b. Imbricated (Overlapped). The edges of these skin lesions overlap.
c. Geographic (Resembling Continents and Islands). These skin lesions
have highly irregular borders which resemble a geographic formation such as a
continent. The most common example is hives.
d. Polycyclic (Multiple Rings). Skin lesions of this classification appear in
groups of round circles.
e. Serpiginous (Creeping from Part to Part). This is the type of skin lesion
which heals at one margin while spreading on the opposite side.
f. Target (Resembling a Wheal). A target lesion, also called an iris lesion, has
two or three concentric circles. Erythema multiforme, an acute inflammatory skin
disease, is an example of target lesions. See figure 3-1.
Figure 3-1. Erythema multiforme.
g. Verrucose (Wart-like). These lesions are small, usually hard lesions which
are higher than the skin. A common wart, verruca vulgaris, is an example of this type of
lesion. See figure 3-2.
Figure 3-2. Verruca vulgaris.