title: [Studies on classification of nevus pigmentosus and cholinesterase activity of nevus cell].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002802:Cholinesterases / Q000378:metabolism*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009508:Nevus, Pigmented / Q000201:enzymology / Q000473:pathology*; D012878:Skin Neoplasms / Q000201:enzymology / Q000473:pathology*
chemical_list: D002802:Cholinesterases