Segmental form of mosaic neurofibromatosis 1
December 8th 2020A healthy 16-year-old girl presented with asymptomatic lesions she had at birth. Examination revealed a 15 cm well-demarcated light brown hyperpigmented background patch localized to the right inguinal skin-fold and, within it, café-au-lait macules and patches, greater than 1.5 cm, with diffuse freckling.