1. Władysław Sylwester Kopytowski ( ): His life and early description of the microabscess in psoriasis 
Andrzej Grzybowski, MD, PhD, Stefania Jabłońska, MD, PhD 
Clinics in Dermatology 
Volume 29, Issue 1, Pages (January 2011)
DOI: /j.clindermatol
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2. Fig. 1
Władysław Sylwester Kopytowski ( ). (Photo courtesy of the Polish Central Medical Library in Warsaw, Poland.)
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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3. Fig. 2
Mature psoriasis: massive hyperkeratosis and parakeratosis, accumulation of leukocytes forming spongiform pustula, elongation of rete ridges, papillae with abundant leukocytes, and enlarged capillaries.
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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4. Fig. 3
Mature psoriatic lesion with abundant hyperkeratosis and parakeratosis, leukocytes in the papillae (called squarting papilla), beneath stratum corneum a large space filled with fibrinoid.
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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5. Fig. 4
The left panel shows elongated papilla with leukocytes penetrating squamous keratinocytes (squarting papilla). The right panel shows a hyperkeratotic psoriatic lesion.
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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6. Fig. 5
The accumulation of leukocytes in dermal papillae, some of them somewhat elongated, with dilated capillaries. The granular layer is partly absent.
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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7. Fig. 6
Munro microabscess: accumulation of leukocytes within stratum corneum, which is the most characteristic psoriatic papule in early psoriasis. The structure of the epidermis is still preserved, with no elongation of rete ridges.
Clinics in Dermatology  , DOI: ( /j.clindermatol )
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