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Dermatology 2 > Equine dermatology 3 > Flashcards

Equine dermatology 3 Flashcards

Alopecia

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Dermatology Board Prep flashcards
1
Q

List the “anomalous” differentials for alopecia of the horse

A
  • Congenital hypotrichiosis (Percheron0
  • Mane and tail follicular dysplasia
  • Asynchronous shedding
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2
Q

List the “metabolic” differentials for alopecia in horses

A
  • Telogen defluxation
  • PPID (hypertrichosis)
  • Stress (pregnancy, poor nutrition)
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3
Q

List the “Neoplastic” differentials for alopecia in horses

A
  • Occult sarcoid

- Lymphoma

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4
Q

List the “inflammatory/infectious” differentials for alopecia in horses

A
  • Ecotparasite
  • Dermatophytosis
  • Dermatophilosis
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5
Q

List the “inflammatory/autoimmune” differentials for alopecia in horses

A
  • Culicoides hypersensitivity
  • Atopic dermatitis
  • Alopecia areata
  • Cutaneous lupus erythematosus
  • MEED/sarcoidosis
  • Drug eruptions
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6
Q

List the “toxic” differentials for alopecia in horses

A
  • Contact dermatitis
  • Scalding (urine/faeces)
  • Heavy metal - selenium, arsenic mercury
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7
Q

List the “traumatic” differentials for alopecia in horses

A

Scarring

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8
Q

List the “vascular” differentials for alopecia in horses

A

Ischaemic damage leading to miniaturisation of blood vessels

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9
Q

Outline the prevalence of linear keratosis in the horse

A
  • Relatively common
  • All ages/breeds, TB and quarter horse
  • Rare in ponies
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10
Q

Describe the clinical signs of linear keratosis in horses

A
  • Initially small areas of hyperkeratosis
  • Develop into alopecia
  • Lesions develop in linear direction
  • Often neck, chest, quarters affected
  • No pain, or pruritus
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11
Q

How is linear keratosis in the horse diagnosed?

A
  • Clinical presentation
  • Skin scrapes to eliminate other diseases
  • Skin biopsy showing regular/irregular hyperplasia, hyperkeratosis, lymphocytic folliculitis
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12
Q

Outline the management of linear keratosis in the horse

A
  • No treatment required

- Permanent, progressive condition

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13
Q

List your differentials for a 2yo TB gelding presented with poor haircoat, mutiple focal areas of scaling ad crusting (some circular, others irregular in shape) mostly on hindlimbs, large scabs standing out from coat, painful and resenting hair plucks from lesions, no pus or pruritus

A
  • Dermatophytosis
  • Staphylococcus
  • Eosinophilic follicutlitis
  • Dermatophilosis
  • Demodicosis
  • Pemphigus foliaceous
  • Localised keratinisation defects
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14
Q

List your differentials for a 10yo TBX gelding presented for pruritus, multiple raised wheals over neck, shoulder, trunk and ventrum which pit on pressure and are of varied size, some areas of alopecia with excoriations due to self trauma both fresh and healing

A
  • Environmental atopy
  • Dermatophyte infection
  • Contact atopy
  • Mite allergy
  • Insect bite hypersensitivity
  • Cutaneous adverse drug reaction
  • Infectious, immune mediated vasculitis
  • Erythema multiforme
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15
Q

List your differentials for a horse presented with a large wart

A
  • Papilloma virus (sarcoids)
  • Hyperkeratosis
  • Cheloid scar
  • Squamous cell carcinoma
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16
Q

List your differentials for a horse presented with small alopecic lesions

A
  • Dermatophytosis
  • Occult sarcoid
  • Abrasions
  • Insect bites
  • Ectoparasites
  • Alopecia areata
  • Dermatophytosis
17
Q

List your differentials for a 4yo WB gelding presented as dull and depressed, with all 4 limbs showing diffuse oedema with serous discharge, petechial haemorrhage of MM, extensive oedema mainly in the axilla

A
  • All causes of vasculitits
  • Vasculitis due to strangles, EVA or EIA
  • Ulcerative lymphangitis
18
Q

List your differentials for a horse presented with greasy scabs on white hind legs and exudate on platar surfaces of fetlocks, pasterns and heels, agitated and painful, resp rate 30bpm

A
  • Dermatophylosis
  • Staphylococcus
  • Dermatophytosis
  • Chorioptes
  • Photosensitsation
  • Pastern and cannon leukocytoclastic vsaculitis
  • Necrotising vasculitis
  • Systemic lupus erythematosus
  • Other causes of pastern dermatitis

Dermatology 2 (23 decks)

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