广西扶绥、隆安,福建厦门、同安,江苏启东、海门,上海崇明、南汇等是全国有名的肝癌高发区,均位于东南沿海。到底是什么导致了这些地段肝癌高发呢?
\n\n大量研究发现,这些地区肝癌高发可能与以下因素有关:
\n\n我国在世界范围内属于肝炎大国,东南沿海地区乙肝病毒的感染率高于全国平均水平[2]。气候湿热、人口密度大、生活习惯、食用污染的海产品等,均是导致该地带肝炎高发的原因。
\n\n东南沿海地区气候炎热和潮湿,其亚热带气候的特点为黄曲霉素的污染创造了有利条件。当地居民的主要口粮中,黄曲霉素的污染严重程度远远高于其他地区[3]。
\n\n饮水中微囊藻分解出的微囊藻毒素有致癌和促癌作用,其能导致肝脏、胆囊病变。其中以沟塘水、河水和水库水最为严重。
\n\n我国研究者在原发性肝癌高发地区江苏海门等地的许多沟塘中均检出大量的微囊藻毒素[4],长期饮用可通过干扰脂肪代谢引起非酒精性脂肪肝,与肝炎病毒和黄曲霉毒素协同作用引起肝细胞癌。
\n\n \n\n研究表明,原发性肝癌患者中,男女比例为 2~5 : 1,男性发病风险显著高于女性[5]。
\n\n为何男性更易罹患肝癌呢?可能与以下因素有关:男性扮演的社会角色导致其更容易出现吸烟、饮酒、心理压力较大等不良行为和心理因素。
\n\n肝癌在各个年龄段都可发生,小至 2 个月的婴儿,大至 80 岁的老人,高发年龄集中在 40~60 岁。
\n\n在肝癌的高发地区,发病年龄可以提前到 35 岁;而在肝癌低发地区,则比较滞后。调查显示,肝癌流行越严重的地区,患者的平均年龄越小[6]。
\n\n近年来,我国肝癌高发年龄提前了 10 岁,肝癌已超过胃癌,位居我国消化道恶性肿瘤死亡率之首[7]。这可能与现代社会人们工作紧张、精神压力大、生活不规律、长期过量饮酒等有关。
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