Zimmerman R R, Kung'u A
Cancer. 1978 Jun;41(6):2452-5. doi: 10.1002/1097-0142(197806)41:6<2452::aid-cncr2820410653>3.0.co;2-q.
Over a 9-year period 40 testicular and paratesticular neoplasms were seen at the Kenyatta National Hospital, Nairobi, Kenya. Their incidence rate was 0.08 per annum per 100,000 Kenyan males. This low incidence was largely accounted for by a decrease in tumors of germ cell origin. The proportional distribution of the testicular neoplasms, however, was not significantly different from findings in the United States. An inheritable factor apparently controls the decreased susceptability to testicular neoplasms.
在9年的时间里，肯尼亚内罗毕肯雅塔国家医院共收治了40例睾丸及睾丸旁肿瘤患者。其发病率为每年每10万肯尼亚男性中有0.08例。这种低发病率主要是由于生殖细胞起源肿瘤的减少。然而，睾丸肿瘤的比例分布与美国的研究结果并无显著差异。一种遗传因素显然控制着对睾丸肿瘤易感性的降低。
