網(wǎng)友正在提問
為常見的原發(fā)性骨腫瘤之一，來源尚不清楚，可能起始于骨髓內(nèi)間葉組織
{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'}
