Keratinocytic epidermal nevus with ipsilateral breast hypoplasia

Eric Chen, Anthony J Chiaravalloti, Justin Finch
International Journal of Women's Dermatology 2019, 5 (3): 181-182
Breast hypoplasia has been reported in some epidermal nevus syndromes, but not with a keratinocytic epidermal nevus. Herein, we describe the first case of breast hypoplasia associated with a keratinocytic epidermal nevus. Keratinocytic epidermal nevi have been shown to be associated with somatic mutations in FGFR3, PIK3CA , and HRAS. We hypothesize that hypoplasia may be due to a local mutation in the FGFR3 gene or increased androgen receptors in affected breast tissue. The patient was treated with CO2 laser with good cosmetic outcome.

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