Difference between revisions of "Small Animal Dermatology Q&A 02"
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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> | 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. | As the lesion heals, the center often becomes hyperpigmented. | ||
− | |l1= | + | |l1=Superficial Pyoderma |
|q2=What other skin disease(s) can this lesion be mistaken for clinically? | |q2=What other skin disease(s) can this lesion be mistaken for clinically? | ||
|a2= | |a2= | ||
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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> | 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). | 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= | + | |l2=Demodicosis |
|q3=What is superficial spreading pyoderma? | |q3=What is superficial spreading pyoderma? | ||
|a3= | |a3= |
Revision as of 17:42, 6 June 2011
This question was provided by Manson Publishing as part of the OVAL Project. See more small animal dermatological questions |
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.
Question | Answer | Article | |
What are these lesions called? | This lesion is called an epidermal collarette, and is representative of a superficial bacterial pyoderma. It results from the rupture of an intact pustule. |
Link to Article | |
What other skin disease(s) can this lesion be mistaken for clinically? | 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. |
Link to Article | |
What is superficial spreading pyoderma? | Superficial spreading pyoderma is a bacterial pyoderma characterized by large epidermal collarettes with an erythematous, mild exudative/crusted leading edge. |
[[|Link to Article]] |