S6C13P7-Pemphigus Foliaceus
etc.

S6C13P7-1: In this example of superficial pemphigus (pemphigus foliaceus), the cells of the granular layer are enlarged and angulated. The cytoplasmic changes, with zones of intense basophilia, qualify as hypergranulosis. To the right, the acantholytic cells are also ghost cell;  dead keratinocytes are represented in ghost outlines.

S6C13P7-2: The acantholytic patterns are irregularly suprabasilar and confluently intermediate in location. Some of the keratinocytes in the cleft are clustered in rounded whorls. The superficial unit forms a roof; its cells are unusually acidophilic (Hailey-Hailey disease).

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S6C13P7-3: At higher magnification, acantholysis is evident by the loss of intercellular bridges, by the rounded contours of individual keratinocytes, and by dyskeratosis. Condensed, acidophilic cytoplasm of keratinocytes is a feature of the cells of the basal unit and of cells in the confluent defect. Green arrows identify two acantholytic, dyskeratotic cells. Although the cleft is in the superficial unit near the intermediate zone, there are cytologic features in keeping with a process affecting cells of the basal unit, including the basal layer. In the basal unit, the cells are not joined together by intercellular bridges (familial pemphigus-like, basal unit acantholytic disease [Hailey-Hailey disease]).

 

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