Negative pigment network can distinguish melanoma
The negative pigment network (NPN) is seen as a negative of the pigmented network and it is purported to be a melanoma-specific structure. Abstract; Results The frequency of occurrence of NPN was higher in the melanoma group (34.6%) than in Spitz nevus (28.8%), melanocytic nevus (18.2%), and dermatofibroma (11.3%) groups. An OR of 1.8 emerged