lichen striatus

[strī-ātəs]
n.
  1. A skin condition seen primarily in children and marked by a self-limited papular eruption having lesions arranged in linear groups, usually on one extremity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.