远端转移是指肿瘤细胞从原始发生的部位经由侵入循环系统，转移到身体其他部位继续生长的过程。
此外，还必须开展更多的研究以评估儿童的愈后，特别是有关远端转移。
Further, there needs to be more study to evaluate the prognosis for children, especially those with distant metastases.
肺腺癌早期症状不明显且不易察觉，但末期常并发远端转移及恶性肋膜腔积水。
The end stage of lung adenocarcinoma is often associated with distant metastasis and formation of malignant pleural effusion (PE).
值得注意的是较年轻的患者更可能是非白种人男性，较年轻的患者还更可能原发肿瘤在头颈部，且局部或远端转移。
Younger patients were significantly more likely to be male and nonwhite. Younger patients were also more likely to present with head and neck primary tumors and with regional or distant metastases.
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