fatty truncal mass

Typically, a soft fatty mass of variable size is noted at birth. The mass can be seen in one or both sides of the back and abdominal wall with extending into gluteal or groin regions. The skin over the mass is covered with a red-pinkish birthmark (port-wine stain or capillary malformation). The fatty mass may extend into the chest, abdomen or into the spinal canal (around the spinal cord).