<unk>  presents as a patch of livid skin that is cooler than the normal skin, as a result of decreased blood flow, in which vasoconstriction of deep vessels is thought to be the underlying defect.
Nevus oligemicus
Nevus anemicus
Nevus flammeus nuchae
Hypertrichosis cubiti
Xanthoma striatum palmare
Dermatosis papulosa nigra
Granulomatous slack skin
Atrophia maculosa varioliformis cutis