Kopf A W, Lazar M, Bart R S, Dubin N, Bromberg J
J Dermatol Surg Oncol. 1978 Feb;4(2):153-8. doi: 10.1111/j.1524-4725.1978.tb00398.x.
The numbers of clinically diagnosed, elevated nevocytic nevi (at least 2 mm in diameter) within 50 sq cm areas on the lateral and medial aspects of the arms of 1,000 subjects (age range 2 to 87 years) were compared. A total of 349 nevi was found on the lateral aspects and only 116 on the medial aspects of arms. Nevi were found on the lateral aspects of the arms in 23.4% (234) of the subjects and on the medial aspects in but 10.9% (109) of the subjects. These differences are highly significant in both men and women. Nevi were found in 30.2% (281) of the 930 whites but in only 9.1% (5) of the 55 blacks included in the study. Also, blacks did not show greater prevalence of nevi on the lateral as compared to the medial aspects of their arms. One explanation for the greater prevalence of nevi on the lateral over that on the medial aspects of the arms is that sunlight plays a role in the induction of acquired nevocytic nevi.
比较了1000名受试者（年龄范围为2至87岁）手臂内外侧50平方厘米区域内临床诊断为增大的痣细胞痣（直径至少2毫米）的数量。在手臂外侧共发现349颗痣，而在内侧仅发现116颗。23.4%（234名）受试者的手臂外侧有痣，而只有10.9%（109名）受试者的手臂内侧有痣。这些差异在男性和女性中均极为显著。在该研究纳入的930名白人中，30.2%（281名）有痣，而55名黑人中只有9.1%（5名）有痣。此外，黑人手臂外侧的痣患病率并未高于内侧。手臂外侧痣的患病率高于内侧的一种解释是，阳光在后天性痣细胞痣的诱发中起作用。
