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Miscellaneous
misc.
6
Veterinary Medicine
Professional
07/27/2020

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
What histologic feature is classic for sterile pyogranuloma-granuloma syndrome?
Definition

Vertically oriented, moderate to severe pyogranulomatous inflammation (neutrophils and macrophages) that track hair follicles in a sausage-shaped or nodular pattern without luminal folliculitis

Older lesions - discrete to confluent granulomas and pyogranulomas that obliterate adnexal structures and extend from the dermis down into the deep subcutis

Acanthosis and mild focal ulcerations may also be noted

Term
Name two (2) histopathological features that distinguish keratoacanthomas from inverted papillomas?
Definition
  • Cytopathic effect in keratinocytes +/- koilocytes
  • More keratohyaline granules
Term
Vasculitis types of infiltrates (eg. Neutrophilic, Lymphocytic, Eosinophilic, Granulomatous, Cell poor vasculitis/vasculopathy)
Definition
  • Neutrophilic: drug reaction, bacterial, ischemic dermatopathy, type 3 hypersensitivities such as purpura hemorrhagica (S.equi infection or vaccination), PDNS in feeders (PCV-2)
  • Lymphocytic: drug reaction, dermatomyositis, rabies vaccine reaction
  • Eosinophilic: arthropod hypersensitivity, parasitism
  • Granulomatous: idiopathic septal panniculitis, granulomatous with polyangitis (formerly Wegners granulomatosis), CRH
  • Cell poor vasculitis/vasculopathy: vaccine induced, photo aggravated. pastern vasculitis (horses), thermal
Term
Intradermal pustular neutrophilic causes
Definition
  • Neutrophilic: bacterial, less common fungal
    • Impetigo- papules, pustules, collarettes
    • Subcorneal pustules with bacteria (Staph most common)
    • Bullous impetigo if larger (potentially immunosuppressed)
    • Superficial spreading pyoderma
    • Pustular dermatophytosis (Trichophyton spp)
Term
What is Dunstan's blue line?
Definition
  • Seen in superficial spreading pyoderma-transient pustules to crusts- degenerative bacteria and cell debris
Term
Causes of Mural Folliculitis Interface pattern
Definition
  • Demodicosis
  • Dermatophytosis
  • Feline lymphocytic and mucinotic mural folliculitis
  • Thymoma/Non-thymoma associated exfoliative dermatitis
  • Pelodera Dermatitis
  • Equine linear alopecia
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