules with fistulous tracts, adipose tissue thickened caused by infection with actino-
mycetic bacteria:Nocardiaspp.,Actinomycesspp.,Streptomycesspp. (Figure 6.76).