2020 Volume 19 Issue 3 Pages 197-201
We reported a case of a fibrous hamartoma of infancy occurring on the right waist of a one-year-old boy with neurofibromatosis type 1 (NF1). The subcutaneous tumor was first noticed at the age of 4 months. He presented with a 30×30 mm elastic soft mass, and vellus hairs were shown on the surface. Café-au-lait spots with halo and ectopic Mongolian spot also existed on his back. Histopathological findings from a biopsy specimen taken from it, we diagnosed the tumor as fibrous hamartoma of infancy (FHI). FHI is a benign soft tissue tumor, composed of fibrous tissue,undifferentiated mesenchymal cell nests and matured fat cells. In particular, FHI with vellus hairs or with NF 1 is a rare subcutaneous soft tissue tumor in children. It is significant that we distinguish FHI with other mesenchymal tumors with NF1. Skin Research, 19: 197-201, 2020
