Feline Dermatoses Flashcards

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1
Q

Define miliary dermatitis syndrome (“scabby cat syndrome”)

A
  • not a specific dermatosis
    • ​it is a symptom
    • it is “seedy”
    • it is a “reaction pattern”
  • C/S:
    • papular seedy eruption
      • easier to feel than to see
      • frequently: dorsal neck and back
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2
Q

What are the etiologies of miliary dermatitis syndrome?

A
  • Parasitic
  • Allergy: flea allergy (>80%), atopy, food allergy
  • I N 4
  • Microbial: Dermatophytes, Bacteria
  • E
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3
Q

How do you diagnose miliary dermatitis?

A
  • C/S: may or may not itch
  • look for underlying cause:
    • hx suggestive of allergies
    • fungal culture to rule out curable contagious dz
    • skin scrapings for parasites
    • response to flea control
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4
Q

How do you treat miliary dermatitis?

A
  • Long term (define underlying cause)
  • Short term (palliative)
    • Depomedrol
    • Prednisolone
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5
Q

Describe Eosinophilic Granuloma Complex

A
  • Includes several clinical manifestations:
    • indolent ulcer
    • eosinophilic plaque
    • collagenolytic granuloma
  • different “reaction patterns’ grouped into complex
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6
Q

Describe indolent ulcers

A
  • “rodent ulcer”
  • inflammatory ulcer usually located on the upper lip
  • unilateral/bilateral
  • potential concurrent symptoms
    • nodular pharyngeal granuloma
  • assoc. w/ underlying allergy
  • rarely will progress into SCC
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7
Q

How do you diagnose an indolent ulcer?

A
  • C/S and hx
  • Dermatopathology (biopsy)
    • r/o other conditions
    • +/- eosinophils
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8
Q

How do you treat indolent ulcers?

A
  • long term - look for underlying dz, flea control!
  • short term
    • antibiotics
    • glucocorticoids
    • cyclosporine
    • chlorambucil (resistant ulcers)
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9
Q

Describe the clinical features of eosinophilic plaques

A
  • well circumscribed red yellow edematous plaque
  • intensely pruritic
  • usually on groin or medial thighs
  • assoc. w/ allergic dz
    • especially flea allergy!
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10
Q

How do you diagnose and treat eosinophilic plaques?

A
  • Dx:
    • C/S
    • Histopathology: spongiotic dermatits w/ severe eosinophilic infiltrate
  • Tx:
    • Control underlying allergy
      • ​ASIT, food trial, flea control
      • glucocorticoids or cyclosporine
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11
Q

Describe collagenolytic granulomas

A
  • Three forms:
    • linear granulomas
      • linear, raised on caudal aspect of hind legs
      • variable pruritus
    • nodular pharyngeal granuloma
      • firm, pink, yellow lesions
      • usually assoc. w/ indolent ulcer
    • chin form (“fat chin”)
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12
Q

How do you diagnose and treat collagenolytic granulomas?

A
  • Dx:
    • hx
    • c/s
    • histopath
  • Tx:
    • glucocorticoids
    • lok for underlying ALLERGY
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13
Q

Describe feline mosquito hypersensitivity

A
  • Seasonal, non pruritic dermatitis
  • outdoor cats
  • mosquitoes and Culicoides
  • C/S:
    • papular/ulcerative, nodular lesions
      • nose
      • pinnae
      • paws
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14
Q

How do you diagnose and treat feline mosquito hypersensitivity?

A
  • Dx:
    • hx
    • clinical signs
    • histopathology
  • Tx:
    • glucocorticoids
    • avoid mosquitos
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15
Q

Describe feline alopecia

A

Various causes:

  • self-induced
    • pruritus
    • behavioral
  • endocrine

Dx: with trichography

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16
Q

What is the clinical presentation feline-induced alopecia?

A
  • Pruritus
    • allergy
    • ectoparasites
    • infection
  • behavioral excess
  • bilateral hair loss on sides/flanks
  • normal skin
  • broken hairs
17
Q

What are other causes of generalized alopecia?

A
  • dermatophytosis
  • demodicosis
  • autoimmune dz
  • telogen defluxion
  • congential or inherited alopecia
  • follicular defect
  • paraneoplastic alopecia
18
Q

How do you diagose flea allergy dermatitis in cats?

A
  • signalment
  • C/S
  • resolution w/ aggressive flea control
    • “Double Down” flea control
    • environmental
    • continuous and consistent
19
Q

Describe feline food allergy

A
  • very rare
  • not related to a change in diet
  • dx: rule out other dz, limited antigen source diet trial
20
Q

Describe feline atopy

A
  • generalized miliary dermatitis
  • eosinophilic dermatitis w/ or w/o plaque lesions
  • symmetrical hair-loss from self-trauma
  • dx by exclusion
  • treat with ASIT (allergen specific immunotherapy)
21
Q

What is your therapy for feline dermatosis?

A
  • short term (not forever)
  • symptomatic treatment
    • Depomedrol
      • cats are harder to pill, more resistant to adrenal suppression caused by glucocorticoids
    • Oral glucocorticoids: prednisolone, methylprednisolone, dexamethasone
    • Cyclosporine