We reviewed 48 skin biopsies obtained from 48 patients with epidermal nevus during a 10 year period from January 1981 to December 1990.
@ES The results are summarized as follows:
@EN 1) Of our 48 patients, 23 were male and 25 were female, and male to female ratio was 1 to 1.1.
2) The average of the patients was 19.8 years at the time of diagnosis.
3) Lesions were present at birth in 45.7 percent of patients, and most of the remainder de veloped in childhood. The mean age of onset was 7.7 years.
4) The clinical varieties of the nevi in 48 patients were classified according to categories of nevus verrucosus, including systematized epidermal neuvs, nevus nuius lateris, ichthyosis hystrix. epidermal nevus syndrome and inflammatory linear
verrucous epidermal nevus. The most common typoe was nevus verrucosus (88.6%).
5) A large variety of histopathologic changes can be seen in epidermal nevi. The most common histopathologic type was nonspecific (31.3%), followed by common (12.5%), epidermolytic hyperkeratosis (12.5%), and acanthosis nigricans(10.4%).
6) The most commonly affected area was head and neck (48.5%), followed by trunk (28.6%), upper limb (11.4%) and lower limb (2.9%). (Kor J Dermatol 1992;30(6):841-849)
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