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pityriasis lichenoides chronica
Thursday 25 November 2021
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Microscopy
Similar to PLEVA, but less destructive
Parakeratosis present in well-demarcated zones; vacuolar interface change and lymphocyte exocytosis less than PLEVA
Wedge shaped pattern of dermal lymphocytic infiltrate
The chronic lesion shows parakeratosis with lymphocytes, similar to Munro microabscesses of psoriasis
Purpura is often present