网友正在提问
胃癌在我国各种恶性肿瘤中居首位，胃癌发病有明显的地域性差别，在我国的西北与东部沿海地区胃癌发病率比南方地区明显为高。好发年龄在50岁以上，男女发病率之比为2：1。胃癌的预后与胃癌的病理分期、部位、组织类型、生物学行为以及治疗措施有关。
{elseif $category['dir'] == 'jrsy' or $category['dir'] == 'xingbingke' or $category['dir'] == 'flxndy' or
$category['dir'] == 'meidu' or $category['dir'] == 'linbing' or $category['dir'] == 'szqpz' or $category['dir'] ==
'ruxiagan' or $category['dir'] == 'xbxlbryz' or $category['dir'] == 'shengzhiqinzjb' or $category['dir'] == 'nxjrsy'
or $category['dir'] == 'nvxingjrsy' or $category['dir'] == 'waiyinjrsy' or $category['dir'] == 'gangzhoujrsy' or
$category['dir'] == 'maodichongbing' or $category['dir'] == 'qianfumeidu' or $category['dir'] == 'xiantianxingmeidu'
or $category['dir'] == 'shenjingmeidu' or $question['id'] == '300855'}
