PMC3806697_01
a A 10 x 7-mm, blue-black nodule with an irregular border, which was accompanied by 1-2-mm guttate macular satellite lesions, was observed on the left forearm. b Dermoscopic examination revealed a homogeneous, blue-white structure in the absence of any other dermoscopic structures.
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F1
Physical examination revealed a 10 x 7-mm, blue-black nodule with an irregular border, which was accompanied by 1-2-mm guttate macular satellite lesions (fig. 1a). Dermoscopic examination showed a homogeneous, blue-white structure in the absence of any other dermoscopic structures (fig. 1b).
a In the main papule, there were hyperpigmented, spindle-shaped melanocytes infiltrating among the collagen bundles. No features suggestive of malignancy were seen, such as cytological atypia, atypical mitoses or necrosis. HE. Original magnification x40. b Periappendageal and perivascular concentrations of the nevus cells were observed in the main lesion. HE. Original magnification x100. c Perivascular concentration of the nevus cells was observed in the satellite lesions as well. HE. Original magnification x100.
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F2
In the histopathological examination of the excised lesion, nevus cells were dispersed in the dermis, and hyperpigmented, spindle-shaped melanocytes infiltrated among the collagen bundles (fig. 2a). Periappendageal and perivascular concentrations of the nevus cells were observed (fig. 2b). Similar findings were observed in the satellite lesions as well (fig. 2c).