Changes

|linkpage =Integumentary System - Pathology

|linktext =Integumentary System

*Start as small [[Skin Glossary - Pathology|papules]] covered by brown [[Skin Glossary - Pathology|crusts]]

|maplink = Integumentary System (Content Map) - Pathology

*-> lesions join and spread -> umbilicated [[Skin Glossary - Pathology|plaques]] containing white centres with erythematous and scaly borders

|pagetype =Pathology

*Similar to [[Dermatophytosis|dermatophytosis]]

|sublink1 = Skin Congenital and Hereditary - Pathology

**Epidermal hyperplasia, [[Skin Glossary - Pathology|parakeratosis]], epidermal [[Skin Glossary - Pathology|pustules]] and superficial perivascular dermatitis

 

 

==Porcine Juvenile Pustular Psoriasiform Dermatitis (Pityriasis rosea)==

==Porcine Juvenile Pustular Psoriasiform Dermatitis (Pityriasis rosea)==

===General===

===General===

===Microscopic Lesions===

===Microscopic Lesions===

*Skin biopsy reveals superficial perivascular dermatitis with psoriasiform epidermal hyperplasia.   

*Skin biopsy reveals superficial perivascular dermatitis with psoriasiform epidermal hyperplasia.   

*The superficial dermis usually shows mild to moderate mucinous degeneration, and eosinophils and neutrophils are the predominant inflammatory cell types.   

*The superficial dermis usually shows mild to moderate mucinous degeneration, and eosinophils and [[Neutrophils|neutrophils]] are the predominant inflammatory cell types.   

*Intra-epidermal pustules containing eosinophils and neutrophils are prominent in early lesions.   

*Intra-epidermal pustules containing eosinophils and [[Neutrophils|neutrophils]] are prominent in early lesions.   

*Parakeratotic hyperkeratosis is usually prominent.

*Parakeratotic hyperkeratosis is usually prominent.

===Differential Diagnosis===

===Differential Diagnosis===

Kate

Kate

::''IL-3 is involved... Vet Path (2007)  34: 45-43''

::''IL-3 is involved... Vet Path (2007)  34: 45-43''