fig8-11 lues

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 Ed. note: This is the last group of micros for this case.


Fig. 8:  Basement membrane material near the dermal-epidermal interface is identified with red arrows. Near the right margin a small portion of basal unit is preserved. Mostly, the interface is straight and basal unit is not identifiable as such; the patterns are those of an established lichenoid reaction. There are ill-defined stretches of membrane-like material outlined by yellow arrows. The material is at a fairly uniform depth from the “new” basement membrane. If we accept these stretches as remnants of the original basement membrane, then the domain between the two stretches (i.e., the old and the new) is representative of a new domain in which fibrous tissue is deposited by accretion along the surfaces of lytic defects in the epidermal domain. A plasma cell is one cell away from a double green arrow.


Fig. 9: The granulomatous qualities of the dermal infiltrate are evident. There is a multinucleated giant cell containing two basophilic particles (green arrows).


Fig. 10: The perivascular infiltrates are pleomorphic and immature lymphoid cells are represented (red arrows). Plasma cells and plasmacytoid cells are fairly numerous (green arrows).


Fig. 11: Red arrows identify plasma cells and blue arrows point to migratory histiocytes. A purple arrow identifies a mitotic figure. 

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