PMC9762267_01
Pre-treatment feature in case. Brown blackish papules and skin colored papules on the chest (A and B) before treatment.
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Clinical examination revealed multiple, confluent, skin-colored and brownish black papules on the left chest (Figure 1).
Histopathological feature of skin lesion: (A) A - epidermal hyperplasia and hyperkeratosis (red arrow), B - slightly papillomatosis and infiltration of lymphocytes in the upper dermis (red arrow). Hematoxylin-eosin stain, 40x. (B) A - Hyperplasia of the sebaceous glands (red arrow). Hematoxylin-eosin stain, 100x.
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These histopathological findings supported the diagnosis of NS (Figure 2).
The patient was treated with CO2 laser. On a follow-up visit, 63 days after the initial laser therapy, most of the skin lesions on the chest flattened with some hypertrophic and atrophic scarring (red arrow) (A and B).
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On a follow-up visit, 63 days after the initial laser therapy, the treatment site had mostly healed, with some hypertrophic and atrophic scarring(Figure 3).