多发性、浸润性肿瘤以及长期吸烟史是肿瘤复发的高危因素。
Multiple tumors, invasive carcinoma and long-term smoking are high risk factors for tumor recurrence.
摘要肿瘤的化学预防，即应用天然的、合成的或者生物化学因子逆转、抑制或阻止肿瘤进展为浸润性肿瘤。
Cancer chemoprevention is defined as the use of natural, synthetic, or biologic chemical agents to reverse, suppress, or prevent carcinogenic progression to invasive cancer.
使用这种方法，他们制成了治疗浸润性黑色素瘤的疫苗康维辛 （Canvaxin），这种疫苗中有20种不同的黑色素瘤肿瘤特异性成分，来把新的疾病识别方法教给人体。
The result was Canvaxin, a vaccine against aggressive melanoma that was loaded up with 20 different tumor-specific components of melanoma, teaching the body new ways to recognize the disease.
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