shagreen skin

sha·green skin

an ovoid elevated nevoid plaque, skin-colored or occasionally pigmented, smooth or crinkled, appearing on the trunk or lower back in early childhood; sometimes seen with other signs of tuberous sclerosis.
Synonym(s): shagreen patch

sha·green skin

(shă-grēn' skin)
An oval-shaped nevoid plaque, skin colored or occasionally pigmented, smooth or crinkled, appearing on the trunk or lower back in early childhood; sometimes seen with other signs of tuberous sclerosis.