PMC3663380_01
(A) Dermoscopy showed a light to dark brown homogenous-reticular pattern (insert; area within the dashed square at higher magnification) with focal gray-brown to gray-white areas. (B) On RCM, dense edged papillae (arrows) are observed at the basal layer at low magnification (1.5 x 1.5 mm). (C) At high magnification (0.5 x 0.5 mm), small bright, monomorphous cells are seen outlining dermal papillae of different sizes and shapes (arrows). (D) Cord-like structures (arrows) are displayed at the DEJ at low magnification (1.5 x 1.5 mm). (E) Bright, branching tubular structures ("cords," arrows) are observed at the DEJ at high magnification (0.5 x 0.5 mm). Plump, bright cells are found within the upper dermis (arrowhead). (F) Histology showed epidermal hyperplasia characterized by thin strands of basaloid cells and basal hyperpigmentation without increase of melanocytes. In the superficial dermis, few melanophages and solar elastosis were present. [Copyright:  2013 Hofmann-Wellenhof et al.]
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Dermoscopy showed a light-to-dark brown homogenous-reticular pattern with focal gray-brown to gray-white areas (Figure 1A). At the basal layer, multiple densely packed edged papillae of different sizes and shapes were observed (Figure 1B). The bright cells surrounding the dermal papillae were monomorphous in size and shape (Figure 1C). In addition, bright branching tubular structures "cords" and bulbous projections were seen at the dermo-epidermal junction (DEJ) (Figure 1D). The superficial dermis displayed aggregated bright, round to triangular, non-nucleated cells, suggestive of melanophages (Figure 1E). In the superficial dermis, a few melanophages and solar elastosis were present (Figure 1B).