Dermal striae (DS) or stretch marks are a dermatological condition seen microscopically as the separation of collagen fibers and rupture of elastic fibers, which are curled and clumped at the edge of the lesion. 1 In this condition, fibrillin and elastin appear in reduced amounts and are reorganized in the deep dermis. The result is discontinuity of the dermal tissue and reduction in the thickness of the epidermis and papillary dermis. 1,2 Dermal striae are in the second layer of skin, the dermis. 1,3 It can occur in small or large quantities, elevated or depressed in aspect, and vary in shape and size. DS lesions tend to appear in a parallel formation and perpendicular to the skin tension lines (STL) 4,5 which are lines that determine the maximum tension direction of human skin. 6
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