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A langerhans cell in the spongiform pustule of pustular psoriasis

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Summary

The pustule of pustular psoriasis of Zumbusch type has been examined electron microscopically. A Langerhans cell was found in the pustule cavity and its cytoplasm contained granules closely similar in morphology to the distinctive granules of neutrophils. These granules were conglomerated and surrounded by a membrane as a whole. Other organelles of the cell were well preserved, indicating its active cellular function. On the other hand, organelles of keratinocytes around the pustule appeared to undergo degenerating processes. It is suggested that the Langerhans cell is capable of carrying out phagocytosis more actively than keratinocytes under some pathological condition.

Zusammenfassung

Bei der elektronenmikroskopischen Untersuchung einer Pustel bei Psoriasis pustulosa (Zumbusch) fand sich im Pustelinhalt eine Langerhans-Zelle. Die im Cytoplasma dieser Zelle sichtbaren Granula waren den charakteristischen Granula der neutrophilen Leukocyten sehr ähnlich. Sie lagen zusammengepackt und waren von einer Membran umschlossen. Andere Zellorganellen zeigten morphologische Hinweise für den Fortbestand aktiver Zelleistungen. Im Gegensatz dazu standen die Zellorganellen der umgebenden Keratinocyten im Zeichen einer fortschreitenden Degeneration. Anhand dieser Beobachtungen wird vermutet, daß unter pathologischen Umständen die Phagocytoseaktivität bei der Langerhans-Zelle stärker ausgeprägt ist als in den Keratinocyten.

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Nagao, S., Iijima, S. A langerhans cell in the spongiform pustule of pustular psoriasis. Arch. Derm. Forsch. 245, 221–228 (1972). https://doi.org/10.1007/BF00595140

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