Pathology Lab # 3 (Integument System)

Question 1

Answer 1

• Does the itching start before the lesions appear?
• Have they changed his food at all / done any diet trials?
• What preventatives?

Question 2

Answer 2

Bear is a 2 year old male neutered canine (maltipoo) who has presented for pruritis with partial responsive to steroids rash which has been ongoing for the past year and a half with seasonal worsening.

Question 3

Describe the clinical lesions (What is the lesion distribution and type)

Answer 3

Lesion distribution:
• Multifocal- diffuse alopecic erythematous papules in his inguinal region.
• Palmar Paw: Diffuse alopecic erythema
• Ear: Diffuse Erythema with crusted yellow/ brown exudate.

Question 4

What diagnostic test would you like to do for bear based on the information you have?

Answer 4

• cytology, superficial skin scraping, taping.

Question 5

Answer 5

Diploid Cocci Phagocytized by neutrophils
Likely staph pseudintermedius

Question 6

Answer 6

1.) Pyoderma
2.) Epidermal Collarettes

Question 7

Also what are you looking for with a superficial scraping? What are your clinical differential diagnosis?

Answer 7

Rule out parasitic infection (ie mites) scarcoptic mange/ scabies)

Question 8

Answer 8

1.) Primary Lesions
2.) Histochemical stains, immunohistochemical stains, PCR, PARR.

Question 9

Answer 9

Signalment: 2 yo male neutered canine (maltipoo)
Age of onset: 7 months
Are lesions pruritics or painful: Pruritic
Lesion Type: Diffuse alopecic erythematous papules on abdomen, inguinal area, plantar surface of paws and ears.
Diagnostics: Positive ear cytology for yeast (malassezia). Cytology positive for diploid cocci phagocytized my neutrophils, negative superficial skin scrape. Aerobic culture pending.
Medication history: • Hx steroid use: not reliable response (currently not on them)
◦ On preventatives for parasites
Other clinical signs/ history: N/a
Differential Diagnosis:
- Canine Atopic dermatitis
• Food Allergy
• Flea allergic dermatitis ( unlikely/ on preventatives)
• Zinc Responsive Dermatosis ( Type 2 ) (highly unlikely)
- Pyoderma

Question 10

Answer 10

Question 11

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Question 12

Describe the clinical presentation.
* Lucy is a (signalment) who presented for (chief complaint)
* Describe the clinical lesions.
* On physical examination of Lucy’s skin, there is (lesion distribution and type)
* What diagnostic test would you like to do?

Answer 12

Question 13

Answer 13

Demodex -> can occur due to underlying disease

Question 14

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Question 15

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Question 16

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Telogen

Question 17

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Question 18

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Question 19

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Question 20

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Question 21

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Question 22

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Question 23

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Question 24

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Question 25

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Question 26

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Question 27

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Question 28

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Question 29

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Question 30

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Question 31

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Question 32

Answer 32

Folliculitis
- most common causes (infectious)
Staphylococcus
Demodex
Dermatophyte

Question 33

Answer 33

Ehlers-Danlos syndrome

defect in dermal collagen

Description: Cutaneous hyperextensibility and laxity.

Question 34

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Question 35

Answer 35