Figure 2. Patterns of dermatofibroma. A, Total delicate pigment network (pattern 1). B, Peripheral delicate pigment network and central white scarlike patch (pattern 2). This is the most frequent pattern associated with dermatofibromas. C, Peripheral delicate pigment network and central white network (pattern 3). D, Peripheral delicate pigment network and central homogeneous pigmentation (pattern 4). In this case, the central homogeneous area has a bluish coloration. This atypical lesion should be excised to rule out a malignant melanoma. The histopathologic examination revealed an aneurysmatic dermatofibroma. (DermLite Foto; 3Gen LLC, Dana Point, California [original magnification x10 for all; insets in parts C and D, original magnification x25].)