PMC6545490_01
Different types of nevocellular nevus [1]
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F1
Local examination revealed a pigmented, thick, and corrugated lesion that involved almost her entire scalp leaving a strip of normal skin with a width of 10 cm (Figure 2 (Fig. 2)).
Picture shows the involvement of a pigmented and corrugated nevus on the scalp.
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F2
On full body examination, she was found to have scattered, hyper-pigmented lesions fully covered with hair on the lower back and the upper thighs with estimated sizes ranging from 2x 2 to 6x 6 cm (Figure 3 (Fig. 3)). 
Hyperpigmented lesions, 4 on the back and 2 on the thighs with different sizes. All lesions were full of hair and weren't secreting any discharge.
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F3
The first tissue expansion was inserted in the scalp.
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F4
Insertion of second tissue expander
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F5
The excised skin of the patient's scalp after the second procedure
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F6
The third and last tissue expander placed in the scalp
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F7
Overall, there was no malignancy reported (Figure 8 (Fig. 8), Figure 9 (Fig. 9)). 
Higher power shows dermal nests with marked adnexocentricity, in addition to infiltrating between the collagen bundles.
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F8
Overall, there was no malignancy reported (Figure 8 (Fig. 8), Figure 9 (Fig. 9)). 
High-power view shows intact dermo-epidermal junction with pigmented melanocytic nests in the superficial part of the nevus.
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F9
Picture shows good hair growth in the occipital region 3 months after the last procedure
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F10