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FIGURE 88.10 Juvenile xanthogranuloma (JXG).

Skin-Colored Papules
Many entities may present as skin-colored papules. Here we will highlight lichen
striatus and lichen nitidus. When the papules are arranged linearly, streaming
down an extremity or across the face or neck, lichen striatus should be
considered. If the papules are not arranged linearly but are tiny pinpoint, skincolored papules, lichen nitidus should be considered, especially if a Koebner
phenomenon is present. Flat warts may be skin colored as well.
Lichen Striatus
Lichen striatus is an asymptomatic eruption of unknown cause. The flat-topped
papules are arranged linearly and may be confluent. Lesions may occur in a wide
band but remain characteristically linear or more accurately curvilinear patterns
corresponding to lines of Blaschko. The lesions are skin colored to erythematous
in Caucasians and often hypopigmented in African Americans. The eruption
follows the long axis of an extremity ( Fig. 88.11 ) or may involve any other part
of the skin surface (especially the face). Because the eruption resolves
spontaneously within 2 years, no treatment is necessary.