case_images: PMC3699949_01
case_images: Multi-colored blackened macula on the right calf with an irregular border
case_images: abd-88-0125-g01.jpg
case_images: PMC3699949_01_abd-88-0125-g01.jpg
case_images: f01
case_images: On physical examination, we observed a 3 cm blackened macula with an irregular border and more than one color on the right calf (Figure 1).
case_images: Peripheral atypical pigmented network structure (more marked on the right of the lesion), brownish streaks in the central area and right periphery, a peripheral area with a black blotch and some globular structures, an amorphous area with a pseudofollicular opening and pseudocysts on the left of the lesion, beyond the veil in the center of the lesion
case_images: abd-88-0125-g02.jpg
case_images: PMC3699949_01_abd-88-0125-g02.jpg
case_images: f02
case_images: Dermoscopic examination showed a peripheral atypical pigmented network structure (more marked on the right of the lesion), brownish streaks in the central area and in the right periphery, a peripheral area with a black blotch and some globular structures, an amorphous area with a pseudofollicular opening and pseudocysts on the left of the lesion, beyond the veil in the center of the lesion (Figures 2 e 3). 
case_images: Details of the suspicious area biopsied
case_images: abd-88-0125-g03.jpg
case_images: PMC3699949_01_abd-88-0125-g03.jpg
case_images: f03
case_images: Dermoscopic examination showed a peripheral atypical pigmented network structure (more marked on the right of the lesion), brownish streaks in the central area and in the right periphery, a peripheral area with a black blotch and some globular structures, an amorphous area with a pseudofollicular opening and pseudocysts on the left of the lesion, beyond the veil in the center of the lesion (Figures 2 e 3). 
case_images: Dermoscopy-guided incisional biopsy revealing a 0.37 mm-thick melanoma (panoramic view, x40, hematoxylin-eosin)
case_images: abd-88-0125-g04.jpg
case_images: PMC3699949_01_abd-88-0125-g04.jpg
case_images: f04
case_images: A diagnosis of superficial spreading melanoma was rendered (Breslow thickness = 0.37 mm) (Figure 4). 
case_images: Excisional biopsy; the area of the blotch seen on dermoscopy was histologically related to acanthosis, papilomatosis, and extensive deposition of melanin pigment in the dermis (consistent with partial regression phenomenon)
case_images: abd-88-0125-g05.jpg
case_images: PMC3699949_01_abd-88-0125-g05.jpg
case_images: f05
case_images: The area of the blotch seen on the dermoscopy was histologically related to acanthosis, papilomatosis, and extensive deposition of melanin pigment in the dermis (consistent with partial regression phenomenon) (Figure 5).