By Josep Malvehy, Ralph P. Braun, Susana Puig, Ashfaq A. Marghoob, Alfred W. Kopf
The increase in approval for dermoscopy has intended that extra practitioners want a prepared connection with seek advice in a scientific context the place better atlases are much less sensible. this convenient textual content incorporates a wealth of pictures and algorithms to help in a place diagnosis.Table of Contents
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Xp 9/11/05 9:20 am Page 54 surgical scar, independent of the previous existence of a nevus or not. This pigmentation is not caused by persistence of nevus cells. Dermoscopic criteria The criteria are asymmetry, sharp borders, homogeneous or multicomponent pattern, atypical pigment network, irregular streaks, black dots, globules, and blue-gray or red colors. The dermoscopic features of persistent nevi are also commonly seen in primary melanoma. In the case of “reactive pigmentation” of scars, globules are always absent.
In the center of the lesion, symmetric gray-blue colors can be found and occasionally dotted vessels may also be seen. Some Spitz nevi can have large globules distributed through the lesion. Starburst pattern All around the periphery, one observes circumferentially distributed streaks, pseudopods or globules. This arrangement has been compared to the image of an exploding star. In some lesions, only a portion of the peripheral rim will have the starburst pattern, making the differential diagnosis of melanoma difficult.
Large CMN are often heterogeneous, displaying multiple islands of color and irregular topography. However, each “island” within the large CMN tends to be fairly homogeneous in its appearance. Knowledge of the dermoscopic features and patterns common to CMN can aid physicians in following these lesions and recognizing aberrancy that may be suggestive of melanoma. In other words, if a change occurs or the dermoscopic pattern does not conform to the known CMN patterns, then a biopsy or an excision may be warranted.