A nevus simplex is also known as a macular stain, salmon patch, angel’s kiss, or stork bite.
- Very common: 40-60% of newborns!
- Present at birth, most commonly at the forehead, glabella, upper eyelids, and nape
- Less common sites: the back, nose, upper/lower lip, and occipital/parietal scalp
- Lesions vary in color from pink to red, often with indistinct borders
- Partially/completely blanchable
- More prominent with crying, vigorous activity, or changes in ambient temp
- Most lesions fade spontaneously with 1-2 years
A nevus flammeus is also known as a port wine stain.
- Uncommon: 0.1-0.3% of newborns
- Vascular malformation that is present at birth, typically unilateral or segmental distribution that often respects the midline and most often on the head/neck but may be located at any part of the body
- Lesions do not regress; they grow in proportion to the child’s growth, becoming thicker and darker during adulthood
- Associated with multiple syndromes: Sturge-Weber, Klippel-Trenaunay, Parkes-Weber, Proteus, etc.
Which is Which?
A. Nevus simplex (NS)
B. Nevus flammeus (NF)