Dermis showed perivascular inflammatory infiltrate and pigmentary incontinence
Liquefactive degeneration of basal cells, pigmentary incontinence
and dilation of blood vessels are observed in the poikilodermatous stage.
Pigmentary incontinence and basal cell hydropic degeneration were noted in some fields.
They comprised such characteristic features as lymphohistiocytic bandlike infiltrate occupying the upper dermis and obscuring the dermoepidermal junction, irregular acanthosis resembling the typical saw-toothed appearance, extensive liquefactive degeneration of the basal layer of the epidermis with subepidermal clefts (Max Joseph spaces), pigmentary incontinence, and numerous cytoid bodies forming huge clusters.
Liquefaction or hydropic degeneration of the basal layer leads to pigmentary incontinence
Histopathological findings from forearm showed follicular plugging, perifollicular infiltrate of lymphocytes, vacuolar degeneration of basal keratinocytes with pigmentary incontinence
in dermis consistent with lichen planopilaris.
Pigmentary incontinence was present along with lot of pigmented macrophages which was found in sub-epithelial zone (Fig.
Pigmentary incontinence and pigmented macrophages in sub-epithelial zone.
Histopathology of the pigmented lesion may show increased basal pigmentation, pigmentary incontinence
and melanophages (11, 12).
Other features of DLE like hyperkeratosis, follicular plugging, epidermal atrophy, basal layer vacuolization, basement membrane deposits, pigmentary incontinence, perivascular inflammation, periappendageal inflammation, and collagen damage were also noted.
We observed that along with other features like hyperkeratosis, follicular plugging, epidermal atrophy, basal layer vacuolization, basement membrane deposit, pigmentary incontinence
In the dermis, a scarce lymphohistiocytic or lichenoid infiltrate and pigmentary incontinence
with melanophages can be found.