title: Pigmentary demarcation lines. Comparison of Negroes with Japanese.
abstract: The natural pigmentary demarcation boundaries of the skin can be classified as: Group A--lines along the upper limb with variable trans-pectoral extension; Group B--lines along the lower limb; Group C--paired lines in median or paramedian course on the chest with midline abdominal extension; Group D--posteromedian demarcation; and Group E--bilaterally symmetrical, obliquely oriented hypopigmented macules on the chest. Groups A and C are the most distinct and occur in both Negroes and Japanese.
mesh_terms: D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000368:Aged; D000375:Aging; D001132:Arm; D044466:Asian People; D044383:Black People; D002648:Child; D005260:Female; D006801:Humans; D007564:Japan; D007866:Leg; D008297:Male; D008544:Melanocytes; D008875:Middle Aged; D012880:Skin Pigmentation; D013909:Thorax