Another classical feature is a shagreen patch, which is a large, elevated, skin colored patch, that often appears on the lower back.
另一个典型特征是鲨皮斑块:即隆起的、正常肤色的大斑块,通常出现在下背部。
英语百科
Connective tissue nevus
A connective tissue nevus (also known as a "collagenoma", "elastoma", and "shagreen patch") may be present at birth or appear within the first few years, is elevated, soft to firm, varying from 0.5 to several centimeters in diameter, and may be grouped, linear, or irregularly distributed.