case_images: PMC2929512_01
case_images: A solitary oval shaped brown-black macule of 8.7 x 11.1 mm with whitish scaly surface was seen on the right upper arm.
case_images: DRP2010-543091.001.jpg
case_images: PMC2929512_01_DRP2010-543091.001.jpg
case_images: fig1
case_images: On physical examination, solitary oval shaped brown-black macule of 8.7 x 11.1 mm with whitish scales was detected on the right upper arm (Figure 1).
case_images: Dermoscopic examination demonstrated irregular flossy streaks, irregular brown dots/globules, and blue-whitish regression structures with overlying whitish scaly areas.
case_images: DRP2010-543091.002.jpg
case_images: PMC2929512_01_DRP2010-543091.002.jpg
case_images: fig2
case_images: Dermoscopic examination demonstrated light to dark irregular pigmentation with milky red areas containing irregular blue-white structures suggesting partial regression and overlaying many linear and small reflecting whitish scaly areas (Figure 2).
case_images: Hematoxylin and eosin staining revealed marked acanthosis with hyperkeratosis and irregular melanin pigment distribution throughout the epidermis to papillary dermis. The papillary dermis showed a dense infiltrate of lymphocytes and numerous scattered melanophages.
case_images: DRP2010-543091.003.jpg
case_images: PMC2929512_01_DRP2010-543091.003.jpg
case_images: fig3
case_images: Histopathological examination of hematoxylin and eosin-stained specimen (Figure 3) revealed that the epidermis showed marked acanthosis with elongation and thickening of the rete ridges with hyperkeratosis, and marked atypia of keratinocytes.