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Small Animal Dermatology Q&A 02 (view source)
Revision as of 08:42, 6 June 2011
, 08:42, 6 June 2011Created page with "{{Template:Manson Moriello}} centre|500px<br> <br /> '''A circular crusted lesion was found on the abdomen of a dog. The owner rep..."
{{Template:Manson Moriello}}
[[Image:Small Animal Dermatology Q&A 02.jpg|centre|500px]]<br>
<br />
'''A circular crusted lesion was found on the abdomen of a dog. The owner reports the lesion was a small red bump yesterday, and today there is this crusted lesion.'''
<br />
<FlashCard questions="3">
|q1=What are these lesions called?
|a1=
This lesion is called an epidermal collarette, and is representative of a superficial bacterial pyoderma. It results from the rupture of an intact pustule. <br><br>
After the pustule ruptures, a crust develops and spreads in a circular fashion creating a ‘collar of crust’. There may or may not be a ring of erythema at the margin. <br><br>
As the lesion heals, the center often becomes hyperpigmented.
|l1=
|q2=What other skin disease(s) can this lesion be mistaken for clinically?
|a2=
Epidermal collarettes are commonly misidentified as ‘ringworm lesions’ or dermatophytosis. Skin scrapings should be done to rule out demodicosis. If there are other dermatological signs consistent with dermatophytosis, a fungal culture should be performed. <br><br>
Pending fungal culture, the patient is best treated with a minimum of a 21 day course of antibiotics; treatment should continue for 1 week past clinical cure.<br><br>
If skin scrapings and fungal cultures are negative and the patient does not respond to appropriate antibiotic therapy, a skin biopsy is indicated to rule out other rare causes of these lesions (e.g. PF).
|l2=
|q3=What is superficial spreading pyoderma?
|a3=
Superficial spreading pyoderma is a bacterial pyoderma characterized by large epidermal collarettes with an erythematous, mild exudative/crusted leading edge.<br><br>
What is unique about this clinical form of superficial pyoderma is the lack of pustules; lesions are extensive and pustules are conspicuously absent.<br><br>
In the author’s experience this form of bacterial pyoderma is often seen in longhaired dogs, especially collie and Shetland sheepdogs, and lesions are common on the trunk.
|l3=
</FlashCard>
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[[Category:Small Animal Dermatology Q&A]]
[[Image:Small Animal Dermatology Q&A 02.jpg|centre|500px]]<br>
<br />
'''A circular crusted lesion was found on the abdomen of a dog. The owner reports the lesion was a small red bump yesterday, and today there is this crusted lesion.'''
<br />
<FlashCard questions="3">
|q1=What are these lesions called?
|a1=
This lesion is called an epidermal collarette, and is representative of a superficial bacterial pyoderma. It results from the rupture of an intact pustule. <br><br>
After the pustule ruptures, a crust develops and spreads in a circular fashion creating a ‘collar of crust’. There may or may not be a ring of erythema at the margin. <br><br>
As the lesion heals, the center often becomes hyperpigmented.
|l1=
|q2=What other skin disease(s) can this lesion be mistaken for clinically?
|a2=
Epidermal collarettes are commonly misidentified as ‘ringworm lesions’ or dermatophytosis. Skin scrapings should be done to rule out demodicosis. If there are other dermatological signs consistent with dermatophytosis, a fungal culture should be performed. <br><br>
Pending fungal culture, the patient is best treated with a minimum of a 21 day course of antibiotics; treatment should continue for 1 week past clinical cure.<br><br>
If skin scrapings and fungal cultures are negative and the patient does not respond to appropriate antibiotic therapy, a skin biopsy is indicated to rule out other rare causes of these lesions (e.g. PF).
|l2=
|q3=What is superficial spreading pyoderma?
|a3=
Superficial spreading pyoderma is a bacterial pyoderma characterized by large epidermal collarettes with an erythematous, mild exudative/crusted leading edge.<br><br>
What is unique about this clinical form of superficial pyoderma is the lack of pustules; lesions are extensive and pustules are conspicuously absent.<br><br>
In the author’s experience this form of bacterial pyoderma is often seen in longhaired dogs, especially collie and Shetland sheepdogs, and lesions are common on the trunk.
|l3=
</FlashCard>
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[[Category:Small Animal Dermatology Q&A]]